I am having an issue with the voltage sensor – I just can
not seem to get it to read a voltage. It always displays 17.8 volts. I have installed
an AttoPilot Current Sensor Board. I am using the monitoring number 4 (current
and voltage). I can get a current reading which is working fine (could be 15%
out). The voltage on AN0 is connected directly to the battery so I am not using
the AttoPilot for voltage sensing.
I have a 3.9K resistor installed and if I use a multimeter
to check the resistance between ground and the AN0 pin I get 13.9K which I believe
is correct. Because there is a 10K resister on the AN0-3 pins.
It doesn’t matter what voltage I put in to the system it doesn’t
change the read out in the current test in the CLI. I have tried 2s and 3s LiPo
packs. I have also tried mode 3 which is just total battery voltage on AN0 but
I get the same results.
I am not sure who to troubleshoot this.