Pixhawk 248 Firmware
Here’s the full story of that firmware era.
Which firmware should you load on a Pixhawk 2.4.8?
| Autopilot Stack | Correct Firmware Binary |
|---|---|
| ArduPilot (most common) | ArduCopter.hex (or .apj) for FMUv2 or FMUv3 |
| PX4 | px4_fmu-v2_default.px4 | pixhawk 248 firmware
Important: Do not look for "Pixhawk 2.4.8 firmware." Instead, search for FMUv2 or FMUv3 binaries. Here’s the full story of that firmware era
Performance & tuning
- Real-time scheduling: Deterministic task scheduling, fixed-rate control loops (e.g., 1 kHz inner loop).
- Low-latency I/O: DMA-driven sensors, async serial handling, optimized SPI/I2C drivers.
- Tuning tools: Onboard autotune for PID, logging-assisted tune analysis.
2. Inferior GPS Handling
While it works with standard NMEA Ublox (M8N, NEO-6M), 248 firmware does not support GPS blending (using two units) or advanced RTK GPS. You are limited to 10Hz updates. Important: Do not look for "Pixhawk 2
2. The Last Great Legacy for FMUv2 Boards
Around ArduCopter 3.6, the code size exceeded the 2MB flash limit of the original Pixhawk. Developers had to strip features. Version 248 requires zero stripping. It runs the full feature set of its era without skimping on safety checks.
Critical Warnings & Best Practices
- Do not confuse ArduPilot and PX4 firmware. Flashing the wrong one can cause sensor failures or bricking. Always match firmware to the bootloader type.
- Backup parameters before any firmware change.
- Verify hardware revision: Open the Pixhawk case – look for "2.4.8" printed on the PCB. If absent, treat it as a generic FMUv2 board.
- Calibrate after flashing: After loading firmware, always do accelerometer, compass, radio, and ESC calibration.
Problem: Drone Drifts in Loiter Mode
Solution: 248 firmware is sensitive to vibration. Ensure your Pixhawk is on anti-vibration foam. Check logs for Vibe.x/y/z – values must be below 30.
Symptom: “No airframe selected” or sensor failures after flash
- Cause: Corrupt parameter storage or incorrect firmware version.
- Fix: Do a full parameter reset (Mission Planner: Setup → Reset → Reset to Defaults).