#include <M5StickCPlus.h>
// DANGER WILL ROBINSON: This sketch turns the device off. To upload,
// turn the device on as soon as you see "Connecting..." in the IDE.
// Otherwise the device isn't on when you try to upload to it!
void setup() {
M5.begin();
// This does not minimize the beightness of the "flash"
// M5.Axp.ScreenBreath(7);
M5.Lcd.fillScreen(BLACK);
}
void loop() {
M5.Lcd.setTextSize(3);
M5.Lcd.println("BYE");
delay(5000);
M5.Axp.PowerOff();
}

Is there a way to avoid this "flash"? This is probably a bug in M5.begin(), one would want to initialize the screen memory before turning the LCD on.