Windows 11 detects ESP32-S3 as an unknown device (CH340X)

balazspavai
Posts: 6
Joined: Fri Feb 21, 2025 12:00 pm

Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby balazspavai » Thu Dec 18, 2025 2:36 pm

Hi everyone,

Windows 11 detects my ESP32-S3 as an unknown device.
The board uses a CH340X USB-to-serial chip.

I’ve tried different USB cables and ports, but the issue remains.

esp32s3.png
esp32s3.png (538.42 KiB) Viewed 2429 times

MicroController
Posts: 2661
Joined: Mon Oct 17, 2022 7:38 pm
Location: Europe, Germany

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby MicroController » Sat Dec 20, 2025 1:14 pm

Driver issue maybe?

balazspavai
Posts: 6
Joined: Fri Feb 21, 2025 12:00 pm

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby balazspavai » Sat Dec 20, 2025 3:14 pm

Driver issue maybe?

Thank you for your reply.
I tried what you suggested, but unfortunately it didn’t solve the problem for me.

MicroController
Posts: 2661
Joined: Mon Oct 17, 2022 7:38 pm
Location: Europe, Germany

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby MicroController » Sat Dec 20, 2025 8:49 pm

Power supply issue maybe? Where does the +3V3 come from? Anything else in the circuit which may draw too much power from VBUS?

mikemoy
Posts: 687
Joined: Fri Jan 12, 2018 9:10 pm

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby mikemoy » Sun Dec 21, 2025 8:36 am

Did you reboot after the driver install ?
Just curious why you didn't just use the USB pins on the ESP32-S3 and avoid the CH340x all together.

mikemoy
Posts: 687
Joined: Fri Jan 12, 2018 9:10 pm

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby mikemoy » Sun Dec 21, 2025 8:37 am

Did you reboot after the driver install ?
Just curious why you didn't just use the USB pins on the ESP32-S3 and avoid the CH340x all together.

balazspavai
Posts: 6
Joined: Fri Feb 21, 2025 12:00 pm

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby balazspavai » Sun Dec 21, 2025 9:33 am

Power supply issue maybe? Where does the +3V3 come from? Anything else in the circuit which may draw too much power from VBUS?

There would also be a display and a motor connected, but they are not hooked up at the moment.

voltage_regulator.png
voltage_regulator.png (140.89 KiB) Viewed 2375 times

balazspavai
Posts: 6
Joined: Fri Feb 21, 2025 12:00 pm

Re: Windows 11 detects ESP32-S3 as an unknown device (CH340X)

Postby balazspavai » Sun Dec 21, 2025 1:17 pm

Did you reboot after the driver install ?
Just curious why you didn't just use the USB pins on the ESP32-S3 and avoid the CH340x all together.

Yes I did, but not working

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