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) | Name | Size 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 |