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

send String

Sends a string to other @boardname@s in the area connected by radio. The maximum string length is 19 characters.

radio.sendString("hi!")

Parameters

• msg: a string to send by radio.

~ hint

Watch this video to see how the radio hardware works on the @boardname@:

https://www.youtube.com/watch?v=Re3H2ISfQE8

~

Example: Two-way radio

If you load this program onto two or more @boardname@s, you can send a code word from one of them to the others by pressing button A. The other @boardname@s will receive the code word and then show it.

input.input.onButtonEvent(Button.A, DAL.MICROBIT_BUTTON_EVT_CLICK, () => {
    radio.sendString("Codeword: TRIMARAN")
    basic.showString("SENT");
})
radio.onReceivedString(function (receivedString) {
    basic.showString(receivedString);
})

~hint

A radio that can both transmit and receive is called a transceiver.

~

See also

on received string

radio