I solved it as follows, in case anyone else has the same issue.

analogWrite(BACKLIGHT, 0);
delay(20);
StickCP2.Power.lightSleep();

greetings to all.

I found these methods in the documentation, but I still see that the screen does not turn off completely.

M5.Lcd.setBrightness(0);
M5.Lcd.sleep();

M5.Lcd.wakeup();
M5.Lcd.setBrightness(200);

Hello everyone

I am currently programming a clock on an M5Stickc Plus2, and I am using

M5.Lcd.fillScreen(TFT_BLACK);

to suspend the use of the screen and save battery, and when the home button is pressed I activate the screen by printing the time for 5 seconds but I see that the screen is still active since I am only projecting a black background, is there a way to turn off the screen? until a press of one of the buttons is generated.

Thank you all very much for the support you can offer me.
Greetings

Understand. Thank you very much for the reply.

Hello, how are you? I'm new to this. I bought an M5StickC Plus, and when I try to flash UiFlow onto it, it asks me to register the MAC and associate it with my email. What is the reason for this requirement? Is there any way to work with UiFlow without doing this?