ESP32-C3 non-responsive console over USB serial

[GaryOtt]

This afternoon, I tried to play with an ESP32-C3 for the first time. I took a new and previously unused ESP32-C3-WROOM-O2 from its box and flashed Espruino onto it.

I tried to use a serial connection but found that while I could get serial output from the board, nothing I typed was echoed or responded to.

I was able to get responses using the Web Bluetooth capability of https://www.espruino.com/ide/

Having not used the board before, I wrote a simple Arduino sketch to echo data received by serial connection. The board is fully working.

[SimonGAndrews]

Garry , Hi, the ESP32C3 port has an option to build Espruino for enabling the console on either the Serial RXD/TXD Pins or the USB (JTAG Driver) D+/D- pins. The default build in the Espruino distribution is for the USB Pins.

If you are using the Serial UART you can build a version after a small modification to the board definition file (ESP32C3_IDF4.) The mod is to comment out the definition of DUSB_CDC as seen in this pic (not commented out).

Else you can utilise the USB Pins with the distributed version.

This method is currently subject to a change thats being worked by myself to fix issue #2609 .

Hope this helps. Simon

[GaryOtt]

Thank you for your help, @SimonGAndrews

I will try this.

[gfwilliams]

So you have a link to the board you used?

As @SimonGAndrews says it's set up to work over the on-chip USB by default, but some boards don't connect that and instead have a separate USB-TTL chip - in which case right now those won't work out the box.

[GaryOtt]

Yes, I'm using this Espressif Dev Kit:

https://www.mouser.co.uk/ProductDetail/Espressif-Systems/ESP32-C3-DevKitC-02?qs=stqOd1AaK7%2F1Q62ysr4CMA%3D%3D

[gfwilliams]

Thanks! Yes - I can see the CP2102 chip on there, so that's your problem.

Hopefully the work @SimonGAndrews is doing will sort this out though

[GaryOtt]

Yes, that worked. Thank you both. I'll close this as duplicate.

[SimonGAndrews]

Great news.
I have an Espressif ESP32-C3-Devkitc-02 board and will include in the testing of #2609
Cheers