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+/*
+ WiFi Web Server LED Blink
+
+ A simple web server that lets you blink an LED via the web.
+ This sketch will print the IP address of your WiFi Shield (once connected)
+ to the Serial monitor. From there, you can open that address in a web browser
+ to turn on and off the LED on pin 9.
+
+ If the IP address of your shield is yourAddress:
+ http://yourAddress/H turns the LED on
+ http://yourAddress/L turns it off
+
+ This example is written for a network using WPA encryption. For
+ WEP or WPA, change the Wifi.begin() call accordingly.
+
+ Circuit:
+ * WiFi shield attached
+ * LED attached to pin 9
+
+ created 25 Nov 2012
+ by Tom Igoe
+ */
+#include <SPI.h>
+#include <WiFi.h>
+
+char ssid[] = "yourNetwork"; // your network SSID (name)
+char pass[] = "secretPassword"; // your network password
+int keyIndex = 0; // your network key Index number (needed only for WEP)
+
+int status = WL_IDLE_STATUS;
+WiFiServer server(80);
+
+void setup() {
+ Serial.begin(9600); // initialize serial communication
+ pinMode(9, OUTPUT); // set the LED pin mode
+
+ // check for the presence of the shield:
+ if (WiFi.status() == WL_NO_SHIELD) {
+ Serial.println("WiFi shield not present");
+ while(true); // don't continue
+ }
+
+ // attempt to connect to Wifi network:
+ while ( status != WL_CONNECTED) {
+ Serial.print("Attempting to connect to Network named: ");
+ Serial.println(ssid); // print the network name (SSID);
+
+ // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
+ status = WiFi.begin(ssid, pass);
+ // wait 10 seconds for connection:
+ delay(10000);
+ }
+ server.begin(); // start the web server on port 80
+ printWifiStatus(); // you're connected now, so print out the status
+}
+
+
+void loop() {
+ WiFiClient client = server.available(); // listen for incoming clients
+
+ if (client) { // if you get a client,
+ Serial.println("new client"); // print a message out the serial port
+ String currentLine = ""; // make a String to hold incoming data from the client
+ while (client.connected()) { // loop while the client's connected
+ if (client.available()) { // if there's bytes to read from the client,
+ char c = client.read(); // read a byte, then
+ Serial.write(c); // print it out the serial monitor
+ if (c == '\n') { // if the byte is a newline character
+
+ // if the current line is blank, you got two newline characters in a row.
+ // that's the end of the client HTTP request, so send a response:
+ if (currentLine.length() == 0) {
+ // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
+ // and a content-type so the client knows what's coming, then a blank line:
+ client.println("HTTP/1.1 200 OK");
+ client.println("Content-type:text/html");
+ client.println();
+
+ // the content of the HTTP response follows the header:
+ client.print("Click <a href=\"/H\">here</a> turn the LED on pin 9 on<br>");
+ client.print("Click <a href=\"/L\">here</a> turn the LED on pin 9 off<br>");
+
+ // The HTTP response ends with another blank line:
+ client.println();
+ // break out of the while loop:
+ break;
+ }
+ else { // if you got a newline, then clear currentLine:
+ currentLine = "";
+ }
+ }
+ else if (c != '\r') { // if you got anything else but a carriage return character,
+ currentLine += c; // add it to the end of the currentLine
+ }
+
+ // Check to see if the client request was "GET /H" or "GET /L":
+ if (currentLine.endsWith("GET /H")) {
+ digitalWrite(9, HIGH); // GET /H turns the LED on
+ }
+ if (currentLine.endsWith("GET /L")) {
+ digitalWrite(9, LOW); // GET /L turns the LED off
+ }
+ }
+ }
+ // close the connection:
+ client.stop();
+ Serial.println("client disonnected");
+ }
+}
+
+void printWifiStatus() {
+ // print the SSID of the network you're attached to:
+ Serial.print("SSID: ");
+ Serial.println(WiFi.SSID());
+
+ // print your WiFi shield's IP address:
+ IPAddress ip = WiFi.localIP();
+ Serial.print("IP Address: ");
+ Serial.println(ip);
+
+ // print the received signal strength:
+ long rssi = WiFi.RSSI();
+ Serial.print("signal strength (RSSI):");
+ Serial.print(rssi);
+ Serial.println(" dBm");
+ // print where to go in a browser:
+ Serial.print("To see this page in action, open a browser to http://");
+ Serial.println(ip);
+}