You can build your own devices that act like remote keyboards and HID devices for nearly any mobile device or computer with Bluetooth LE and the Adafruit HID library in CircuitPython!
Traditionally, the USB HID library has been used to send keyboard and mouse commands over a USB cable to a computer or mobile device. Now, you can cut that wire and do all the same things using BLE wirelessly!
This tutorial will show one of the many exciting projects you can build with these techniques.
You'll build a wireless volume knob that can turn your sound up and down, mute, and press the play/pause button from across the room to control your mobile device or computer sound!
Plus, we've added Bluetooth LE bonding support, so once you pair your devices, they'll automatically reconnect whenever you turn on the devices.
If you want to build a more permanent volume knob, you can use a Proto Gizmo and solder down the encoder.