44 lines
1.1 KiB
Markdown
44 lines
1.1 KiB
Markdown
# Set Transmit Power
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Make the ``radio`` signal of the micro:bit stronger or weaker.
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It can be as weak as `0` and as strong as `7`.
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The scientific name for the strength of the ``radio`` signal is
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**dBm**, or **decibel-milliwatts**. A signal strength of `0`
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can be measured as -30 dBm, and a strength of `7` can be
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measured as +4 dBm.
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```sig
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radio.setTransmitPower(7);
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```
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### Range
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If your micro:bit is sending with a strength of `7`, and you are in
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an open area without many other computers around, the micro:bit signal
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can reach as far as 70 meters (about 230 feet).
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### Parameters
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* ``power`` is a [number](/reference/types/number) between ``0`` and ``7`` that
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means how strong the signal is.
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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 ``radio`` send at full strength.
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```blocks
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radio.setTransmitPower(7)
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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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microbit-radio
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``` |