Hi,

I have picked up a fight with a firebeetle m0 dev board and I'm afraid it's winning.

So far I have

tried the example with the blinking built-in led tried to change the blinking to an external led on the breadboard interfaced the dfplayer through uart reverted to the built-in led blinking tried to interface a waveshare e-paper module through spi

At that point I encounter a problem: the arduino IDE does not see the COM port anymore. The red power led is blinking.

I unplugged everything, turned off the computer.

Then I plugged back only the usb-c cable and tried to program the built-in led blinking example. Same problem: COM port invisible and red power led blinking.

The COM port reset procedure does not seem to help.

What do you think of all this?

Thanks