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

Send Number

Broadcasts a number data packet to other micro:bits connected via radio.

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.sendNumber(0)

Parameters

• packet - a number to be transmitted.

Examples

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

input.onButtonPressed(Button.A, () => {
    radio.sendNumber(input.acceleration(Dimension.X))
})

See also

receive number, on data received