This guide assumes you've set up the Adafruit Bluefruit nRF52 Board Support Package.

Before proceeding with the code in this guide, you should be able to run the blinky sketch from the Arduino IDE. 

Make sure your board is selected:

  • Go to the Tools menu
  • Select Tools > Board > Adafruit Bluefruit nRF52840 Feather Express 

Copy the code below to the Arduino IDE. Click verify. Then, click Upload.

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After you've successfully uploaded the code to your Feather, toggle the switch to turn the power on. The blue LED labeled CONN should blink. 

This guide was first published on Apr 07, 2020. It was last updated on Apr 07, 2020.

This page (Arduino Code) was last updated on Dec 03, 2021.

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