The recent 4.0 firmware parameter reset frequency is relatively high. I used mp to update the bootloader, and the flight control did not respond. I followed the standard operation, but I am not sure whether I have successfully upgraded. There is no check program, and I use the QGC software to do it. Identification, Borad: ID is 50, the upgraded flight controller is 50, and the bore without upgrade is also 50. I don’t know if I have upgraded successfully.
Are you using 4.0.9?