I have recently updated 4.0 to 4.3.6 (fmu2) and have 2 problems that I have had no luck in resolving after 2 days of effort.
1 When I get the all clear to arm on MP in the main screen and the messages window, with the green light flashing, I arm using the zero throttle/right yaw on the radio and the solid green shows. But within 1 second, the fc disarms and the flashing green appears.
I tried capturing some flash logs but do not see anything suspicious. All the arm checks are on.
2 Earlier, there was the odd occasion when the arm would work and I was able to run the motors (props off), but the throttle was only active up to mid-point (approx 1500) and then raising it beyond that there was no increase in speed. I checked the radio settings and do not see any reason for this and I have done the esc calibration via the radio and the motors would accelerate all the way up to full throttle.
If I arm using the throttle/yaw and position the stick in the absolute bottom right corner, then the arming fails. However, if I add a very small amount of throttle as I arm, by lifting the throttle stick a small amount, then it arms as expected and the motors spin up.
According to the radio, throttle at zero = PWM of 988
According to MP, ch3in = 982 (after radio calibration)
Does it trigger the Radio Fail safe (by throttle) when you arm? If the throttle value fall under the throttle value you set at FS_THR_VALUE, it will trigger the Fail Safe.
FS_THR_VALUE = 910 makes no difference (no failsafe msg)
I noticed that once I get the motors to spin, when I reduce the throttle close to zero, then the motors stop with the disarm beep.
My understanding is that the motors on a quad should never stop spinning if the throttle is moved to zero. I suspect this could be my issue.