The Seeeduino XIAO is an Arduino like board based on the SAMD21G18 chip (ARM Cortex-M0+, 32bit, 48MHz), similar to the Arduino MKR ZERO.

Seeeduino XIAO Wiki

All I/O Pins are 3.3V

To use the DAC and the PWM follow the manual of the Arduino MKR Zero.

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To add Seeeduino XIAO to Arduino IDE add in file/preference the following URL to the Additional Boards Manager URLs:

https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json

Than search and install in tools/boardmanager these boards:

Seeed SAMD Boards

On Arch Linux it needs always two attempts to upload the code, the /dev/ttyACM0 can't be opened: No device found on ttyACM0!

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TX  - pin 06
RX  - pin 07
DAC - pin 00
Build In LED - 13

pinout diagram by Seeed Studio

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To reset the board one should short out the reset pins.
And to enter the bootloader mode one should short them out twice.

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How to unbrick a dead XIAO using Raspberry Pi

XIAO-M0 Bootloader

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This manuals is made by Wolfgang Spahn 2020.
Except where otherwise noted, content on this wiki is licensed under the following license: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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