I have a Atmega1280 Board with the IMU. On uploading the firmware 2.0.41 from Arducopter I get an error in MP.
After this MP can´t get my AMP version. So I decided to test it with arduino 22 and I get this error:
avrdude: stk500_getsync(): not in sync: resp=0x00
I testet many times and read many threads.