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Easy Installation

  1. Get a Seeeduino XIAO SAMD21
  2. Download the most recent XIAO SAMD21 firmware from releases
  3. Enter bootloader mode
  4. Copy the firmware onto the XIAO SAMD21

Wideo walkthrough of firmware upload (3:07)

If you would like to use a different microcontroller, see the advanced install instructions.


XIAO Pinout

  • GND: Ground (usually in the middle of the paddle)
  • Pin D2: Dit (usually left paddle)
  • Pin D1: Dah (usually right paddle)

If you'd like to wire up a TRS (headphone) jack; or take advantage of some of the adapters other features, such as dedicated straight key, sidetone generation, or capacative touch, see the advanced install instructions.