106 lines
2.8 KiB
Arduino
106 lines
2.8 KiB
Arduino
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/*
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* 31 mar 2015
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* This sketch display UDP packets coming from an UDP client.
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* On a Mac the NC command can be used to send UDP. (nc -u 192.168.1.101 2390).
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*
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* Configuration : Enter the ssid and password of your Wifi AP. Enter the port number your server is listening on.
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*
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13 apr 2015. Partly working. Packets are received and displayed, but the confirmation packet is not received by the client.
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Tested with Mac as client using netcat (nc -u 192.168.1.101 2390)
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*/
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#include <ESP8266WiFi.h>
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#include <WiFiUDP.h>
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int status = WL_IDLE_STATUS;
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const char* ssid = "yourssid"; // your network SSID (name)
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const char* pass = "yourpassword"; // your network password
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unsigned int localPort = 2390; // local port to listen for UDP packets
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byte packetBuffer[512]; //buffer to hold incoming and outgoing packets
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// A UDP instance to let us send and receive packets over UDP
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WiFiUDP Udp;
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// Multicast declarations
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IPAddress ipMulti(239, 0, 0, 57);
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unsigned int portMulti = 12345; // local port to listen on
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void setup()
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{
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// Open serial communications and wait for port to open:
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Serial.begin(115200);
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// setting up Station AP
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WiFi.begin(ssid, pass);
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// Wait for connect to AP
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Serial.print("[Connecting]");
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Serial.print(ssid);
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int tries=0;
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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tries++;
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if (tries > 30){
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break;
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}
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}
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Serial.println();
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printWifiStatus();
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Serial.println("Connected to wifi");
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Serial.print("Udp Multicast server started at : ");
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Serial.print(ipMulti);
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Serial.print(":");
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Serial.println(portMulti);
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Udp.beginMulticast(WiFi.localIP(), ipMulti, portMulti);
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}
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void loop()
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{
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int noBytes = Udp.parsePacket();
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if ( noBytes ) {
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Serial.print(millis() / 1000);
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Serial.print(":Packet of ");
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Serial.print(noBytes);
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Serial.print(" received from ");
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Serial.print(Udp.remoteIP());
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Serial.print(":");
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Serial.println(Udp.remotePort());
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// We've received a packet, read the data from it
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Udp.read(packetBuffer,noBytes); // read the packet into the buffer
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// display the packet contents in HEX
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for (int i=1;i<=noBytes;i++){
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Serial.print(packetBuffer[i-1],HEX);
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if (i % 32 == 0){
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Serial.println();
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}
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else Serial.print(' ');
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} // end for
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Serial.println();
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// send a reply, to the IP address and port that sent us the packet we received
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Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
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Udp.write("UDP packet received");
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Udp.endPacket();
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} // end if
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}
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void printWifiStatus() {
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// print the SSID of the network you're attached to:
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your WiFi shield's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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}
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