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ESP32-C3-MINI-H4 USB to UART not working

Posted: Tue Sep 17, 2024 5:25 pm
by Sophi9999
Hello!
I designed a board with a ESP32-C3-MINI-1-H4 and a USB to UART connection to use Arduino.
My board isn't recognized by USB and I wondered where things might be wrong.

Image

I have switches to EN (pin 8) and to GPIO9
GPIO8 measures HIGH
GPIO2 measures HIGH
GPIO9 measures HIGH and switches LOW
ESP_EN measures HIGH and switches LOW

The ESP32 measures a solid 3.3V.
Thanks in advance!

Re: ESP32-C3-MINI-H4 USB to UART not working

Posted: Wed Sep 18, 2024 12:19 am
by ESP_Sprite
You should short DN+ with DN2+ and DN- with DN2- otherwise your USB-C connection only works one way around; have you tried flipping it to see if it works then?

(Btw, according to the USB specs, an USB-C connector should have its shield connected directly to ground; R4/C2 are not needed.)

Re: ESP32-C3-MINI-H4 USB to UART not working

Posted: Wed Sep 18, 2024 3:24 am
by Sophi9999
Turning over the cable worked!
Thanks @sprite and also for the USB spec info.