pxt-calliope/docs/reference/radio/send-value.md
Juri Wolf 5f7a8e5301
Updates for V4 (#197)
* update yotta defaults for 16kb devices

* refactor deprecated blocks

* updates for button events

* update button events

* update refference

* update docs

* update docs

* update button event blocks

* update docs

* update block id
2022-08-10 09:36:19 -07:00

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# send Value
Send a [string]() and [number]() together by ``radio`` to other @boardname@s.
The maximum [string]() length is 8 characters.
```sig
radio.sendValue("name", 0);
```
## Parameters
* **name**: a [string](/types/string) that is the name of the value to send.
* **value**: a [number](/types/number) that is the value to send.
## ~ hint
Watch this video to see how the radio hardware works on the @boardname@:
https://www.youtube.com/watch?v=Re3H2ISfQE8
## ~
## Example: Broadcasting acceleration
This program sends your @boardname@'s **acceleration** (amount it is
speeding up or slowing down) in the `x` direction (left and right) to
other @boardname@s. This kind of program might be useful in a model car
or model rocket.
```blocks
radio.setGroup(99)
input.onButtonEvent(Button.A, input.buttonEventClick(), () => {
radio.sendValue("acc", input.acceleration(Dimension.X))
})
```
This program receives the string and number sent by the last program.
Then it shows them on the LED screen.
```blocks
radio.setGroup(99)
radio.onReceivedValue(function (name, value) {
basic.showString(name);
basic.showNumber(value);
});
```
## See also
[on received value](/reference/radio/on-received-value)
```package
radio
```