My board was running at 2.3mA, I decided to remove the power LED since it can’t be disabled in any other way, at first it looked good, power draw had dropped to 1.4mA, but the next time I probed it had gone to 15mA.
Any suggestions for what to look for?
It’s running of a 2Ah LiPo. I tried switching to some of the default sketches, even the deepsleed RTC has a high powerdraw.
Messuring ascroos the LED pads i see 1200ohm.
Does it revert back to 2.3mA if you re-solder/re-enable the LED?
Hey Russell,
Thanks for asking.
The LED was removed mechanically since I don’t have the ability to solder small components like that. On most other Sparkfun boards you can cut a pad to disable the power LEDs, but sadly not on the Thing Plus Artimis.
The good news is that the board is now down to drawing about 6mA when running and 4.83mA in deep sleep, which is about where it was before disabling the LED. Note nothing changed I had just left the project running for a couple of days on USB.
If I connect the user-LED to the PWR pad, power draw goes from 4.83mA to 5.56mA (CPU in deep sleep). Which is in line with what I expect for the LED power draw.
The battery voltage is at 4.17v currently. The 3.3v line is 3.28v. On a side note everything I tested works as expected (I didn’t test the mic).
On a side node I noticed that the board reboots when ever I connect the USB to charge the battery. Is this expected? It’s a bit unfortunate since even the RTC resets and the idea of having a project with a chargeable battery was to avoid downtime and reboots.