Cannot intialize battey voltage monitor

Posted by Jim Phelps on March 11, 2015 at 9:14pm

I cannot get the APM to read the battery voltage.

APM2.5

Ardurover 2.49

Voltage tapped off of 2S battery with potentiometer (8.2volts in=3.0volts out)

Monitor type is set to voltage only

Sensor (none), 

I have tried changing the monitor point from A13, A0, and A1

The reading is always 0.00.  There's not even noise be read.

Parameter is attached

Any help is appreciated.

BTW the replaced ESC fixed the no reverse problem.

Jim

100BS_Jim_031115.param

You need to be a member of diydrones to add comments!

Join diydrones

Replies are closed for this discussion.

Replies

  • Admin
    Thomas J Coyle III March 12, 2015 at 7:48am

    @Jim,

    What GCS are you using and have you attempted to calibrate the battery voltage monitor input?

    Regards,

    TCIII AVD

    • Jim Phelps > Thomas J Coyle III March 12, 2015 at 9:28am

      I am using a Turnigy 9X.   Vehicle computer is a APM 2.5.   I tried to calibrate.. Nothing happened when I entered the measured battery voltage.

       I have experience with Arducopter, so I  think I know what I'm doing there.

      Jim

  • Developer
    Bill Bonney March 12, 2015 at 7:13am
    Can you post a picture of how you have it wired up. The param file says pin 13, do you have it connected to the power module port?
    • Jim Phelps > Bill Bonney March 12, 2015 at 9:17am

      I can post a pic later today. I have a potentiometer  connected to the battery. The slider is connected to pin 13. i have also configured and tried other pins.

      jim

    • Jim Phelps > Jim Phelps March 12, 2015 at 5:32pm

      Wiring Diagram is attached.

      Jim

      ICD.png

    • Developer
      Bill Bonney > Jim Phelps March 12, 2015 at 9:34pm
      See http://copter.ardupilot.com/wiki/common-autopilots/common-apm25-and...

      Pins 12 & 13 are actually the SPI pins on the A side of the board. Outputs 9,10,11 are connected to PWM out not analogue out unless you move the solder connections

      12 & 13 are only accessed via the PM port
    • Jim Phelps > Bill Bonney March 12, 2015 at 10:17pm

      Wow! I see.  So the software parameter configuration is in error.  It infers you can use any output pin on that side.

      I also see that I had the numbering flipped also.  I thought the low end was the high end.  So much for depending on memory.

      What do you mean by the PM port?

      Should I configure for A0 ( and make sure I connect to the correct pin)?

      Jim

    • Jim Phelps > Jim Phelps March 13, 2015 at 8:31am

      Ok, I configured for A0 and made sure I was connected to the correct pin.  It's working now.

      Thanks much for to Bill and Thomas for the response.

      Pleasant Regards,

      Jim

This reply was deleted.