pxt-calliope/docs/reference/radio/send-string.md

50 lines
1.0 KiB
Markdown
Raw Normal View History

# send String
2016-05-25 02:53:13 +02:00
2016-11-02 01:44:37 +01:00
Sends a string to other @boardname@s in the area connected by radio. The
maximum string length is 19 characters.
2016-05-25 02:53:13 +02:00
```sig
radio.sendString("hi!")
2016-05-25 02:53:13 +02:00
```
## Parameters
2016-05-25 02:53:13 +02:00
* **msg**: a [string](/types/string) to send by radio.
2016-05-25 02:53:13 +02:00
## ~ hint
2016-06-10 00:30:47 +02:00
Watch this video to see how the radio hardware works on the @boardname@:
https://www.youtube.com/watch?v=Re3H2ISfQE8
## ~
## Example: Two-way radio
2016-05-25 02:53:13 +02:00
2016-11-02 01:44:37 +01:00
If you load this program onto two or more @boardname@s, you can send a
2016-07-18 23:04:15 +02:00
code word from one of them to the others by pressing button `A`. The
2016-11-02 01:44:37 +01:00
other @boardname@s will receive the code word and then show it.
2016-05-25 02:53:13 +02:00
```blocks
input.onButtonEvent(Button.A, ButtonEvent.Click, () => {
radio.sendString("Codeword: TRIMARAN")
basic.showString("SENT");
2016-05-25 02:53:13 +02:00
})
radio.onReceivedString(function (receivedString) {
basic.showString(receivedString);
})
2016-05-25 02:53:13 +02:00
```
## ~hint
A radio that can both transmit and receive is called a _transceiver_.
## ~
## See also
2016-05-25 02:53:13 +02:00
[on received string](/reference/radio/on-received-string)
```package
radio
```