pxt-calliope/docs/projects/messenger.md

messenger

Use the radio to create an app that sends "YO" messages.

Step 1

Use on button pressed to send the number "0" over radio.

input.onButtonPressed(Button.A, () => {
    radio.sendNumber(0);
});

Step 2

Use radio on data packet received display "YO" when the number 0 is received by radio.

let message = 0;
radio.onDataPacketReceived(({ receivedNumber }) => {
    message = receivedNumber;
    if (message == 0) {
        basic.showString("YO")
    }
})

Download the program and upload the same .hex file to 2 devices!

Step 3

Use on button pressed to send the number "1" over radio.

input.onButtonPressed(Button.B, () => {
    radio.sendNumber(1);
});

Step 4

Add blocks in radio on data packet received to display "BYE" when the number 1 is received by radio.

let message = 0;
radio.onDataPacketReceived(({ receivedNumber }) => {
    message = receivedNumber;
    if (message == 0) {
        basic.showString("YO")
    }
    if (message == 1) {
        basic.showString("BYE")
    }
})

radio