Great thanks for the helpful reply! Ok its good to know it should look like a dev board to the PC. Yes I was planning something similar, with a bed of nails on the test jig and an array of pads on the DUT. I presume you have 3V3, GND, U0TXD, U0RXD, EN and GPIO9 on your connector? Your reply gives me...

Hi I want to experiment with the ESP32-C3 module on my own board design, I have copied the circuit from the ESP32-C3-DevKitC-02 schematic as a start. I have included the USB to UART IC, regulator etc. Is there any firmware that ships in the ESP32-C3-DevKitC-02 module already that would make it diffe...

The LED is a digitally controlled device that you write bits to to set the colors. Datasheet Here.
There is also an Arduino library on GitHub for it (or a similar unit) here.