pxt-calliope/docs/reference/devices/receive-number.md

Receive Number

The broadcast function.

Reads the next radio packet as a number data packet.

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.receiveNumber();

Returns

• packet - a number received.

Examples

Broadcasts the value of acceleration x to other micro:bits.

radio.onDataReceived(() => {
    led.plotBarGraph(radio.receiveNumber(), 1023)
})

See also

send number, receive number, on data received, set group