Hi, I was wondering which mavlink message is used by QGC to draw battery info from Pixhawk. After searching the mavlink message definition, I found the message no: 147 to be handling the battery status from the autopilot. But it says that this message does not output the current from the battery. h…

With BATTERY_STATUS message, ArduSub will send it with all necessary data.

Thanks. :smile: My bad I didn’t read properly

Please let me know if you need any further help.

Patrick, we are trying to read batter voltage with pymavlink. We parse the BATTERY_STATUS message and receive the following: BATTERY_STATUS {id : 0, battery_function : 0, type : 0, temperature : 32767, voltages : [65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535], current_batter…

You cannot read the individual cell voltages without a battery monitor that connects to each individual cell. We do not have any experience with this, if you do find one there may be some support issues with ArduSub.

@asjb Are you using ArduCopter or ArduPlane? If so, you will get some better help at discuss.ardupilot.org .

We simply want to read the battery voltage as it appears for example in qGroundControl, but using pymavlink. Please advise. Thanks.

The current being drawn from the battery, measured in centi-amperes (like cm is centimetres). 100 cA = 1 A, just like 100 cm = 1 m. Conversely, 1 cA = 0.01 A.

Mavlink message for battery status

Blue Robotics Software

HanJIK April 13, 2022, 6:06am 15

The value displayed in current_bettey in the BATTERY_STATUS item is 380. So how is it calculated?

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