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