Sending UDP packet with ESP32 - arduino-ide

Question

I'm trying to send a UDP packet to my Milights (wifi LED bulbs via bridge) to controll them. The packets do not show up in Wireshark though.
When I change the destination ip of the UDP packet to the one of my PC then it works. I can find the packet in Wireshark then.
/*
* This sketch sends random data over UDP on a ESP32 device
*
*/
#include <WiFi.h>
#include <WiFiUdp.h>
// WiFi network name and password:
const char * networkName = "********";
const char * networkPswd = "********";
//IP address to send UDP data to:
// either use the ip address of the server or
// a network broadcast address
const char * udpAddress = "********";
const int udpPort = ********;
//Are we currently connected?
boolean connected = false;
//The udp library class
WiFiUDP udp;
byte command[27] = {0x20, 0x00, 0x00, 0x00, 0x16, 0x02, 0x62, 0x3A, 0xD5, 0xED, 0xA3, 0x01, 0xAE, 0x08, 0x2D, 0x46, 0x61, 0x41, 0xA7, 0xF6, 0xDC, 0xAF, 0xD3, 0xE6, 0x00, 0x00, 0x1E};
void setup(){
// Initilize hardware serial:
Serial.begin(115200);
//Connect to the WiFi network
connectToWiFi(networkName, networkPswd);
}
void loop(){
//only send data when connected
if(connected){
//Send a packet
udp.beginPacket(udpAddress,udpPort);
udp.write(command, 27);
udp.endPacket();
}
//Wait for 1 second
delay(1000);
}
void connectToWiFi(const char * ssid, const char * pwd){
Serial.println("Connecting to WiFi network: " + String(ssid));
// delete old config
WiFi.disconnect(true);
//register event handler
WiFi.onEvent(WiFiEvent);
//Initiate connection
WiFi.begin(ssid, pwd);
Serial.println("Waiting for WIFI connection...");
}
//wifi event handler
void WiFiEvent(WiFiEvent_t event){
switch(event) {
case SYSTEM_EVENT_STA_GOT_IP:
//When connected set
Serial.print("WiFi connected! IP address: ");
Serial.println(WiFi.localIP());
//initializes the UDP state
//This initializes the transfer buffer
udp.begin(WiFi.localIP(),udpPort);
connected = true;
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
Serial.println("WiFi lost connection");
connected = false;
break;
}
}
Can somebody explain to me why I CAN send messages UDP packets to my PC and not to my Wifi bridge?