41 lines
1.1 KiB
Markdown
41 lines
1.1 KiB
Markdown
# Signal Strength
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The `signal strength` function. #docs #antenna #ble
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Returns the signal strength reported by the paired device from ``0`` (no signal) to ``4`` (full strength).
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## Bluetooth required
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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).
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The set of supported events will depend on the remote device and the BBC micro:bit apps available for the remote device.
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### Block Editor
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### KindScript
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```
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export function signalStrength() : number
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```
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### Returns
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* the signal strength from ``0`` (no signal) to ``4`` (full strength).
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### Examples
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Display the signal strength on screen:
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```
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devices.onSignalStrengthChanged(() => {
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basic.showNumber(devices.signalStrength(), 150)
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})
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```
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### See Also
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[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), [on signal strength changed](/microbit/reference/devices/on-signal-strength-changed)
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