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59 lines
1.6 KiB
Plaintext
Executable File
59 lines
1.6 KiB
Plaintext
Executable File
#include <Ethernet.h>
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#include <UdpString.h>
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#include <WString.h>
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/* UdpReceiveString.pde: Example how to receive packets over UDP using the UdpString library
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* prints received packet to serial port
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* bjoern@cs.stanford.edu 12/30/2008
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*/
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/* ETHERNET SHIELD CONFIGURATION
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* set MAC, IP address of Ethernet shield, its gateway,
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* and local port to listen on for incoming packets
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*/
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byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; // MAC address to use
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byte ip[] = { 192, 168, 11, 200 }; // Arduino's IP address
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byte gw[] = { 192, 168, 11, 1 }; // Gateway IP address
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int localPort = 8888; // local port to listen on
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String packet(32); //packet can be max 32 bytes long
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byte remoteIp[4]; // holds recvieved packet's originating IP
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unsigned int remotePort[1]; // holds received packet's originating port
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int i;
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/* SETUP: init Ethernet shield, start UDP listening, open serial port */
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void setup() {
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Ethernet.begin(mac,ip,gw);
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UdpString.begin(localPort);
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Serial.begin(38400);
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}
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/* LOOP: wait for incoming packets and print each packet to the serial port */
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void loop() {
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// if there's data available, read a packet
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if(UdpString.available()) {
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int packetSize = UdpString.readPacket(packet,remoteIp,remotePort);
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Serial.print("Received packet of size ");
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Serial.println(packetSize);
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Serial.print("From IP ");
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for(i=0; i<3; i++) {
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Serial.print(remoteIp[i],DEC);
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Serial.print(".");
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}
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Serial.print(remoteIp[3],DEC);
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Serial.print(" Port ");
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Serial.println(remotePort[0]);
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Serial.println("Contents:");
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Serial.println(packet);
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}
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//wait a bit
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delay(10);
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}
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