Amateur UAV Telemety Data Definition

For Discussion Purposes Only

Data is transferred from the remote vehicle to the ground station using AX.25 UI Frames.
Please visit TAPR for protocol information.

Flag Address Control PID Telemetry Data FCS Flag
01111110 112 bits 8 bits 8 bits N*8 bits 16 bits 01111110

Data Type Identifier (1 byte)NameSize in bytes Factor Range
0 reserved - - -
1 Pitch 2 0.1 0-359.9
2 Roll 2 0.1 0-359.9
3 Yaw 2 0.1 0-359.9
4 Speed 2 0.1 0-6,553.5
5 Altitude 2 1 0-65,535
6 Barometric Pressure 2 0.01 0-655.35
7 Altitude Variation 2 0.1 0-6,553.5
32 GPS Latitude 4 Value in 0.01 seconds
33 GPS Longitude 4 Value in 0.01 seconds
34 GPS Speed Over Ground 2 0.1 0-6,553.5
35 GPS Course Over Ground 2 0.01 0-655.35
36 GPS Altitude 2 1 0-65,535
37 GPS Satelites in View 1 1 0-255
64 Outside Temperature 2 0.01 0-655.35
65 Inside Temperature 2 0.01 0-655.35
128 Battery Voltage 1 1 0.1 0-25.5
129 Voltage 2 1 0.1 0-25.5
130 Voltage 3 1 0.1 0-25.5
160 Engine RPM 2 1 0-65,535
161 Engine Temperature 2 0.01 0-655.35
176 Fuel 1 1 0-255
254 Received Signal Strength Indicator (RSSI) (R/C Receiver) 1 1 0-255