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commit 30a3a4dfc8c53d31044c29f51f22628c074c9a49 1 parent d04cd5c
@holla2040 holla2040 authored
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69 libraries/Ethernet/examples/UDPSendReceiveString/UDPSendReceiveString.ino
@@ -1,34 +1,38 @@
-/*
- UDPSendReceive.pde:
+/*
+ UDPSendReceive.ino
+
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.
+ and received messages for testing with a computer.
+
+ Here's using netcat to send udp
+ echo -n "foo" | nc -4u -q1 192.168.1.177 8888
created 21 Aug 2010
by Michael Margolis
+
+ modified 24 Feb 2014
+ by Craig Hollabaugh
This code is in the public domain.
- */
+*/
-#include <SPI.h> // needed for Arduino versions later than 0018
#include <Ethernet.h>
#include <EthernetUdp.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 };
-IPAddress ip(192, 168, 1, 177);
+byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
+IPAddress ip(192,168,1,177);
unsigned int localPort = 8888; // local port to listen on
// 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
+char ReplyBuffer[] = "acknowledged\n"; // a string to send back
// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
@@ -39,22 +43,24 @@ void setup() {
Udp.begin(localPort);
Serial.begin(9600);
+ Serial.println("UDPSendReceiveString setup");
+ Serial.print("listening on ");
+ ip.printTo(Serial);
+ Serial.print(":");
+ Serial.println(localPort);
}
void loop() {
// if there's data available, read a packet
int packetSize = Udp.parsePacket();
- if(packetSize)
- {
+ if(packetSize) {
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remote = Udp.remoteIP();
- for (int i =0; i < 4; i++)
- {
+ for (int i =0; i < 4; i++) {
Serial.print(remote[i], DEC);
- if (i < 3)
- {
+ if (i < 3) {
Serial.print(".");
}
}
@@ -87,31 +93,28 @@ void loop() {
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
+ 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 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
-
+ 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();
+ //void receive( byte[] data, String ip, int port ) { // <-- extended handler
+
+ for(int i=0; i < data.length; i++)
+ print(char(data[i]));
+ println();
}
*/

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