I didn't tried yet the dataflash because I couldnt solder the 2 red wires changing 3.3 and 5V so my level shifter is OFF and my dataflash is not working for now.
Also, dataflash never worked (with firmware 2.9b before cutting…"
I will resume my problem and the solution:My board is 2.5.2 (not original) and with firmware 2.9 works fine (or it appears to be but it is in danger).After trying to update firmware from 2.9 to 3.0 or 3.0.1 the problem is the bad gyro health caused…