SparkFun SAMD51 Thing Plus


Platform Atmel SAM: Atmel | SMART offers Flash- based ARM products based on the ARM Cortex-M0+, Cortex-M3 and Cortex-M4 architectures, ranging from 8KB to 2MB of Flash including a rich peripheral and feature mix.

Microcontroller SAMD51J20A
Frequency 120MHz
Flash 496KB
Vendor SparkFun


Please use sparkfun_samd51_thing_plus ID for board option in “platformio.ini” (Project Configuration File):

platform = atmelsam
board = sparkfun_samd51_thing_plus

You can override default SparkFun SAMD51 Thing Plus settings per build environment using board_*** option, where *** is a JSON object path from board manifest sparkfun_samd51_thing_plus.json. For example, board_build.mcu, board_build.f_cpu, etc.

platform = atmelsam
board = sparkfun_samd51_thing_plus

; change microcontroller
board_build.mcu = samd51j20a

; change MCU frequency
board_build.f_cpu = 120000000L


SparkFun SAMD51 Thing Plus supports the next uploading protocols:

  • atmel-ice
  • jlink
  • sam-ba

Default protocol is sam-ba

You can change upload protocol using upload_protocol option:

platform = atmelsam
board = sparkfun_samd51_thing_plus

upload_protocol = sam-ba


Debugging - “1-click” solution for debugging with a zero configuration.


You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

SparkFun SAMD51 Thing Plus does not have on-board debug probe and IS NOT READY for debugging. You will need to use/buy one of external probe listed below.

Compatible Tools On-board Default
Atmel-ICE   Yes


Name Description
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