That's right, it looks like that was the problem. Thank you very much. What a peculiar behaviour if you init Serial twice.

Michael

Sure. Even this tiny example fails. It prints "Begin", but not the "initializing ... OK" which M5.begin() usually prints.

#include <M5EPD.h>

M5EPD_Canvas canvas(&M5.EPD);

void setup() {
Serial.begin(115200);

Serial.printf("Begin\n");
delay(1000);

M5.begin();
M5.EPD.Clear(true);
}

void loop() {
yield();
}

I'm not manually resetting it, no. But even if I reset it, it doesn't work.

Hi,

I'm doing my first steps with the M5Paper and even the slightest examples often fail, because the device is stuck in the M5.begin() function - it never returns from it.

With the next upload, it works again, slightest change - stuck again.

I'm using Arduino IDE. Am I doing something wrong or is my device faulty?

Best regards,

Michael