2.1 KiB
Micro Chat
Introduction @unplugged
Use the radio to send and receive messages with other @boardname@.
Sending a message @fullscreen
Use ||input:on button pressed|| to send a number over radio with ||radio:send string||.
All @boardname@ nearby will receive this message.
You can also add ||basic:show icon|| and ||basic:clear screen|| blocks to show a little animation when the message is sent.
input.onButtonPressed(Button.A, () => {
radio.sendString("Yo");
basic.showIcon(IconNames.Chessboard)
basic.clearScreen();
});
Receiving a message @fullscreen
Add a ||radio:on received number|| block to run when a message is received.
radio.onReceivedString(function (receivedString) {
})
Displaying text @fullscreen
Add a ||basic:show string|| to display the string on the screen. You will find the receivedString variable
under the Variables toolbox.
radio.onReceivedString(function (receivedString) {
basic.showString(receivedString);
})
Testing in the simulator @fullscreen
Press button A on the simulator, you will notice that a second @boardname@ appears (if your screen is too small, this might not happen). Try pressing A again and notice that the "Yo" message gets displayed on the other @boardname@
input.onButtonPressed(Button.A, () => {
radio.sendString("Yo");
basic.showIcon(IconNames.Chessboard)
basic.clearScreen();
});
radio.onReceivedString(function (receivedString) {
basic.showString(receivedString);
})
Try it for real @fullscreen
If you have @boardname@s, download the program to two @boardname@. Press button A on one and see if the other gets a message.
Groups @fullscreen
Use the ||radio:set group|| block to assign a group number to your program. You will only receive messages from @boardname@ within the same group. Use this to avoid receiving messages from all the other @boardname@.
/**
* Pick a unique group in your classroom!
*/
radio.setGroup(123)
radio