#include <SoftwareSerial.h>        //Libraries required for Serial communication, i²c communication, DHT11 and MLX90614
char Received_SMS;              //Here we store the full received SMS (with phone sending number and date/time) as char
short KOLIK_OK=-1;      //Used later it shows if there's the word "DHT"/"MLX" within the received SMS "-1" means they are not found
String Data_SMS;               //Here's the SMS that we gonna send to the phone number, it may contain DHT data or MLX data
SoftwareSerial sim800l(10,11); // MEGA TX10,RX11// UNO 2,3                   // RX,TX for Arduino and for the module it's TXD RXD, they should be inverted
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd( 0x27, 20, 4 );
#include <OneWire.h>
#include <DallasTemperature.h>
byte c_hacek[8] = {  //definice znaku c s háčkem = č
  B01010,           // jednička svítí
  B00100,           // nula nesvítí
  B01110,
  B10000,
  B10000,
  B10001,
  B01110,
  };

#include "HX711.h"

#define calibration_factor_1 23000//(-19300)(-42600.0) //This value is obtained using the SparkFun_HX711_Calibration sketch
#define calibration_factor_2 23500//(-19300)(-42600.0) //This value is obtained using the SparkFun_HX711_Calibration sketch
#define calibration_factor_3 23500//(-19300)(-42600.0) //This value is obtained using the SparkFun_HX711_Calibration sketch
#define calibration_factor_4 -22300//(-19300)(-42600.0) //This value is obtained using the SparkFun_HX711_Calibration sketch

#define DOUT1  28
#define CLK1  29
const int Tare1 = 22;
#define DOUT2  30
#define CLK2  31
const int Tare2 = 23;
#define DOUT3  34
#define CLK3  36
const int Tare3 = 24;
#define DOUT4  38
#define CLK4  40
const int Tare4 = 25;

HX711 scale1;
HX711 scale2;
HX711 scale3;
HX711 scale4;

const int pinCidlaDS = 27;
OneWire oneWireDS(pinCidlaDS);
DallasTemperature senzoryDS(&oneWireDS);
void setup()
{

  Serial.begin(9600);
  sim800l.begin(9600);   //Begin all the communications needed Arduino with PC serial and Arduino with all devices (SIM800L+DHT+MLX)
  senzoryDS.begin();
  Serial.println("Starting ...");
  delay(3000);         //Delay to let the module connect to network, can be removed
  ReceiveMode();       //Calling the function that puts the SIM800L moduleon receiving SMS mode
  lcd.init( );
  lcd.backlight( );
  lcd.createChar(1, c_hacek);   //odeslání definice 2. znaku

pinMode(53, OUTPUT);
  digitalWrite(53, HIGH);

  scale1.begin(DOUT1, CLK1);
  pinMode(Tare1, INPUT);
  digitalWrite(Tare1, LOW);
  scale1.set_scale(calibration_factor_1); //This value is obtained by using the SparkFun_HX711_Calibration sketch
  scale1.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0

  scale2.begin(DOUT2, CLK2);
  pinMode(Tare2, INPUT);
  digitalWrite(Tare2, LOW);
  scale2.set_scale(calibration_factor_2); //This value is obtained by using the SparkFun_HX711_Calibration sketch
  scale2.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0

  scale3.begin(DOUT3, CLK3);
  pinMode(Tare3, INPUT);
  digitalWrite(Tare3, LOW);
  scale3.set_scale(calibration_factor_3); //This value is obtained by using the SparkFun_HX711_Calibration sketch
  scale3.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0

  scale4.begin(DOUT4, CLK4);
  pinMode(Tare4, INPUT);
  digitalWrite(Tare4, LOW);
  scale4.set_scale(calibration_factor_4); //This value is obtained by using the SparkFun_HX711_Calibration sketch
  scale4.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0

  //Serial.println("Readings:");

}

void loop() {

 /* Serial.print("Hmotnost: ");
  Serial.print(scale1.get_units(),1); //scale.get_units() returns a float
  Serial.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor
  Serial.println();
*/
  senzoryDS.requestTemperatures();
  //Serial.print(senzoryDS.getTempCByIndex(0));
  lcd.clear() ;
  lcd.setCursor(0,0);
  lcd.print("V");
  lcd.write(byte(1));    //zobrazí č (znak 1)
  lcd.print("elstvo 1:");
  lcd.setCursor(12,0);
  lcd.print(scale1.get_units(),1); //scale.get_units() returns a float
  lcd.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor

  /*Serial.print("Hmotnost: ");
  Serial.print(scale2.get_units(),1); //scale.get_units() returns a float
  Serial.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor
  Serial.println();
  */
  lcd.setCursor(0,1);
  lcd.print("V");
  lcd.write(byte(1));    //zobrazí č (znak 1)
  lcd.print("elstvo 2:");
  lcd.setCursor(12,1);
  lcd.print(scale2.get_units(),1); //scale.get_units() returns a float
  lcd.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor

  /*Serial.print("Hmotnost: ");
  Serial.print(scale3.get_units(),1); //scale.get_units() returns a float
  Serial.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor
  Serial.println();
  */
  lcd.setCursor(0,2);
  lcd.print("V");
  lcd.write(byte(1));    //zobrazí č (znak 1)
  lcd.print("elstvo 3:");
  lcd.setCursor(12,2);
  lcd.print(scale3.get_units(),1); //scale.get_units() returns a float
  lcd.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor

  /*Serial.print("Hmotnost: ");
  Serial.print(scale4.get_units(),1); //scale.get_units() returns a float
  Serial.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor
  Serial.println();
  */
  lcd.setCursor(0,3);
  lcd.print("V");
  lcd.write(byte(1));    //zobrazí č (znak 1)
  lcd.print("elstvo 4:");
  lcd.setCursor(12,3);
  lcd.print(scale4.get_units(),1); //scale.get_units() returns a float
  lcd.print(" kg"); //You can change this to kg but you'll need to refactor the calibration_factor

  delay(1000);

  if (digitalRead(Tare1) == HIGH)
{
scale1.tare();
}
if (digitalRead(Tare2) == HIGH)
{
scale2.tare();
}
if (digitalRead(Tare3) == HIGH)
{
scale3.tare();
}
if (digitalRead(Tare4) == HIGH)
{
scale4.tare();
}

  String RSMS;

    while(sim800l.available()>0){       //When SIM800L sends something to the Arduino... problably the SMS received... if something else it's not a problem

    Received_SMS=sim800l.read();  //"char Received_SMS" is now containing the full SMS received
    Serial.print(Received_SMS);   //Show it on the serial monitor (optional)
    RSMS.concat(Received_SMS);    //concatenate "char received_SMS" to RSMS which is "empty"
    KOLIK_OK=RSMS.indexOf("KOLIK");   //And this is why we changed from char to String, it's to be able to use this function "indexOf"
                                      //For example if found at the beginning it will give "0" after 1 character it will be "1"
                                      //If it's not found it will give "-1", so the variables are integers

    }

  if(KOLIK_OK!=-1){                         //If "DHT" word is found within the SMS, it means that DHT_OK have other value than -1 so we can proceed
    float a = scale1.get_units();
    float b = scale2.get_units();
    float c = scale3.get_units();
    float d = scale4.get_units();
    float e = senzoryDS.getTempCByIndex(0);
    Data_SMS = "HMOTNOST\nVcelstvo 1 = "+String(a,1)+" Kg"+" \nVcelstvo 2 ="+String(b,1)+" Kg"+" \nVcelstvo 3 ="+String(c,1)+" Kg"+" \nVcelstvo 4 ="+String(d,1)+" Kg"+" \nTeplota ="+String(e,1)+" stupnu Celsia";       //Prepare the SMS to send, it contains some strings like "DHT" "Temperature"...
                                                                                         //And then the values read

    Send_Data();                      //This function set the sending SMS mode, prepare the phone number to which we gonna send, and send "Data_SMS" String
    ReceiveMode();                   //Come back to Receving SMS mode and wait for other SMS

    KOLIK_OK=-1;                      //If the DHT is found the variable should be reset to -1 otherwise it will be kept as !=-1 and will send SMS over and over

                                     //And at this point I'm too lazy to reupload the code without it and test...

  }
}


void Serialcom() //This is used with ReceiveMode function, it's okay to use for tests with Serial monitor
{
  delay(500);
  while(Serial.available())
  {
    sim800l.write(Serial.read());//Forward what Serial received to Software Serial Port
  }
  while(sim800l.available())
  {
    Serial.write(sim800l.read());//Forward what Software Serial received to Serial Port
  }
}

void ReceiveMode(){       //Set the SIM800L Receive mode

  sim800l.println("AT"); //If everything is Okay it will show "OK" on the serial monitor
  Serialcom();
  sim800l.println("AT+CMGF=1"); // Configuring TEXT mode
  Serialcom();
  sim800l.println("AT+CNMI=2,2,0,0,0"); //Configure the SIM800L on how to manage the Received SMS... Check the SIM800L AT commands manual
  Serialcom();
}

void Send_Data()
{
  Serial.println("Sending Data...");     //Displays on the serial monitor...Optional
  sim800l.print("AT+CMGF=1\r");          //Set the module to SMS mode
  delay(100);
  sim800l.print("AT+CMGS=\"+420111111111\"\r");//Your phone number don't forget to include your country code example +212xxxxxxxxx"
 delay(500);
  sim800l.print(Data_SMS);  //This string is sent as SMS
  delay(500);
  sim800l.print((char)26);//Required to tell the module that it can send the SMS
  delay(500);
  sim800l.println();
  Serial.println("Data Sent.");
  delay(500);

}