Build your own MicroPython firmware using docker

Steps

1. Run the docker container

docker run -it --rm -v {your micropython repo dir}:/root/micropython robbietree/esp32-build-docker:0.0.7

2. build MicroPython

cd /root
sh clean-build-esp32.sh

3. find the combined firmware bin

ls /root/micropython/ports/esp32/build-GENERIC_C3/firmware.bin

4. upload to board

esptool.py \
    --chip esp32c3 \
    --port /dev/cu.usbserial-1420 \
    --baud 460800 \
    write_flash --flash_size=detect -fm dio 0 firmware.bin

5. test board

Others

You can refer readme from original repo