On Data Packet Received

Run part of a program when the Calliope mini receives a number or string over radio.

radio.onDataPacketReceived(({receivedNumber, receivedString, time, serial, signal}) => { });

Callback Parameters

• packet - the packet that was received by the radio. The packet has the following properties:
  • receivedNumber - The number that was sent in this packet or 0 if this packet did not contain a number. See send number and send value
  • receivedString - The string that was sent in this packet or the empty string if this packet did not contain a string. See send string and send value
  • time - The system time of the Calliope mini that sent this packet at the time the packet was sent.
  • serial - The serial number of the Calliope mini that sent this packet or 0 if the Calliope mini did not include its serial number.
  • signal - How strong the radio signal is from 255 (weak) to 0 (strong).

Example

This program keeps sending numbers that says how fast the Calliope mini is slowing down or speeding up. It also receives numbers for the same thing from nearby Calliope minis. It shows these numbers as a bar graph.

basic.forever(() => {
    radio.sendNumber(input.acceleration(Dimension.X));
})
radio.onDataPacketReceived(({ receivedNumber }) => {
    led.plotBarGraph(receivedNumber, 1023);
})

See also

send number, send string, send value, set group

radio