1.7 KiB
1.7 KiB
Receive String
Reads the next radio packet if any and returns the first string.
Important Security Consideration
The functions in the radio namespace allow the BBC micro:bit to communicate with other micro:bits.
This API does not contain any form of encryption, authentication or authorization. It's purpose is solely for use as a teaching aid to demonstrate how simple communications operates, and to provide a sandpit through which learning can take place.
For serious applications, BLE should be considered a substantially more secure alternative.
radio.receiveString()
Return value
- the first string of the packet if any.
""otherwise.
Examples
Read the string broadcasted by other micro:bits and display it.
radio.onDataReceived(() => {
basic.showString(radio.receiveString());
});
A simple program to send whether you are happy, or sad over radio, using the A or B button to select an emotion.
let data: string = "";
input.onButtonPressed(Button.A, () => {
radio.sendString("H");
});
input.onButtonPressed(Button.B, () => {
radio.sendString("S");
});
radio.onDataReceived(() => {
data = radio.receiveString();
if ("H" == data) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
# . . . #
. # # # .
`);
} else if ("S" == data) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
. # # # .
# . . . #
`);
} else {
basic.showString("?");
}
});