Copter-4.2.0-beta2 released!

Hi @MaxBuzz,

Thanks for testing 4.2 and reporting back. Any chance you could provide an onboard log? Ideally one for the working 4.1 and the not-working 4.2.

The MinimOSD uses mavlink so my first guess is that the SERIALx_BAUD or SERIALx_PROTOCOL (where “x” is the serial/telemetry port connected to the MinimOSD) has changed for some reason.

I’ve added this to the 4.2 issues list.

Update: as highlighted on this other thread, the issue must be the change to when AP starts using MAVLink2. Could you try setting SERIALx_PROTOCOL = 1 for the serial port connected to the MinimOSD?