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From the Forums: Bluetooth Keyboard/Mouse for nRF52840 #Bluetooth #Adafruit @Adafruit @NordicTweets ‏

Adafruit Forums user willwade posts about RelayKeys which allows a computer to mimic a Bluetooth Keyboard (& Mouse).

Using some hardware (a couple of different options currently) and a piece of software running on the ‘Server’ machine – any devices which support Bluetooth LE HID can then receive the keystrokes.

With a LOT of help from @bbx10 and others on this forum we have got a pretty full functioning windows app and RPC server which allows you to use a nrf52840 express as a Bluetooth Keyboard/Mouse emulator.

We have a command line application and the beginnings of a Windowed application for sending keystrokes from one device to another. Our main reason for doing this is to allow individuals we support (such as Mark who have to operate one computer with a dedicated access solution to access another machine; work computer for example. But – we know others want to do the same thing for other reasons (for example as a replacement to Synergy, or a Wireless KVM).

We would LOVE to try and iron out the bugs (e.g. keyboard layouts) and add a windowed application to track mouse movements to send that over to the feather..(pop your issues here: So if you want to help out please do. Code is currently in Python.

(Hastily written) Docs: … ction.html
Credits: … edits.html (I also must give credit to Harold Pimental who we have stolen the name from the original RelayKeys project from:

Thanks Adafruit for creating a awesome board – and community 🙂

I meant to add that the Arduino code is pretty much the example code from adafruit but we’ve added mouse commands. It could replace the standard example code … F52840.ino

See the excellent GitHub repository for a great deal more information and code, all MIT License. Super work!

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