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docs/reference/devices/on-signal-strength-changed.md

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+# On Signal Strength Changed
+
+The `on signal strength changed` function. #docs #devices #ble
+
+Register code to run when the signal strength of the paired device changes.
+
+## Bluetooth required
+
+The functions in the ``devices`` namespace allow the BBC micro:bit to communicate with a separate (remote) device, such as a smartphone, over Bluetooth (Smart).
+
+The set of supported events will depend on the remote device and the BBC micro:bit apps available for the remote device.
+
+### Block Editor
+
+![](/static/mb/on-signal-strength-changed-0.png)
+
+### KindScript
+
+```
+export function onSignalStrengthChanged(body:td.Action)
+```
+
+### Parameters
+
+* ``body``: code to run when the signal strength changes.
+
+### Examples
+
+Display the signal strength on screen:
+
+```
+devices.onSignalStrengthChanged(() => {
+    basic.showNumber(devices.signalStrength(), 150)
+})
+```
+
+### See Also
+
+[tell remote control to](/microbit/reference/devices/tell-remote-control-to), [raise alert to](/microbit/reference/devices/raise-alert-to), [on notified](/microbit/reference/devices/on-notified), [signal strength](/microbit/reference/devices/signal-strength)
+