Discussions

Hi,

I recently hooked up a new 3DR power module and APM 2.5.  When connected to the APM, I confirm that the relevant power monitor settings are:

- measure: Voltage & Current

- type: 3DR power monitor

- ver: APM 2.5+ 3DR power mon

This automatically sets the voltage divider to 10, and the amps per volt to 18.0018. However:

- When powered by my standard 2200mAH 3S battery, APM reports 48-49V.

- When powered by USB, APM reports 9-10V.

I confirm in full param list that A12,A13,10,18.0018 are all set. Using up to date (latest) version of MP, Arduplane. Tried firmware reload, eeprom format, CLI factory settings reset.

Anyone see my issue?

(I seem to be able to use "manual" settings by setting power monitor type to "Other", and entering in measured V or voltage divider, and a value for amps per volt - but I don't know an accurate amps per volt, and I'd rather find out what is wrong that prevents the standard/supported automatic method from working with this up to date equipment and software).

Thanks,

Andrew