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// Created by edwin martin on the 03/09/2017 last modified 21/12/2017
// All right reserved, copyright 23/12/2017
// This code is not to be used commercially with out permission.
// contact husqvarna1990@yahoo.com


#include <WiFiEsp.h>
#include "SoftwareSerial.h"

SoftwareSerial Serial1(6, 7); // RX, TX


char ssid[] = "ESP8266_AP";      // your Access point  SSID (name)
char pass[] = "Password1";       // your Access point password
char Bssid[60];
char Bpass[60];
int status = WL_IDLE_STATUS;     // the Wifi radio's status
int reqCount = 0;                // number of requests received
byte buffer[100];
String output = "";
String output2 = "";
boolean loops = true;
float temp, hum;
int fan1, fan2;
WiFiEspServer server(80);
void setup()
{
  Serial.begin(115200);   // initialize serial for debugging
  Serial1.begin(9600);    // initialize serial for ESP module
  WiFi.init(&Serial1);    // initialize ESP module
  // check for the presence of the shield
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println(F("WiFi shield not present"));
    while (true); // don't continue
  }
  Serial.print(F("Attempting to start AP "));
  Serial.println(ssid);
  IPAddress localIp(192, 168, 4, 1); // uncomment these two lines if you want to set the IP address of the AP
  WiFi.configAP(localIp);
  status = WiFi.beginAP(ssid);// start access point
  Serial.println(F("Access point started"));
  printWifiStatus();
  // start the web server on port 80
  server.begin();
  Serial.println(F("Server started"));
  while (loops) {
    WiFiEspClient client = server.available();  // listen for incoming clients
    if (client) {
      int ctr = 0;
      buffer[100] = "";
      //Serial.println("Client connected");
      // an http request ends with a blank line
      boolean currentLineIsBlank = true;
      while (client.connected()) {
        while (client.available()) {
          char c = client.read();
          // 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) {
            // Here is where the POST data is.
            Serial.println(F("Post data: "));
            while (client.available())
            {
              buffer[ctr] = client.read();
              ctr++;
            }

            int datactr = 0;
            int andctr = 0;

            for (int x = 0; x < ctr; x++) {

              if (buffer[x] == '=') {
                if (datactr < 1) {
                  Serial.print(F("User: "));
                }
                datactr++;
                x++;
              }
              if (buffer[x] == '&') {
                andctr++;
                x++;
                Serial.print(F("nPassword: "));
              }
              if (datactr == 1 && andctr == 0) {
                Serial.write(buffer[x]);
                output += char(buffer[x]);
              }
              if (datactr == 2 && andctr == 1) {
                Serial.write(buffer[x]);
                output2 += char(buffer[x]);
              }
            }
            output.toCharArray(Bssid, 50);
            Serial.print(F("nSSID: "));
            Serial.println(Bssid);
            output2.toCharArray(Bpass, 50);
            Serial.print(F("nPASS: "));
            Serial.println(Bpass);
            Serial.println();
            //Serial.println("Sending response");
            // send a standard http response header
            client.println(F("HTTP/1.0 200 OK"));
            client.println(F("Content-Type: text/html"));
            client.println(F("Connection: keep-alive"));
            client.println();
            //form added to send data from browser and view received data in serial monitor
            client.println();
            client.println(F("<!DOCTYPE html>"));
            client.println(F("<html lang="en"><head><style>body{background-color:#eef;}"));
            client.println(F("h1{text-align:center;font-family:sans-serif;font-size:72px;}"));
            client.println(F("p{text-align:center;font-family:sans-serif;font-size:22px;padding-top:12px; margin-bottom:0px;}"));
            client.println(F("#dl{width:500px;height:260px;margin:70px auto;background-color:#d0d0e1;display: table;}"));
            client.println(F("</style></head><body><h1>Configure WiFi</h1>"));
            client.println(F("<div id="dl"><p>Please enter your wifi SSID and Password</p>"));
            client.println(F("<form action="" method="POST"><p>"));
            client.println(F("<label for="username">SSID:</label>"));
            client.println(F("<input type="text" name="uname"><br><br>"));
            client.println(F("<label for="password">Password:</label>"));
            client.println(F("<input type="password" name="pwd"><br><br>"));
            client.println(F("<input type="submit" value="Submit"></p></form>"));
            if (output != "") {
              client.println(F("<p>SSID and password changed.</p>"));
              loops = false;
            }
            client.println(F("</div></body>"));
            client.println(F("</html>"));
            client.println();
            client.stop();
          }
          else 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;
          }
        }
      }
      Serial.println(F("Disconnected"));
      if (!loops){
     int status = WL_IDLE_STATUS;
     network();
      }
    }
  }
}

void network() {
  Serial1.println(F("AT+RST"));
  delay(5000);
  WiFi.init(&Serial1);    // initialize ESP module
  // check for the presence of the shield
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println(F("WiFi shield not present"));
    while (true); // don't continue
  }
  // attempt to connect to WiFi network
  while ( status != WL_CONNECTED) {
    Serial.print(F("Attempting: "));
    Serial.println(Bssid);
    // Connect to WPA/WPA2 network
    status = WiFi.begin(Bssid, Bpass);
  }
  Serial.println(F("You're connected"));
  printWifiStatus();
  server.begin();
}

void loop()
{
  temp = random(1, 30);
  hum = random(30, 99);
  fan1 = random(10, 99);
  fan2 = random(10, 99);
  WiFiEspClient client = server.available();
  if (client) {
    Serial.println(F("New client"));
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        if (c == 'n' && currentLineIsBlank) {
          Serial.println(F("Sending response"));
          client.print(F(
            "HTTP/1.1 200 OKrn"
            "Content-Type: text/htmlrn"
            "Connection: closern"
            "Refresh: 120rn"
            "rn"));
          client.print(F("<!DOCTYPE HTML>rn"));
          client.print(F("<html><head>rn"));
          client.print(F("<link rel='stylesheet' href='http://www.southamptonstudentrooms.com/ESP.css'>"));
          client.print(F("</head><body><h1>Aerium Botanix V1.0</h1><div id="di">"));
          client.print(F("<p>These values will refresh every two minutes</p>"));
          client.print(F("<div class="div1"><h2>Temp<br>R/H<br>Fan 1<br>Fan 2</h2></div>"));
          client.print("<div class="div2"><h2>"+String(temp)+"&#x2103<br>"+String(hum)+"%<br>"+String(fan1)+"%<br>"+String(fan2)+"%</h2>");
          client.print(F("</div></div></body>"));
          client.print(F("</html>rn"));
          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;
        }
      }
    }
    delay(10);
    client.stop();
    Serial.println(F("Client disconnected"));
  }
}

void printWifiStatus()
{
  // print your WiFi shield's IP address
  IPAddress ip = WiFi.localIP();
  Serial.print(F("IP Address: "));
  Serial.println(ip);
  Serial.println();
}