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Long Range SiK Telemetry Radio - M10084 hwrev

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

Please note, Long Range 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 a product in beta stage, limited warranty and support is available


We have redesigned the old 3DR SiK radio to provide premium features such as true diversity and long range to enable BVLOS operative capacity in a small and power efficient package..

The radio uses open-source firmware which has been developed for the MAVLink standard protocol and may be integrated with major open source flight stacks and ground station software such as Mission Planner and QGC.

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


Quick Start


Specifications 3DR SiK Telemetry Radio
Receiver sensitivity -121 dBm TBD
Transmit power up to 29dBm
Air Data transfer rates up to 250kbps TBD
Dimensions 54.7mm x 24.7 mm x 11.6 mm (bounding box including case and SMA connectors)
Weight 17.3 g (0.61 oz)
Antenna Options Weight(2x) Total weight Dimensions
2x 2dBi 915MHz General Purpose Antenna 46.3 g (1.63 oz) 63.6 g (2.24 oz) 202 mm (7.9 in.) x 13 mm ( 0.51 in.)
2x 1.2dBi 915MHz Long Range, Sensor Networks, SigFox Whip, Tilt RF Antenna 27.9 g (0.98 oz) 45.2 g (1.59 oz) 140 mm (5.5 in.) x 10 mm (0.39 in.)

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