arduino-0022

arduino-0022-linux-x64/libraries/Ethernet/examples/UDPSendReceiveString/UDPSendReceiveString.pde

@@ -0,0 +1,107 @@
+/*
+  UDPSendReceive.pde:
+ This sketch receives UDP message strings, prints them to the serial port
+ and sends an "acknowledge" string back to the sender
+ 
+ A Processing sketch is included at the end of file that can be used to send 
+ and received messages for testing with a computer.
+ 
+ created 21 Aug 2010
+ by Michael Margolis
+ 
+ This code is in the public domain.
+ */
+
+
+#include <SPI.h>         // needed for Arduino versions later than 0018
+#include <Ethernet.h>
+#include <Udp.h>         // UDP library from: bjoern@cs.stanford.edu 12/30/2008
+
+
+// Enter a MAC address and IP address for your controller below.
+// The IP address will be dependent on your local network:
+byte mac[] = {  
+  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
+byte ip[] = { 
+  192,168,1,177 };
+
+unsigned int localPort = 8888;      // local port to listen on
+
+// the next two variables are set when a packet is received
+byte remoteIp[4];        // holds received packet's originating IP
+unsigned int remotePort; // holds received packet's originating port
+
+// buffers for receiving and sending data
+char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
+char  ReplyBuffer[] = "acknowledged";       // a string to send back
+
+
+void setup() {
+  // start the Ethernet and UDP:
+  Ethernet.begin(mac,ip);
+  Udp.begin(localPort);
+
+  Serial.begin(9600);
+}
+
+void loop() {
+  // if there's data available, read a packet
+  int packetSize = Udp.available(); // note that this includes the UDP header
+  if(packetSize)
+  {
+    packetSize = packetSize - 8;      // subtract the 8 byte header
+    Serial.print("Received packet of size ");
+    Serial.println(packetSize);
+
+    // read the packet into packetBufffer and get the senders IP addr and port number
+    Udp.readPacket(packetBuffer,UDP_TX_PACKET_MAX_SIZE, remoteIp, remotePort);
+    Serial.println("Contents:");
+    Serial.println(packetBuffer);
+
+    Udp.sendPacket( ReplyBuffer, remoteIp, remotePort);
+  }
+  delay(10);
+}
+
+
+/*
+  Processing sketch to run with this example
+ =====================================================
+ 
+ // Processing UDP example to send and receive string data from Arduino 
+ // press any key to send the "Hello Arduino" message
+ 
+ 
+ import hypermedia.net.*;
+ 
+ UDP udp;  // define the UDP object
+ 
+ 
+ void setup() {
+ udp = new UDP( this, 6000 );  // create a new datagram connection on port 6000
+ //udp.log( true ); 		// <-- printout the connection activity
+ udp.listen( true );           // and wait for incoming message  
+ }
+ 
+ void draw()
+ {
+ }
+ 
+ void keyPressed() {
+ String ip       = "192.168.1.177";	// the remote IP address
+ int port        = 8888;		// the destination port
+ 
+ udp.send("Hello World", ip, port );   // the message to send
+ 
+ }
+ 
+ void receive( byte[] data ) { 			// <-- default handler
+ //void receive( byte[] data, String ip, int port ) {	// <-- extended handler
+ 
+ for(int i=0; i < data.length; i++) 
+ print(char(data[i]));  
+ println();   
+ }
+ */
+
+