I had two separate but related issues
SW/Firmware versions:
App 4.2.24
Mavic Air 01.00.0400
Precise fly DB for both 01.00.01.09
Basic Fly safe DB 01.00.01.07
Longer version of the sequence with all steps.
But now with even just a couple of flights under my belt I have to say : https://binged.it/2w0G8DN
Iain (Newbie flier)
--
Olmué, Chile
- Mavic Air requests compass calibration most flight attempts and then
- Mavic Air will not compass calibrate
- A IMU calibration, along with
- powering on the MA while level, right side up and stable and
- Not moving the MA once powered on
SW/Firmware versions:
App 4.2.24
Mavic Air 01.00.0400
Precise fly DB for both 01.00.01.09
Basic Fly safe DB 01.00.01.07
Longer version of the sequence with all steps.
- Unpacked the MA in California, USA, it flew multiple short flights with no problems.
- Brought MA to Chile. Flew once and then RC requested compass calibration on every "start flight"
- MA refused to compass calibrate. It succeeded on horizontal rotation and *always* failed on vertical access. 15-20 attempts. Gave up. (I attempt to calibrate in wide open space with no interference, tried every combination possible).
- Brought back to California with the intention of returning it. Quick test, prior to returning it, and no issues flying nor requesting calibrating the compass.
- Brought MA back to Chile. After first flight (no GPS lock 4-6 satellites) it requested compass calibration
- 1 out of the 5 compass calibration succeeded.
- MA flew when either:
- No GPS or
- First flight after a long power down. Subsequently it refuses to fly giving compass calibration error
- Since first calibration the MA refused to compass calibrate. It continued to fail on vertical access. 10-15 attempts. (This time in a mixture of ideal and near ideal conditions).
- Did a Firmware reload of MA via Assistant 2: no change
- Did an IMU calibration: - success(?)
- After IMU Calibration
- MA flew multiple times with no GPS Lock (4-7 Satellites)
- 2nd flight with launch site 4 metres from first one, requested compass calibration first. Compass calibration worked on 3rd attempt. It appears that moving the MA, even a few meters, while on provokes a compass calibration request.
- I moved to a park 3 kms away, and flew three successful test flights, each with full GPS lock. At no time was compass calibration requested.
- Tip: it appears that turning MA on when level, upright and stable during boot sequence improves things ie it does not ask for compass calibration so often. (Despite the training video having the MA upside down and moving around during boot sequence - does this imply a random, per drone sensitivity issue?).
But now with even just a couple of flights under my belt I have to say : https://binged.it/2w0G8DN
Iain (Newbie flier)
--
Olmué, Chile