This is unfortunately an error that still happens to this day. So I’ve put together 4 possible solutions to help you resolve this issue.

Solution 1

Check your USB cable connection. Not every USB cable is equal, some are good, some are great and some just suck.

Solution 2

Try seeing if you have the right driver installed. Have a look at the USB to Serial chip that’s on your board is using and download the driver through the manufacturer’s website.

Here’s a list of the drivers for some common USB to Serial chips on ESP32 boards:

• CH340G/C
• CP2102/CP2104

Solution 3

Try setting the Serial baud rate to 115200. It seems like a weird solution but sometimes it works.

Solution 4

Connect a 1uF ceramic capacitor between EN and GND of the ESP32. Have a look at which ESP32 module you’re using and search for the pinout online.

Here’s an example with the NodeMCU 32 board :

If you liked this tutorial please share it and ask any questions you have in the comments 😀