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Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
----------------Page (7) Break----------------
Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
----------------Page (8) Break----------------
Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
----------------Page (9) Break----------------
Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
----------------Page (10) Break----------------
Page 1 -- Technical Specs -- 
- Technical Brief
Technical Specs (subject to change) 
1.          Introduction
Walabot is a programmable 3D sensor that looks into objects using radio frequency technology that 
breaks through known barriers, bringing highly sophisticated sensing capabilities to your fingertips. 
Walabot uses an antenna array to illuminate the area in front of it, and sense the returning signals. The 
signals are produced and recorded by VYYR2401 A3 System-on-Chip integrated circuit. The data is 
communicated to a host device using a USB interface, which is implemented using Cypress controller. 
The left picture shows the backside of the board, with the VYYR2401 chip, the USB controller and the 
micro-USB connectors. The right picture shows the antenna array. This side should be directed towards 
the objects you want to sense.
----------------Page (0) Break----------------
Page 2 -- Technical Specs -- 
2.          Features
 Three-dimensional radio-frequency based sensor 
 Uses an array of linearly polarized broadband antennas 
 Frequency range: 
Developer 
o 3.3-10 GHz (US/FCC model)
o 6.3-8 GHz (EU/CE model)
Starter 
o 6.3-8 GHz
 Based on VYYR2401 A3 System-on-Chip for signal production and recording 
 Cypress FX3 controller for USB communication and data pre-processing 
 Walabot interface connectors: 
o Micro-USB 2.0 for high-rate data communication. Option to provide supply from USB.
o Single supply voltage 4.5-5.5v input for non-USB power applications.
2.1         Feature summary of Starter, Creator and Developer models 
Capability  \  Model Walabot Starter Walabot Creator Walabot Developer 
Physical 
Number of antennas 3 15 18 
Board size 72 mm * 48 mm 72 mm * 140 mm 72 mm * 140 mm 
External powering option No Yes Yes 
Software API capabilities 
Basic API functions Yes Yes Yes 
2D acquisition Yes Yes Yes 
3D acquisition No Yes Yes 
Multiport recorder (raw data) No No Yes 
Software application capabilities 
Breathing detection Yes Yes Yes 
Object detection Yes Yes Yes 
Short range imaging No No Yes 
----------------Page (1) Break----------------
Page 3 -- Technical Specs -- 
3.          Functionality
3.1         Overview 
Walabot senses the environment by transmitting, receiving and recording signals from multiple 
antennas. The broadband recordings from multiple transmit-receive antenna pairs are analyzed to 
reconstruct a three dimensional image of the environment. Analysis of sequences of images allows 
detecting changes in the environment. Walabot is capable of short-range imaging into dielectric 
environments, such as drywall and concrete. 
Host device USB 
Data 
acquisition 
RFIC
Walabot 
Environment 
to be sensed 
This opens the possibility to use Walabot for numerous use-cases: 
 In-room Imaging 
 In-wall imaging 
 Object detection, location and tracking 
 Change detection 
 Speed measurement 
 Motion sensing, such as breathing detection 
 Sensing of dielectric properties of materials 
Some of these capabilities are provided within the software API of Walabot. 
3.2         Software API 
Walabot SDK provides shared libraries with a defined API. In addition, binding code is provided for 
java  and  C#  (JNI  &  pInvoke  interfaces). Development of an  application  for  Walabot  can  be  done 
either for Windows/Linux or for Android. Programming languages can be: 
 C#/VB/C++ for windows 
 C++ for Linux (future release) 
 Java/C++ for Android (future release) 
The API functions can be grouped into following categories (subject to change): 
    General Initialization and configuration – common for all use-cases
----------------Page (2) Break----------------
Page 4 -- Technical Specs -- 
 Single Target Location 
 Respiration and heartbeat monitoring 
 General Doppler speed measurement 
 RF Imaging 
 People presence monitoring 
The API allows writing powerful and flexible applications easily. For example, high-level flow to get RF 
image from the device is as follows: 
 Initialize the device 
 Set the input parameters – the arena dimension, resolution and medium dielectric constant. 
 Perform recording. 
 Get the resulting 3D image. 
For additional information regarding API and sample code examples please 
refer to http://api.walabot.com/
We also have a beta version.
For additional information regarding our beta API and sample code examples 
please refer to http://api.beta.walabot.com/
----------------Page (3) Break----------------
Page 5 -- Technical Specs -- 
4.          Block Diagram
Figure 2 presents a high level block diagram of the Walabot platform. 
5.          Interfaces
The module main interface is USB for communication and configuration. 
5.1          USB Interface 
The onboard μUSB 2.0 connector supports USB 2.0 in High-Speed mode (480Mbit) and USB 3.0 in Super- 
Speed mode. 
5.2         Powering options 
The Walabot Developer and Creator have two μUSB connectors – one is used for data transfer and 
possibly powering the Walabot, and the other USB connector is for power only. Select your power 
source for Walabot using the jumper on the back side of Walabot board. In the figures below you can 
see the jumper position for powering through the main (blue) or the auxiliary (green) USB port.
----------------Page (4) Break----------------
Page 6 -- Technical Specs -- 
When you are at the point in your project where you would like to place the board in a case, you will 
need to experiment with the powering option and place the jumper accordingly.   By default, the board 
is configured to provide power using the main USB port. 
The external powering requires a 5 Volt (+/- 10%) supply. Walabot consumes 0.4-0.9 Ampere current, 
depending on application and operation profile. 
6.          Software Installation
Walabot software installation depends on the platform. You’ll have to follow instructions specific 
to your OS. Check on the Walabot site (http://api.walabot.com/_install.html) for the latest 
instructions and documentation.
----------------Page (5) Break----------------
Page 7 -- Technical Specs -- 
7.          Antennas and RF characteristics
7.1         Antenna Characteristics 
The antennas have broadband performance covering the 3-10 GHz frequency range. Representative 
simulated gain patterns at low/medium/high frequency of the Creator model are shown below: 
7.2         Antenna numbering 
In scenarios where you want to relate the data from specific antenna pairs to antennas’ locations, you 
may refer to the figure below, for numbering of antennas in the Starter, Creator, and Developer models. 
----------------Page (6) Break----------------
Page 8 -- Technical Specs -- 
7.3         RF Characteristics 
Walabot operates over an ultrawideband (UWB) range of frequencies corresponding to the regulatory 
domain of the model. The US/FCC models of Walabot Developer can operate over 3.3-10 GHz range. The 
European/CE models can operate over 6.3-8 GHz range. Walabot starter operates between 6.3-8 GHz 
range.  The average transmit power of both models is below -41dBm/MHz. These power levels do not have 
any health issues whatsoever. The range of frequencies is predetermined for each regulatory domain. 
7.3.1       Operating Walabot in conjunction with other wireless devices 
In some cases your projects may contain both Walabot module and an additional wireless device for 
communications in proximity to each other. It is best to configure the devices such that their 
frequencies of operation do not overlap. For example, if the FCC model of Walabot is used in 
conjunction with a WiFi module, it is the safest to configure WiFi to operate in the 2.4 GHz band, rather 
than in the 5 GHz band. If you configure Walabot to use 3.3-4.8 GHz subband or the 6.3-8 GHz subband 
(as in CE models), both 2.4 and 5 GHz bands of WiFi are safe to use. Bluetooth, Zigbee and cellular 
bands are all below 3 GHz and should pose no mutual interference challenges.  We recommend locating 
the modules furthest away from each other. 
8.          Mechanical data
Eventually, as your Walabot board becomes part of your project, you’ll want to secure it in a safe and 
convenient place. Several options are possible. 
We supply an optional protective case, which can be used to host the Walabot board. This case 
comprises a magnetic mount on its back, which enables it to attach to iron surfaces. We supply a 
stick-on metallic ring which can be placed on your cellphone, or your robot, or the wall of your 
lab, so that you can attach and detach Walabot easily. Make sure that the front side (the side 
without the logo) is facing towards the area of interest. 
You can fix Walabot to the surface of your project, or to its cover. Make sure that the front 
cover is nonmetallic (e.g. plastic) and preferably thin (not exceeding 2 mm). Make sure that the 
front side with the antennas is facing outwards. 
In the case of temporary use of bare board, be sure to lay it on a non-conducting surface, to 
prevent an electric short. Avoid repeated strain on USB connectors.
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Page 9 -- Technical Specs -- 
8.1        Starter model 
Back View   Front View 
8.2        Creator and Developer models 
Back View   Front View 
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Page 10 -- Technical Specs -- 
8.3         Optional case 
Back View   Front View 
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Page 11 -- Technical Specs -- 
9.          Regulatory Information
9.1         Regulatory Conformance 
The Walabot device has been designed to be in compliance with the FCC regulations governing UWB 
hand-held systems (Part 15.519) also known as “battery powered devices” or “mobile devices.”  This 
means that the device can be incorporated in a wide variety of products including educational robots, 
pipe locators, breathing monitors, etc.  Note that there are other applications which are specifically 
forbidden, such as use of the devices in toys.  See FCC Parts 15.519 and 15.521 for more details. 
Certain models of the Walabot device have been designed and tested to be in compliance with CE 
requirements, and in particular to conform to ETSI standards EN 302 065-1, EN 301 489-33 and EN 301 
489-1. In particular, the CE compliant devices are restricted to operation in the 6-8.5 GHz band.  Make
sure that if you design to use the device outside US, that you have the appropriate model number. 
9.2         FCC regulatory statements 
This device complies with 47 CFR Part 15 of the FCC Rules.  Operation is subject to the following two 
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any 
interference received, including interference that may cause undesired operation. 
The user is cautioned that changes or modifications not expressly approved by the party responsible for 
compliance could void the user’s authority to operate the equipment. 
This device may not be employed for the operation of toys. Operation onboard an aircraft, a ship or a 
satellite is prohibited. 
The use of this device mounted on outdoor structures, e.g., on the outside of a building or on a telephone 
pole, or any fixed outdoors infrastructure is prohibited. 
Moreover, the following statements apply: 
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant 
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 
in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference to radio communications. 
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
—Reorient or relocate the receiving antenna. 
—Increase the separation between the equipment and receiver. 
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
—Consult the dealer or an experienced radio/TV technician for help. 
9.3         FCC ID Labels 
The Walabot products have a FCC ID of 2AHIS-VMAKER. The FCC ID marking is found on the right lower 
front side of the printed circuit board. 
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Aero Fulfillment Services
6023 Union Centre Blvd
Fairfield, OH 45014
USA

[email protected]

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