⚠️ Do not flash modern ArduPilot (4.x+) or PX4 (1.13+) onto a genuine FMUv2 board. It will fail due to flash overflow. Use ArduPilot 3.6.11 (last stable for v2) or upgrade to a Pixhawk 2/4/6/Cube.
These versions utilize an older STM32 processor with a 1MB flash limit . Due to memory constraints, some newer features in modern firmware may be disabled or require specialized builds. pixhawk 248 firmware
The "248" firmware was the last "golden master" for the original 2MB flash-limited Pixhawk series before ArduPilot moved to the more resource-intensive ChibiOS operating system. ⚠️ Do not flash modern ArduPilot (4