Arduino UDP not sending Packets to te right location

Projects General Guidance
1

Hallo,

thanks for trying to help.

Project: Sending some UDP packets to a certain port and Address.

Problem: The Packets are not sent to the address, i assign them to.

Code:

#include <SPI.h>        
#include <Ethernet.h>
#include <EthernetUdp.h>


byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,137,5);
IPAddress udpip(255,255,255,255);
unsigned int localPort = 12345;      // local port to listen on
unsigned int remoteip = 25001;

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;

void setup() {
  // start the Ethernet and UDP:
  Ethernet.begin(mac,ip);
  Udp.begin(localPort);
}

void loop() {
  Udp.beginPacket(udpip, remoteip);
    Udp.write("hello");
    Udp.write("Wert");
    Udp.endPacket();
}

Hardware: Arduino Uno Rev. 3 , Ethernet Shield W550, Windows 8.1

2

This looks strange:

  Udp.beginPacket(udpip, remoteip);

You should be passing an IP and a port here.

3

Wildid,

yes they are declared at the beginning of the code.

4

More details:

With the code above, the packets are not even sent at a continues amount and stop after some time.

But with this code (Adding '255.255.255.255' in the Upd.beginPacket) :

#include <SPI.h>        
#include <Ethernet.h>
#include <EthernetUdp.h>


byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,137,5);
IPAddress udpip(255,255,255,255);
unsigned int localPort = 12345;      // local port to listen on
unsigned int remoteip = 25001;

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;

void setup() {
  // start the Ethernet and UDP:
  Ethernet.begin(mac,ip);
  Udp.begin(localPort);
}

void loop() {
  Udp.beginPacket('255.255.255.255', remoteip);
    Udp.write("hello");
    Udp.write("Wert");
    Udp.endPacket();
}

i get really good UDP messages sent, but it still does not send it to the right address.

5

Andddd,

i solved my issue. I was looking at the wrong connection feed.

Thanks

6

@AKJ, do not cross-post.