/*
 MDNS WiFi Web Server

 A simple web server that shows the value of the analog input pins,
 and exposes itself on the MDNS name 'wifi101.local'.

 On Linux (like Ubuntu 15.04) or OSX you can access the web page
 on the device in a browser at 'http://wifi101.local/'.

 On Windows you'll first need to install the Bonjour Printer Services
 from:
   https://support.apple.com/kb/dl999?locale=en_US
 Then you can access the device in a browser at 'http://wifi101.local/'.

 This example is written for a network using WPA encryption. For
 WEP or WPA, change the WiFi.begin() call accordingly.

 Circuit:
 * WiFi shield attached
 * Analog inputs attached to pins A0 through A5 (optional)

 created 13 July 2010
 by dlf (Metodo2 srl)
 modified 31 May 2012
 by Tom Igoe
 modified 27 January 2016
 by Tony DiCola

*/

#include <SPI.h>
#include <WiFi101.h>
#include <WiFiMDNSResponder.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)

char mdnsName[] = "wifi101"; // the MDNS name that the board will respond to
// Note that the actual MDNS name will have '.local' after
// the name above, so "wifi101" will be accessible on
// the MDNS name "wifi101.local".

int status = WL_IDLE_STATUS;

// Create a MDNS responder to listen and respond to MDNS name requests.
WiFiMDNSResponder mdnsResponder;

WiFiServer server(80);

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue:
    while (true);
  }

  // attempt to connect to WiFi network:
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(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);
  }
  // you're connected now, so print out the status:
  printWiFiStatus();

  server.begin();

  // Setup the MDNS responder to listen to the configured name.
  // NOTE: You _must_ call this _after_ connecting to the WiFi network and
  // being assigned an IP address.
  if (!mdnsResponder.begin(mdnsName)) {
    Serial.println("Failed to start MDNS responder!");
    while(1);
  }

  Serial.print("Server listening at http://");
  Serial.print(mdnsName);
  Serial.println(".local/");
}


void loop() {
  // Call the update() function on the MDNS responder every loop iteration to
  // make sure it can detect and respond to name requests.
  mdnsResponder.poll();

  // listen for incoming clients
  WiFiClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connection: close");  // the connection will be closed after completion of the response
          client.println("Refresh: 5");  // refresh the page automatically every 5 sec
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
          // output the value of each analog input pin
          for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
            int sensorReading = analogRead(analogChannel);
            client.print("analog input ");
            client.print(analogChannel);
            client.print(" is ");
            client.print(sensorReading);
            client.println("<br />");
          }
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        }
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);

    // close the connection:
    client.stop();
    Serial.println("client disconnected");
  }
}


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");
}
