35 lines
1.1 KiB
Markdown
35 lines
1.1 KiB
Markdown
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# Set Group
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Sets the group id for ``radio`` communications. A micro:bit can only listen to one group ID at any time.
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Unless specified, the group id is automatically inferred from the script source. Every script with the same exact source code with start with the same group id.
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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.setGroup(1)
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```
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### Parameters
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* ``id`` -- a [number](/microbit/number) between ``0`` and ``255``.
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### Example
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Sets the group to 128.
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```blocks
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radio.setGroup(128)
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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), [on data received](/microbit/radio/on-data-received)
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