Individual configuration: Sensor may hang if no configuration given.

[realtimepeople]

Presently a virgin sensor MUST have read a meaningful set of configuration parameters as defined in the standard file sensor_config.txt.

We need to program something that make the sensor not to crash if no such file has been seen.

[MaxBaex]

I would say the sensor should, in that case use the very basic default configuration. Default mounting orientation, default time-constants, ... Ideally the sensor writes a default configuration file to the sd-card which the end can edit. It would help if the user does not need to search for an example file with the correct format.

[MaxBaex]

The sensor_config.txt file can be used to overwrite the compass calibration parameter which are optimized automatically during flight. There is the risk that users leave the sensor_config.txt file on the sd-card. This prevents that the calibration process works as the default magnetic scale and offset parameters are reset on every boot.

I suggest to only provide a sensor_config.txt file which does not write these continuously improving parameters. But which are these?

[MaxBaex]

There is a red error led on STM32:PD6 this led could be used to indicate that something e.g. the initial sensor configuration is missing.

[realtimepeople]

Solved with commit 8c37157