Flashing firmware

Web flasher

If your browser supports WebUSB (desktop Google Chrome, Microsoft Edge, recent versions of Brave) you can use the web flasher provided below to install the firmware.

Connect your board to this PC via USB, select a firmware release, and click the button to begin flashing. You will be prompted to choose an appropriate serial port.

Loading flasher…

Manual flashing

The firmware can be also manually flashed using the esptool. It's available in Linux repositories and as a Windows executable. The pre-built firmware can be downloaded from the Releases page of the GitHub repository (download the uni-gtw-[...].zip file, not the source code).

After unpacking the archive you should run one of the following commands, depending on the chip you are using:

esptool.py --chip esp32 --port [PORT] write-flash @flash_args-esp32
# ...or...
esptool.py --chip esp32s3 --port [PORT] write-flash @flash_args-esp32s3
# ...or...
esptool.py --chip esp32c3 --port [PORT] write-flash @flash_args-esp32c3

Replace [PORT] with the serial port of your device (for example COM3, /dev/ttyACM0).