Analogue measurement from Power 1 and 2

ArduCopter Copter 4.3
1

Hello.

I am using Power 1 and Power 2 for analogue readings. I use pin 13 and 14 for this. Are the values from these readings saved in the .bat file of the log some where? If so, what is the parameter called and what is the unit of the reading?

Many thanks.

2

What flight controller is it?
If you have the voltage/current monitors configured correctly (usually defaults are OK) then the voltages and current will be recorded in the .bin log files.
There will be as many instances as monitors you have configured, for example:

BAT
   0
      volt
      voltR
      curr
      currTot
   1
      volt
      voltR
      curr
      currTot

image
image1868×812 112 KB

3

Thank you for the response. I can see the current graph like you are showing. However, I don’t understand what the supposed unit of the reading is? I have an analogue pressure sensor connected to that pin and I am trying to make sense of the reading.

Flight controller is cube blue H7 with ardupilot 4.3.3.

4

You can use an ADC input and scale it to suit your device
This might be close to what you want:
https://ardupilot.org/copter/docs/common-fuel-sensors.html#analog-fuel-level-sensors

Or you could even use the RSSI function
https://ardupilot.org/copter/docs/common-rssi-received-signal-strength-indication.html#received-signal-strength-indication-rssi

5

The units for the analog current sensors are calculated as I = (Voltage + BATT_AMP_OFFSET) * BATT_AMP_PERVLT in amps.

If you want to use some other analog sensor on these inputs, you can use the BATT_AMP_PERVLT and BATT_AMP_OFFSET parameters to scale the output to match your sensor’s units.