I had a working PIO config for my new ESP32-C3 module: [env:esp32c3] platform = espressif32 platform_packages = toolchain-riscv-esp framework-arduinoespressif32@https://github.com/espressif/arduino-esp32.git#master platformio/tool-esptoolpy @ ~1.30100 framework = arduino board = esp32dev board_…