Dual battery sensor - Pixhawk 1

Hey guys, is there a way to display the info of two batteries? I’m using the main battery with the current sensor for the pixhawk and the electronics. And I have a second battery for the FPV electronics. I want to see the voltage of the second battery in the osd information.

Thanks in advance

If I remember correctly, the ADC pin senses analog voltage, so maybe that one could be hooked up to the voltage pin of a power module and transmitted. I’ve never done it though.

You might also consider ESC telemetry over a serial port to free up a power module http://ardupilot.org/copter/docs/common-dshot.html

Full disclosure…I have no personal experience with this but had thought about it.

I don’t know if this is the solution for you but certainly worth looking into Mauch.

Good luck.

I found this topic on GitHub https://github.com/ArduPilot/ardupilot_wiki/issues/154

I will research a bit more

I successfully use 2 batteries on a QPLANE with pixhawk 1 flightcontroller
( "DoubleBat" Power Supply For Quadplanes ):

Just connect the voltage and current sensors to the 3.3V AD inputs or use a simple voltage divider. Caution: the input voltage must not exceed 3.3 volts. Set BATT2_MONITOR to 3 (voltage only) or 4 (voltage and current) and BATT2_VOLT/AMP_PIN to 13 and/or 14. Finally, you have to calibrate BATT2_AMP_PERVLT / BATT2_VOLT_MULT.

Regards Rolf

1 Like

Thank you very much! I will try it and let you know the results