ESP8266 Community Forum

- Wed Aug 19, 2020 5:42 pm #88387 That's a tough one !

You could installed some software that affected the USB drivers !

You can install the

CP210x_Universal_Windows_Driver

again.

I'm pretty sure it's a hardware issue in my situation, my laptop uses 3.2 gen 1 USB ports only.

- Sat Aug 22, 2020 8:24 pm #88430

The thing is, I used the same USB cable on the same physical USB port with the same Wemos D1 with no issue, a number of time, then suddenly I get the error shown in the original post.

Put 220ohms resistor between D3 and GND then flash it. After flashing, upload blink code and enjoy

I have 2 versions of nodemcu, LOLIN and AMEICA

The LOLIN, flashed without the resistor and the AMEICA required the resistor.