I have been developing a bluetooth controlled vehicle with a WeMos D1 R32 ESP32 microcontroller and a Adafruit motor driver v1 to power the motors. The microcontroller was working for a few weeks until one day, where it no longer able to upload code. The following error occurs whenever I upload: A fatal error occurred: Failed to connect to ESP32: No serial data received. There is power going to the board, and when I reset the board, a character, most often an "e", is pasted in the serial monitor. Before the board no longer connected the computer, the motors connected would not spin without the 9V battery plugged in. However, one time they spun slowly, and from that point onwards , I could not connect to the board. Is the problem with the board the USB port, power delivery, or something with the ESP32 itself?
Hard to tell as we don't see the board, don't know what exact wiring you had during that "accident" and what exactly you did then.
Does the USB2serial chip show up on your USB interface?
My computer displays the board connected as "USB2.0-Ser!". The wiring that I had was the motor driver shield plugged into the top of the board, with 2 TT drive motors plugged in to the shield.
That's by far not an exact enough description of the wiring. But you probably cannot give us enough details to enable us to analyze what happened to the boards. I would replace the D1 board if you checked the USB port at the PC by connecting a mouse there.
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