PlatformIO documentation:
Espressif ESP32-C3-DevKitM-1 does not have on-board debug probe and IS NOT READY for debugging. You will need to use/buy one of external probe listed below."
Actually, the ESP32-C3-DevKitM-1 has a built-in USB debugger. Wire in a USB breakout such as Digi-Key 1568-1958-ND per the diagram
GPIO18 D-
GPIO19 D+
VCC and GND.
This works on Ubuntu 20, VSCode and manually installing the Espressif tools.
Actually, I’m not sure how is works. Flash, openocd debug and all.
But not with PlatformIO