| /* | |
| 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 | |
| */ | |
| 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 | |
| } | |
| String fv = WiFi.firmwareVersion(); | |
| if (fv != "1.1.0") { | |
| Serial.println("Please upgrade the firmware"); | |
| } | |
| // 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); | |
| } | |