Pixhawk 2.1 Power Module - Problem with current measurement

Hardware Pixhawk 2
1

Hello everyone,

I am getting issues while trying to measure the current with the Pixhawk 2.1 and its power module.

I have set the pins configuration according to what is recommended:
BATT_MONITOR : 4
BATT_CURR_PIN : 3
BATT_VOLT_PIN : 2
BATT2_MONITOR : 4
BATT2_CURR_PIN : 14
BATT2_VOLT_PIN: 13

When the battery is not connected, both voltage and current fluctuate between 0.1 and 0.2 (which is normal, it’s noise)
But when I connect the battery, the voltage measure is correct, whereas the current’s display drops to 0.00 A. When I spin up the motors, nothing changes.

I don’t understand what’s going on. Could you help me please ? Thanks a lot !

2

Hello,
what parameter do you have set for BATT_AMP_PERVLT
here are my setting for a mauch sensor on 3.6.0-RC7 connected on Power-1 Plug
BATT_AMP_OFFSET,0
BATT_AMP_PERVLT,32.6
BATT_CAPACITY,5000
BATT_CRT_MAH,0
BATT_CRT_VOLT,0
BATT_CURR_PIN,3
BATT_FS_CRT_ACT,0
BATT_FS_LOW_ACT,0
BATT_FS_VOLTSRC,0
BATT_LOW_MAH,0
BATT_LOW_TIMER,10
BATT_LOW_VOLT,10.5
BATT_MONITOR,4
BATT_SERIAL_NUM,-1
BATT_VOLT_MULT,9.978
BATT_VOLT_PIN,2
BATT2_MONITOR,0

3

Hello !

Thank you for your answer, I’ll try now these parameters.

Edit : It didn’t work. Actually, my parameters are quite similar to yours.