| /* | |
| UDPSendReceiveString: | |
| 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. | |
| */ | |
| // 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); | |
| 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 | |
| // An EthernetUDP instance to let us send and receive packets over UDP | |
| EthernetUDP Udp; | |
| void setup() { | |
| // You can use Ethernet.init(pin) to configure the CS pin | |
| //Ethernet.init(10); // Most Arduino shields | |
| //Ethernet.init(5); // MKR ETH shield | |
| //Ethernet.init(0); // Teensy 2.0 | |
| //Ethernet.init(20); // Teensy++ 2.0 | |
| //Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet | |
| //Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet | |
| // start the Ethernet | |
| Ethernet.begin(mac, ip); | |
| // Open serial communications and wait for port to open: | |
| Serial.begin(9600); | |
| while (!Serial) { | |
| ; // wait for serial port to connect. Needed for native USB port only | |
| } | |
| // Check for Ethernet hardware present | |
| if (Ethernet.hardwareStatus() == EthernetNoHardware) { | |
| Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); | |
| while (true) { | |
| delay(1); // do nothing, no point running without Ethernet hardware | |
| } | |
| } | |
| if (Ethernet.linkStatus() == LinkOFF) { | |
| Serial.println("Ethernet cable is not connected."); | |
| } | |
| // start UDP | |
| Udp.begin(localPort); | |
| } | |
| void loop() { | |
| // if there's data available, read a packet | |
| int packetSize = Udp.parsePacket(); | |
| 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++) { | |
| Serial.print(remote[i], DEC); | |
| if (i < 3) { | |
| Serial.print("."); | |
| } | |
| } | |
| Serial.print(", port "); | |
| Serial.println(Udp.remotePort()); | |
| // read the packet into packetBufffer | |
| Udp.read(packetBuffer, UDP_TX_PACKET_MAX_SIZE); | |
| Serial.println("Contents:"); | |
| Serial.println(packetBuffer); | |
| // send a reply to the IP address and port that sent us the packet we received | |
| Udp.beginPacket(Udp.remoteIP(), Udp.remotePort()); | |
| Udp.write(ReplyBuffer); | |
| Udp.endPacket(); | |
| } | |
| 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(); | |
| } | |
| */ | |