#include <dht11.h>                 //this will provide an easy and inexpensive way to get temperature and humidity measurements
#include<Servo.h>                  //Using the Arduino as the controller device,the library enables to control the servo motor
#define DHT11PIN 4                 //defineing the pin 4 is attached to arduino uno
#define soilmoisture A5            // defining the pin A5 is attached to arduino uno
#define relay 3                    //defining the pin 3 is attached to arduino uno                 

dht11 DHT11;
int value;
Servo Myservo;                      //initialize a servo object to control a servo
int pos;                            //initization position of servo motor 
int water;                          //random variable 
void setup() {
    Serial.begin(9600);
    pinMode(relay ,OUTPUT);         //output pin for relay board, this will sent signal to the relay
   // pinMode(A5,INPUT);            //input pin coming from soil sensor
    Myservo.attach(7);
}
void dht11()
{
  Serial.println();

  value = DHT11.read(DHT11PIN);

  Serial.print("Humidity (%): ");
  Serial.println((float)DHT11.humidity, 2);

  Serial.print("Temperature (C): ");
  Serial.println((float)DHT11.temperature, 2);

  delay(2000);

}


void loop() { 
  water = analogRead(soilmoisture);  // reading the coming signal from the soil sensor
  Serial.print(water);
  if(water == HIGH) 
  {
   gsm();
   digitalWrite(3,LOW);             // turn on the relay 
   for(pos=0;pos<=180;pos++){       // turn on the servo motor 
   Myservo.write(pos);
   delay(15);
}
  delay(1000);
  }
  else
  {
  digitalWrite(3,HIGH);             //high to continue proving signal and water supply
  for(pos=180;pos>=0;pos--){
  Myservo.write(pos);
  delay(15);
}
  delay(1000);
  }
  delay(400); 
}

//function for GSM 
void gsm()
{
  Serial.print("\r");                       // start the message 
    delay(1000);                            // 1 second delay
  Serial.print("AT+CMGF=1\r");              //sets the GSM modem in SMS Text Mode 
    delay(1000);                            // 1 second delay
  Serial.print("AT+CMGS=\"+91xxxxxxxxxx\"\r");  //replace x with the mobile number you want to send the message.
    delay(1000);                            // 1 second delay
  Serial.print("TechieYan Technologies\r"); // Message you want to send
    delay(1000);                            // 1 second delay
  Serial.println((char)26);                 // CTRL+Z is given to GSM to end the sms. So the ASCII value of CTRL+Z is 26.
    delay(1000);                            // 1 second delay 
  }