Send simple Bluetooth queries to control your MATRIX Voice's LEDs.
How to create a non-contact thermometer with a Feather M0 BLE board and IR temperature sensor together with MIT App Inventor for the app.
This project allows you to configure your micro:bit to work as a Bluetooth Low Energy remote control to control Spotify on macOS.
Turn on a closet light when the door is opened with a pressure sensor that can be placed anywhere in the room.
You can make someone else's sunglasses see-through via BLE and check them out from far away, perhaps with your heartbeat.