Pixhawk 248 Firmware -

Which you are using (Mission Planner or QGroundControl?)

Firmware is looking for SBUS/PPM but receiver is wired incorrectly. pixhawk 248 firmware

Click to download and flash the latest stable software automatically. 4. Essential Post-Flash Configuration Which you are using (Mission Planner or QGroundControl

Disclaimer: Always test older firmware in a safe, open area away from people or property. ArduPilot changes rapidly; use legacy firmware at your own risk. or release candidate tags.

Some external compasses (HMC5983, older IST8310) and GPS modules (NEO-M8N) have known driver issues in firmware 4.2+. The 248-era firmware retains rock-solid legacy driver support.

But what exactly is "248 firmware"? Unlike a specific official release from the Pixhawk project, "Pixhawk 248" typically refers to a community-optimized or legacy build—often associated with or specific custom forks that emphasize low-latency control loops, aggressive tuning for racing quads, or bug fixes for older 2MB flash-limited Pixhawk variants (like the original Pixhawk 1 or FMUv2 boards). The number "248" may appear in bootloader versions, parameter lists, or release candidate tags.