Hi Heltec,
I was flashing my AB01 via USB when suddenly the serial readout stopped working. I figured it was something wrong with my code, so I flashed the “Time” example just to make sure. Unfortunately, that had the same result as well.
I can see the bootloader working (“All rights reserved”, etc), but as soon as it gets into any custom code it spits out a backwards question mark and ceases function. A backup board works just fine, so I can confirm that it’s not the cable.
Any ideas for how to restore my board back to the factory settings? Or it is simply broken?