pxt-calliope/docs/reference/radio/set-transmit-serial-number.md
Sam El-Husseini e3975e65e5 pxt-microbit Accessibility PR (#529)
* Accessibility changes
2017-09-07 13:42:08 -07:00

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# Set Transmit Serial Number
Make the ``radio`` packet embed the board serial number with each packet of data.
```sig
radio.setTransmitSerialNumber(true);
```
## Parameters
* ``transmit`` is a [boolean](/types/boolean) that represents whether the serial number needs to be transmitted.
## Example
This program makes the ``radio`` send the serial number in each packet.
```blocks
radio.setTransmitSerialNumber(true);
```
## See also
[on data packet received](/reference/radio/on-data-packet-received),
[send number](/reference/radio/send-number),
[send value](/reference/radio/send-value),
[send string](/reference/radio/send-string)
```package
radio
```