#include <LiquidCrystal.h> //needed for LCD control

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 7, d5 = 6, d6 = 5, d7 = 4;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

String AP = "D_LINK_259701";       // SSID name, enter your own  network name
String PASS = "Abracadabra@2"; // and enter your network Password
String REG_KEY = "witjmvmox0x9";   // hardware registration key on takano (do not confuse with user registration key!)
String HOST = "iotsprint.com"; //website Arduino should send http request to
String PORT = "80"; //default port

int countTrueCommand;
int countTimeCommand;
boolean found = false;
int tempPin = 1;
int timeout = 0;
int first, last, first1, last1;
String stringTwo, stringThree, data, data1, data2, content;

void negotiate_modem() //sequence of AT commands from Arduino to ESP8266
{  //this function allows the Arduino to connect to the router
  sendCommand("AT+CWMODE=1", 50, "OK");
  sendCommand("AT+CIPMUX=1", 50, "OK");
  sendCommand("AT+CWJAP=\"" + AP + "\",\"" + PASS + "\"", 150, "OK");
}
void setup() {
  Serial.begin(115200);
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print(" takano example");
  delay(2000);
  sendCommand("AT", 50, "OK");
  lcd.clear();
}

void loop() {
  //read the LM35 temperature sensor analog input on analogue pin1
  data = "";
  data1 = "";
  data2 = "";
  content = "";
  if (found == false) negotiate_modem(); //if Arduino did not get a proper string back from cloud, then try to connect to modem again. Maybe power was recyled to modem for example..
  float celsius = (500.0 * analogRead(tempPin)) / 1024.0; //5V or 5000mV correspond to 1024 steps of 10-bit AD converter, and LM35 increases by 10mV per degree C..
  stringTwo = String(celsius);
  stringThree= String(stringTwo);
  if (stringTwo.length() == 5) stringThree = stringTwo.substring(0, stringTwo.length() - 1); //trim it to 4 characters
  if (stringThree.length() < 2) stringThree = "000" + stringThree; //to make sure it has 4 characters length
  else if (stringThree.length() < 3) stringThree = "00" + stringThree; //to make sure it has 4 characters length
  else if (stringThree.length() < 4) stringThree = "0" + stringThree; //to make sure it has 4 characters length
  stringThree = "T=" + stringThree; // stringThree = “T=23.4” for example
  lcd.setCursor(0, 0);
  lcd.print(stringThree);

String getData = "GET /tk.php?r="+REG_KEY+"&m=" + stringThree + " HTTP/1.0";        sendCommand("AT+CIPSTART=4,\"TCP\",\"iotsprint.com\",80", 10, "OK");
  sendCommand("AT+CIPSEND=4,71", 10, ">");   
  Serial.println(getData); delay(2000); countTrueCommand++; //46
  read_cloud("Host:iotsprint.com:80");  //25
  delay(3000);
}

void read_cloud(String command)
{
  data = "";
  data1 = "";
  Serial.println(command);
  Serial.println();
  timeout = 0;
  while (Serial.available() == 0) {
    if ( ++timeout > 10000) { // set this to your timeout value in milliseconds
      break;
    }
  }
  timeout = 0; // got a char so reset timeout
  content = Serial.readString(); // read the incoming data as string

  if (content.indexOf("L=") >= 0) //slider value is 0 to 100
  {
    first = content.indexOf("L=") + 2;
    last = content.lastIndexOf("S=");
    data = content.substring(first, last - 1);
  }
  if (content.indexOf("S=") >= 0) //switch value is either 0 (off) or 1 (on)
  {
    first1 = content.indexOf("S=") + 2;
    last1 = first1 + 1;
    data1 = content.substring(first1, last1);
  }  

  if ((data != "") && (data1 != ""))
  {
    data2 = "S="+data1+" "+"L=" +data+"      ";
    lcd.setCursor(0, 1);
    lcd.print(data2);
  }
}

void sendCommand(String command, int maxTime, char readReplay[]) {
  found = false;
  while (countTimeCommand < (maxTime * 1))
  {
    Serial.println(command); 
    if (Serial.find(readReplay)) //ok
    {
      found = true;
      break;
    }
    countTimeCommand++;
  }

  if (found == true)
  {
    countTrueCommand++;
    countTimeCommand = 0;
  }

  if (found == false)
  {
    countTrueCommand = 0;
    countTimeCommand = 0;
  }
}