34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
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# On Bluetooth Disconnected
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For another device like a smartphone to use any of the Bluetooth "services" which the micro:bit has, it must first connect to the micro:bit. This block starts an [event handler](/reference/event-handler) which in this case will run when a device which is connected to your micro:bit over Bluetooth disconnects.
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You could use this event handler to display a letter "D" on the micro:bit LED grid so you know that the Bluetooth connection has been closed.
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~~~~sig
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bluetooth.onBluetoothDisconnected(() => {
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});
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~~~~
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### Example: Displaying "D" when a Bluetooth connection to the micro:bit is closed
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~~~~blocks
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bluetooth.onBluetoothDisconnected(() => {
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basic.showString("D");
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});
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~~~~
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### Video - on Bluetooth disconnected
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[](
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http://www.youtube.com/watch?v=HyBcsD9Eh6I "Click to launch YouTube video"
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)
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### See also
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[Bluetooth SIG](https://www.bluetooth.com)
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[Bluetooth on micro:bit resources](http://bluetooth-mdw.blogspot.co.uk/p/bbc-microbit.html)
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