Broadcasting UDP packets

[electrotwelve 3]

My subnet is 255.255.255.0 and my broadcast IP is 192.168.1.255. I'm trying to broadcast UDP packets using this code but I'm not sure its working. When I open my IP and port on SocketTest, I don't see anything on the console. What am I missing?

unsigned int localPort = 2390;
char sendBuffer[] = {"pullingyourhairoutisnotthesolution"};

WiFiUDP BroadcastSendUDP;

void sendBroadcastPacket() { 
  IPAddress sendIP(192, 168, 1, 101);

  int counter = (sizeof(sendBuffer)/sizeof(sendBuffer[0]));

  BroadcastSendUDP.beginPacket(sendIP, localPort);
  for (int i=0; i<counter; i++) {
    BroadcastSendUDP.write(sendBuffer[i]);
  }
  BroadcastSendUDP.endPacket();

  Serial.print("Packet sent: ");
  Serial.println(sendBuffer);
  Serial.println();
}

[SmokinGrunts 5]

Gotta see more code to really know what's going on. 
 
Do you have your UDP object properly initialized? something like:

do { // Detect if we've started the UDP server
    Serial.print("."); // print dots while we wait
    delay(300);
    }
    while(!BroadcastSendUDP.begin(localPort));

Notice that BroadcastSendUDP.beginPacket() will *not* get a socket and bind it to a port for you, you must call begin() first.

 

Relevant snippet for reference:

int WiFiUDP::beginPacket(IPAddress ip, uint16_t port)
{
    //
    //make sure a port has been created
    //!! this doesn't create a port if one doesn't exist. Is that ok? <--------- Look here
    //
    if (_socketIndex == NO_SOCKET_AVAIL) {
        return 0;
    }

...