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

1.2 KiB

send Value

Send a string and number together by radio to other @boardname@s. The maximum string length is 8 characters.

radio.sendValue("name", 0);

Parameters

  • name: a string that is the name of the value to send.
  • value: a 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.

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.

radio.setGroup(99)
radio.onReceivedValue(function (name, value) {
	basic.showString(name);
    basic.showNumber(value);
});

See also

on received value

radio