ESP32 Forum

Hi, I purchased a couple of ESP32-C3 mini modules for a project. The modules are being mounted on PCB board, I tried to flash/program them for the application using a customized board (simplified schematic of esp32-c3 dev-board). The issue is that the system is unable to communicate with the module. I also replaced the module on an esp32-c3-mini dev board with the purchased one but still facing the same issue with the flashing. The question is that:

Whether the esp32-c3 modules, in the market, are required to be pre-programmed prior to the flashing process?

How I can flash the modules?

Any help/comment/guide will be appreciated!

Best Regards,

Mahdi

I just spent quite a bit of time figuring out why I couldn't upload to my own boards, so I appreciate what you're experiencing.
The ESP32-C3-Mini modules do not need to be preprogrammed. You can write firmware to them directly using esptool.py
I programmed mine using the Arduino IDE, which uses esptooly.py under the hood.

If you share what your custom programming board looks like, we might be able to help.