110 lines
2.9 KiB
Arduino
110 lines
2.9 KiB
Arduino
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/*
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WiFiEsp example: WiFi UDP Send and Receive String
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This sketch wait an UDP packet on localPort using a WiFi shield.
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When a packet is received an 'ACK' packet is sent to the client on port remotePort.
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For more details see: http://yaab-arduino.blogspot.com/p/wifiesp-example-client.html
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*/
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#include <WiFiEsp.h>
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#include <WiFiEspUdp.h>
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// Emulate Serial1 on pins 6/7 if not present
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#ifndef HAVE_HWSERIAL1
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#include "SoftwareSerial.h"
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SoftwareSerial Serial1(6, 7); // RX, TX
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#endif
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char ssid[] = "Twim"; // your network SSID (name)
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char pass[] = "12345678"; // your network password
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int status = WL_IDLE_STATUS; // the Wifi radio's status
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unsigned int localPort = 10002; // local port to listen on
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char packetBuffer[255]; // buffer to hold incoming packet
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char ReplyBuffer[] = "ACK"; // a string to send back
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WiFiEspUDP Udp;
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void setup() {
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// initialize serial for debugging
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Serial.begin(115200);
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// initialize serial for ESP module
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Serial1.begin(9600);
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// initialize ESP module
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WiFi.init(&Serial1);
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// check for the presence of the shield:
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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// don't continue:
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while (true);
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}
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// attempt to connect to WiFi network
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while ( status != WL_CONNECTED) {
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Serial.print("Attempting to connect to WPA SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network
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status = WiFi.begin(ssid, pass);
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}
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Serial.println("Connected to wifi");
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printWifiStatus();
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Serial.println("\nStarting connection to server...");
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// if you get a connection, report back via serial:
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Udp.begin(localPort);
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Serial.print("Listening on port ");
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Serial.println(localPort);
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}
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void loop() {
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// if there's data available, read a packet
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int packetSize = Udp.parsePacket();
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if (packetSize) {
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Serial.print("Received packet of size ");
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Serial.println(packetSize);
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Serial.print("From ");
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IPAddress remoteIp = Udp.remoteIP();
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Serial.print(remoteIp);
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Serial.print(", port ");
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Serial.println(Udp.remotePort());
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// read the packet into packetBufffer
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int len = Udp.read(packetBuffer, 255);
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if (len > 0) {
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packetBuffer[len] = 0;
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}
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Serial.println("Contents:");
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Serial.println(packetBuffer);
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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(ReplyBuffer);
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Udp.endPacket();
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}
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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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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print("signal strength (RSSI):");
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Serial.print(rssi);
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Serial.println(" dBm");
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}
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