Hello DIYDrones forum!

I’m posting requesting some help on this setup please. (And for reader interest).
Mission Planner gives the PreArm Warning: Battery Failsafe. And prevents arming.
Unless I disable the volt and current sensor, in which case the Batt Volts and Amps read 0.00.
But I must have the low-battery warning working correctly.

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PixHawk Cube
ArduPilot Firmware build: V3.5.5 Octa Quad
Mission Planner 1.3.53 build 1.3.6652.13988

I have followed this guide, and entered the supplied calibration data from MAUCH.
http://ardupilot.org/copter/docs/common-mauch-power-modules.html

Read the Mauch website guide
http://www.mauch-electronic.com/pl-xxx-sensor-boards

BOTH the current Cortex Drone systems here have this problem :(


Christian from Mauch has also sent me a few emails reinforcing the setup.

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All the Sensor and Bec blue lights are on. Yellow on the GPS for Failsafe.

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Here’s the setup in Mission Planner for Optional Hardware – Battery Monitor (1).

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Mission Planner Parameters:
FS_BATT_VOLTAGE = 20

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With a pack at 23.89V and the FS_BATT_VOLTAGE set to 20V, it is still in Low Battery Failsafe.
Same with another pack at 19.8V with Low Batt voltages set o 19.5V.

Reserved capacity entered is 10,000mAh.

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Any suggestions please on what else to try?

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