- I preprogram these radios to the correct bod rate so you can just connect them to your quadrino and start chaning PID's on the fly.

- The 3DR Radio telemetry system is designed as an open source Xbee replacement radio set, offering a lower price, longer range and superior performance to Xbee radios. It's availabl in 915Mhz; and in the following configurations: serial board (for the air) and USB (for the ground).

- The radio is a 2-way half-duplex wireless communication system with a standard TTL UART interface, based on HopeRF's HM-TRP data link modules, and custom firmware that improves upon the modules' original features and performance.

- The SiK firmware includes a bootloader that permits radio firmware upgrades over the serial interface, and radio firmware with configurable parameters. Firmware upgrades and configuration are fully supported in the APM Mission Planner. Configuration is also possible through AT commands.

3DR Telemetry Kit Specifications

- Very small size
- Light weight (under 4 grams without antenna)
- 915MHz
- Receiver sensitivity to -121 dBm
- Transmit power up to 20dBm (100mW / 250mW)
- Transparent serial link
- Air data rates up to 250kbps
- 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 kilometers 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
- Adaptive flow control when used with APM
- Based on HM-TRP radio modules, with Si1000 8051 micro-controller and Si4432 radio module

Package including:

1pcs X Telemetry 100mw / 500mw Kit (433mhz/915mhz send as your choice)

The wiring diagram of telemetry connect with FTDI:

Test chart  for your reference:

Note ( very important ):

our telemetry can only use with standard version APM board or Pixhawk board , if you want to use the other version APM board or the green board in the attached picture below ,please do not buy from us .or we will not responsible for it if the telemetry is broken when you use with other board .