Not really a F4BY and not exactly a mini PIXhawk...but finally make it work...with ardupilot and jumper T18
I was looking for a mini type of pix4, 3dr pixhawk was expensive, i don't want a pix racer. Radio link mini pix does not have good reputation... I search on tao-bao, and found this: YRrc FMU Processor : SMT32f407(32bit Arm Cortx-M7 168Mhz) Sensor: Gyroscope: ICM-20689 Accelerometer: ICM-20689 Barometer: MS5607 Compass: IST8310 Support for three at most, 1 x Compass with built-in, 2x External support two at most. I though it's a copy of mini px4, but no, it's not.... it's acturally a copy of F4BY : http://swift-flyer.com/?page_id=83 but the marking and the connection chart I found(on taubau or bangood) as this one below is not correct. F4BY is supported by ardupilot https://ardupilot.org/copter/docs/common-autopilots.html the firmware like this: 2020/1/12 上午 11:34:14 : F4BY 001E0024 35374703 36353030 2020/1/12 上午 11:34:14 : ChibiOS: d2030d88 2020/1/12 上午 11:34:14 : ArduPlane V3.9.8 (6ea22c9c) To upgrade the firmware, refer to this: https://ardupilot.org/copter/...