# Adafruit Itsybitsy nRF52840

![](https://1065911005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ftmmq04xl8IrJjV6lZCnr%2Fuploads%2F6bDVeObKCFx3wFVhdP8O%2Fimage.png?alt=media\&token=f6ea69c0-a18f-4589-96b6-49b2433805c7)

Either use the drag and drop UF2 method or more steps involved - Arduino uploading method.\
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For the UF2 method

* Download the UF2 file for the itsybitsy *board in the current release*
* Double click that reset button. You will then get a USB drive on your computer. Drag and drop the UF2 file to the root of that drive.
* It SHOULD disconnect from your pC if successful – but as I say the loghts should change colour to Green
* More details see the steps [here](https://learn.adafruit.com/adafruit-metro-m0-express/uf2-bootloader-details#entering-bootloader-mode-2929745)

Or the Arduino uploading method.

* Check the setup of your [Arduino IDE](https://learn.adafruit.com/bluefruit-nrf52-feather-learning-guide/arduino-bsp-setup) (remember we're using the nRF52840 board!)
* Upload the [sketch](https://github.com/AceCentre/RelayKeys/blob/master/arduino/arduino_nRF52840/arduino_nRF52840.ino) to your feather.
* Run the server side code
* Done!