M5StickC: turn off screen completely

Multihelix

@maxstack - Yes, I used ESP DeepSleep set to wake on Button A being pressed, but I would say that the 5 hour time was not under ideal conditions, as I occasionally woke up the device to confirm it was still working and to check the time - a resonable activity for a watch.

spiffmonious

@multihelix Can you post a link to your watch code?

klimbot

@dda said in M5StickC: turn off screen completely:

I did a simple test: with only REG 28H the screen stays slightly warm. With both 28H and 10H, the screen cools off after a while. Hardly a scientific test, I know, but seems to point to the need to set both registers.

I'm looking at this thread to hopefully implement a complete screen turn off, but am not sure what register mask to use (based on quoted post)

Here is what I have, the screen is off but hard to know if the screen has actually been disabled.

void turnOffScreen() {
Wire1.beginTransmission(0x34);
Wire1.write(0x10);
Wire1.write(0b00000000); // 7-3=? | 2=EXTEN | 1=? | 0=DC-DC2
Wire1.endTransmission();

Wire1.beginTransmission(0x34);
Wire1.write(0x28);
Wire1.write(0b00001111); // 7-4=LDO2 | 3-0=LDO3
Wire1.endTransmission();
}

ForestRupicolous

@klimbot: I think you have to turn LDO3 and LDO2 off, in your code only LDO2 is off. Take a look at this picture: https://docs.m5stack.com/assets/img/product_pics/core/minicore/m5stickc/m5stickc_05.webp

viandou

This is how I init my M5StickC in a full black screen way.

M5.begin(0,1,1);
M5.Axp.SetLDO2(false);
M5.Axp.SetLDO3(false);