XIAO ESP32S3

This firmware works on both the Seeed Studio XIAO ESP32S3 and the XIAO ESP32S3 Plus.

The Plus variant has 16MiB of flash (versus 8MiB on the standard board) and exposes additional GPIO pins (D11-D19). The flash size is auto-detected and the extra pins are included in the pin definitions, so the same firmware runs on both boards.

For more information see the Seeed Studio XIAO ESP32S3 wiki.

Installation instructions

Program your board using the esptool.py program, found here.

Windows users: You may find the installed program is called esptool instead of esptool.py.

Erasing

If you are putting MicroPython on your board for the first time then you should first erase the entire flash using:

esptool.py erase_flash

esptool.py will try to detect the serial port with the ESP32 automatically, but if this fails or there might be more than one Espressif-based device attached to your computer then pass the --port option with the name of the target serial port. For example:

esptool.py --port PORTNAME erase_flash

• On Linux, the port name is usually similar to /dev/ttyACM0.
• On Mac, the port name is usually similar to /dev/cu.usbmodem01.
• On Windows, the port name is usually similar to COM4.

Flashing

Then deploy the firmware to the board, starting at address 0:

esptool.py write_flash 0 ESP32_BOARD_NAME-DATE-VERSION.bin

Replace ESP32_BOARD_NAME-DATE-VERSION.bin with the .bin file downloaded from this page.

As above, if esptool.py can't automatically detect the serial port then you can pass it explicitly on the command line instead. For example:

esptool.py --port PORTNAME write_flash 0 ESP32_BOARD_NAME-DATE-VERSION.bin

Troubleshooting

If these steps don't work, consult the MicroPython ESP32 Troubleshooting steps and the esptool documentation.

Important: From the options below, download the .bin file for your board.

Firmware

Preview builds

These are automatic builds of the development branch for the next release.