For another device like a smartphone to use any of the Bluetooth “services” which the Calliope mini has, it must first be paired with the Calliope mini. Once paired, the other device may connect to the Calliope mini and exchange data relating to many of the Calliope mini’s features.
This block starts an event handler which in this case will run when a device which is connected to your Calliope mini over Bluetooth disconnects.
You could use this event handler to display a letter “D” on the Calliope mini LED grid so you know that the Bluetooth connection has been closed.
bluetooth.onBluetoothDisconnected(() => {
});bluetooth.onBluetoothDisconnected(() => {
basic.showString("D");
});About Bluetooth, Calliope mini Bluetooth profile overview , Calliope mini Bluetooth profile reference, Bluetooth on Calliope mini resources, Bluetooth SIG
bluetooth