An Arduino shield-compatible breakout board for the ATSAMD21G18. Battery-power enabled, with an onboard LiPo charger.
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SparkFun SAMD21 Dev Breakout

SparkFun SAMD21 Dev Breakout

SparkFun SAMD21 Dev Breakout (DEV-13672)

The SAMD21 Dev Breakout is an Arduino-sized breakout for the Atmel ATSAMD21G18, a 32-bit ARM Cortex-M0+ processor with 256KB flash, 32KB SRAM, and an operating speed of up to 48MHz. The SAMD21 is compatible with the Arduino IDE, and libraries for the Arduino Zero.

Repository Contents

  • /Documentation - Data sheets, additional product information
  • /Firmware - SAM_BA SAMD21 Bootloader
  • /Hardware - Eagle design files (.brd, .sch)
  • /Production - Production panel files (.brd)


  • Hookup Guide - Basic hookup guide for the SAMD21 Dev Breakout.

Product Versions

  • DEV-13672 - Initial product release - v10.
  • DEV-13672 - The SparkFun SAMD21 Mini Breakout -- a similar, Arduino-shaped version of this board.

Version History

  • v1.0 - Initial release

License Information

This product is open source!

Please review the file for license information.

If you have any questions or concerns on licensing, please contact

Distributed as-is; no warranty is given.

  • Your friends at SparkFun.