Radio telemetry allow your ground station computer to communicate with your vehicle (aircraft, quadrotor, ground robot) wirelessly, providing easy way for viewing real time -flight data, changing missions on the fly.

This radio telemetry is small size , light weight and have a communication range of more than 1 km. It is fully compatible with APM 2.5- 2.6 -2.8 Ardupilotand also it can be used with other flight controllers such asmultiwii

The system provides a full-duplex link with open source firmware. Interface to the module is via standard 5V-tolerant TTL serial / FTDI USB serial. 

Firmware upgrades and configuration are fully supported in the APM Mission Planner. Configuration is also possible through the 3DR Radio configuration and AT commands

Features

• Very small size
• Light weight (under 4 grams without antenna)
• Frequency:  433 MHz 
• Receiver sensitivity to -117 dBm
• Transmit power up to 20dBm (100mW)
• Transparent serial link
• Air data rates up to 250kbps
• MAVLink protocol framing and status reporting
• Built-in error correcting code (can correct up to 25% data bit errors)
• Demonstrated range of several kilometres with a small omni antenna
• Open source firmware
• AT commands for radio configuration
• RT commands for remote radio configuration

How to use the telemetry with APM 2.X