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3DR SiK Telemetry Radio - M10131 hwrev

FCC ID Disclaimer: This is only a product for evaluation, testing and development. Please, expand for more information.

Please note, 3DR SiK Telemetry Radio from 3DR, Inc or Mayan Robotics LLC do not possess an FCC ID. These kits are designed to allow:

  1. Product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product, and

  2. Software developers write software applications for use with the end product. It is designed to be used by product developers, software developers, and system integrators for assessing electronic components, circuitry, or software associated with the kit.

The assembled kits may not be resold or marketed unless all necessary FCC equipment authorizations have been obtained.

Users accept full responsibility for ensuring compliance with any applicable FCC regulations or authorizations should they choose to use this kit for further development or integration purposes.


This is an Original 3DR SiK Telemetry Radio. It is a small, light and inexpensive open source radio platform that typically allows ranges of better than 300m “out of the box” (the range can be extended to several kilometers with the use of a patch antenna on the ground).

Based on SI1060-A-GM from Silicon Labs, this radio uses open source firmware which has been specially designed to work well with MAVLink packets and to be integrated with the Mission Planner, Copter, Rover and Plane firmware.

This radio works on 915Mhz and you should purchase the model if it is appropriate for your country/region.


May come in 3DR or mRo casing.


Quick Start



Specifications 3DR SiK Telemetry Radio
Receiver sensitivity -121 dBm TBD
Transmit power up to 20dBm (100mW)
Air Data transfer rates up to 250kbps TBD
Dimensions 55.7mm x 25.7mm x 13mm
Weight 14.3g (0.50 oz)/22.24g (0.78 oz) with antenna

Status LEDs

The radios have 2 status LEDs, one red and one green. The meaning of the different LED states is:

  • Green LED blinking – searching for another radio
  • Green LED solid – link is established with another radio
  • Red LED flashing – transmitting data
  • Red LED solid – in firmware update mode

Connecting the radios

The radio has interchangeable air and ground modules, meaning that you use them as a pair but it does not matter which one goes on the vehicle and which remains on the ground.

The radio has a micro-USB port, and a JST-GH six-position port. The following sections explain how to connect these to autopilots and ground stations.




Both signal perspectives are shown.

Pin (wire color) Signal – Flight Controller Perspective (Direction) Signal Radio Perspective (Direction) Volt
1 (red) VCC VCC +5V
2 (black) TX (OUTPUT) RX (INPUT) +3.3V
3 (black) RX (INPUT) TX (OUTPUT) +3.3V
4 (black) CTS (INPUT) RTS (OUTPUT) +3.3V
5 (black) RTS (OUTPUT) CTS (INPUT) +3.3V



  • MAVLink protocol framing and status reporting
  • Frequency hopping spread spectrum (FHSS)
  • Adaptive time division multiplexing (TDM)
  • Support for LBT and AFA
  • Configurable duty cycle
  • Built-in error correcting code (can correct up to 25% data bit errors)
  • Demonstrated range of several kilometres with a small omni antenna
  • Can be used with a bi-directional amplifier for even more range
  • Open source firmware
  • AT commands for radio configuration
  • RT commands for remote radio configuration


How to connect it to a PC