UDP

sendPacket()

Since 0.4.5:

Sends a packet, unbuffered, to a remote UDP peer.

// SYNTAX
Udp.sendPacket(buffer, bufferSize, remoteIP, remotePort);

// EXAMPLE USAGE
UDP Udp;

char buffer[] = "Particle powered";

IPAddress remoteIP(192, 168, 1, 100);
int port = 1337;

void setup() {
  // Required for two way communication
  Udp.begin(8888);

  if (Udp.sendPacket(buffer, sizeof(buffer), remoteIP, port) < 0) {
    Particle.publish("Error");
  }
}

Parameters:

• pointer (buffer): the buffer of data to send
• int (bufferSize): the number of bytes of data to send
• IPAddress (remoteIP): the destination address of the remote peer
• int (remotePort): the destination port of the remote peer

Returns:

• int: The number of bytes written. Negative value on error.