Name: Silicon Labs CP210x USB to UART Bridge (COM3) Driver
Author: Silicon Labs

Question 1

Install fails or driver won’t bind?

Accepted Answer

Disconnect the CP210x device, run the Silicon Labs installer as administrator, reboot, then reconnect. If Windows blocks it, check Device Manager under “Ports (COM & LPT)” and update manually via “Have Disk.”

Question 2

Device not detected / COM3 missing?

Accepted Answer

Try another USB cable and port, avoid unpowered hubs, and confirm the board is powered. Check Device Manager for “CP210x USB to UART Bridge”; if it shows a warning, uninstall it and scan for hardware changes.

Question 3

Version conflicts / wrong COM port?

Accepted Answer

Remove older CP210x drivers in Apps & Features and Device Manager, install the current Silicon Labs VCP driver, then reassign COM3 under Port Settings > Advanced if another device is using it.