39 lines
984 B
Markdown
39 lines
984 B
Markdown
# Set Group
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Make a program have the group ID you tell it for sending and receiving
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with ``radio``. A group is like a cable channel (a micro:bit can only
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send or receive in one group at a time). A group ID is like the cable
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channel number.
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If you do not tell your program which group ID to use with this
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function, it will figure out its own group ID by itself. If you load
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the very same program onto two different micro:bits, they will be able
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to talk to each other because they will have the same group ID.
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```sig
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radio.setGroup(0);
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```
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### Parameters
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* ``id`` is a [number](/reference/types/number) from ``0`` to ``255``.
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### Simulator
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This function only works on the micro:bit, not in browsers.
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### Example
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This program makes the group ID equal 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](/reference/radio/receive-number), [send number](/reference/radio/send-number), [on data received](/reference/radio/on-data-received)
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```package
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radio
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``` |