Hi there,
I have a problem what is driving me crazy and i can't find any help by searching the internet and this forum for similar troubles.
I have started to write a sketch (most stuff out from tutorials) to receive and send UDP packets to/from my Arduino Due with WiFiShield. The idea is to receive commands from a java-app and perform some actions after receiving a command.
The sketch-code where the problem appears:
void loop() {
// check if UDP Packet is available
int packetSize = Udp.parsePacket();
if(packetSize){
Serial.print("INF: Received packet of size ");
Serial.println(packetSize);
Serial.print("INF: From ");
IPAddress remoteIp = Udp.remoteIP();
Serial.print(remoteIp);
Serial.print(":");
Serial.println(Udp.remotePort());
// read packet into packetBuffer
int len = Udp.read(packetBuffer, 255);
if(len > 0) packetBuffer[len] = 0;
Serial.println(packetBuffer);
// send reply back
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write(ReplyBuffer);
Udp.endPacket();
}
}
here is the output of my serial:
INF: serial connection initialized (9600)
INF: WiFi Shield found
INF: trying to connect to WPA SSID 'DiZZyNet'...
INF: connected to WiFi network 'DiZZyNet'
IP Address: 10.0.0.10
MAC address: 78:C4:E:2:C:6A
INF: started UDP on Port 2390
INF: Received packet of size 2
INF: From
This is where I get struggled. It seems that Udp.parsePacket(); receives a packet of size 2, but cannot resolve the remoteIP.