CoreInk deepsleep

ckuehnel

How to deepsleep a CoreInk. The shutdown() gives a compiler error. Any idea?

felmue

Hello @ckuehnel

I am running this example from master branch successfully on my CoreInk. Care to share your code?

Thanks
Felix

ckuehnel

@felmue I tried the same w/o success. I will go into Github to look for.

ckuehnel

After looking into Github I must see that the installed library differed from the library at Github now.
After updating the compilation worked and I can test the internal battery voltage over time.

felmue

Hello @ckuehnel

great, I am glad you've figured it out. I am looking forward to hearing what you find regarding internal battery voltage over time.

Cheers
Felix

ckuehnel

@felmue It seems to me that I measure not the battery voltage. The voltage is always around 4.8 V and this could be the voltage after the SY7088. So I can use that voltage as an indicator for enough battery voltage only. If I have schematics then I have the chance to a little bit deeper. Until now I did not find the schematics, yet.
Ciao Claus

felmue

Hello @ckuehnel

Without opening M5CoreInk you probably cannot measure battery voltage with a multimeter. However you can use GPIO35 to read the battery voltage. Check out float getBatVoltage() here.

BTW: I've opened my M5CoreInk today and added some photos to my page (link below). Measuring power consumption in light sleep, deep sleep and shutdown will be next.

Cheers
Felix