36 lines
998 B
Markdown
36 lines
998 B
Markdown
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# On Data Received
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Registers code to run when a packet is received over ``radio``.
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## Important Security Consideration
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The functions in the ``radio`` namespace allow the BBC micro:bit to communicate with other micro:bits.
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This API does not contain any form of encryption, authentication or authorization. It's purpose is solely for use as a teaching aid to demonstrate how simple communications operates, and to provide a sandpit through which learning can take place.
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For serious applications, BLE should be considered a substantially more secure alternative.
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```sig
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radio.onDataReceived(() => {})
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```
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### Parameters
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* body - is an action
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### Example
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```blocks
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basic.forever(() => {
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radio.sendNumber(input.acceleration(Dimension.X));
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})
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radio.onDataReceived(() => {
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led.plotBarGraph(radio.receiveNumber(), 1023);
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})
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```
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### See also
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[receive number](/microbit/radio/receive-number), [send number](/microbit/radio/send-number), [set group](/microbit/reference/radio/set-group)
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