readVin() before and after sleeping mode [BUG]

[bastientaillandier]

Subject of the issue

Reading Vin value throught readVin() function bug when OLA enter on sleep mode (after calling goToSleep() function).

Your workbench

I log IMU data at 5Hz at the beggining and print readVin() value. With just an USB alim, I have about 5.3V.

After 5s, I change the logging frequency to 0.2Hz (once per 5s), then OLA go to sleep mode, and when it wake up the voltage
of readVin() is about 0.2V.

Steps to reproduce

Connect OLA to USB, check readVin() value before and after sleep mode.

Expected behavior

Same value before and after sleep mode

Actual behavior

Strange value after sleep mode

[PaulZC]

Hi Bastien (@bastientaillandier ),

Thank you for finding this issue! I can confirm that I see the same thing (using firmware v1.6 and Apollo3 1.2.0):

I am investigating!
Very best wishes,
Paul

[PaulZC]

Hi Bastien (@bastientaillandier ),

OK. For reasons I don't completely understand, we need to call ap3_set_pin_to_analog after sleep to make the analog pins behave correctly:
https://github.com/sparkfun/OpenLog_Artemis/blob/release_candidate/Firmware/OpenLog_Artemis/lowerPower.ino#L323-L331

I have added a fix for this in the release-candidate branch and have copied the new BETA version of the firmware binary into the master branch.

Can you please test the fix and make sure it corrects your issue?
Very best wishes,
Paul

[bastientaillandier]

Hi @PaulZC

I try it myself and the bug doesn't appear anymore.
Thank you and congratulation !

[PaulZC]

Hi Bastien,

That's great news - thank you for letting me know.
I am going to leave this issue open until we release v1.7.

Thank you,

Paul

[PaulZC]

Resolved in v1.7. Closing...