pxt-calliope/docs/reference/radio/send-string.md
2016-05-25 01:53:13 +01:00

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# Send String
Broadcasts a string data packet to other micro:bits connected via ``radio``.
## Important Security Consideration
The functions in the ``radio`` namespace allow the BBC micro:bit to communicate with other micro:bits.
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.
For serious applications, BLE should be considered a substantially more secure alternative.
```sig
radio.sendString("Hello world!")
```
### Parameters
* msg - a string to be transmitted.
### Examples
Broadcasts the provided string to other micro:bits.
```blocks
input.onButtonPressed(Button.A, () => {
radio.sendString("Mr. Watson, come here, I want to see you.")
})
```
### See also
[receive string](/reference/radio/receive-string), [on data received](/reference/radio/on-data-received)