#include <SoftwareSerial.h>


SoftwareSerial espSerial =  SoftwareSerial(2,3);      



#include <DHT.h>        



#define DHTPIN 5                // Connect the signal pin of DHT11 sensor to digital pin 5
#define DHTTYPE DHT11 
DHT dht(DHTPIN, DHTTYPE);
int sensor_pin=A0;   //setting the sensor pin
 int outputpin=13;   //setting the output pin
 int output_value ;
      
String apiKey = "";     //I put the channel's thingspeak WRITE API key

String ssid="";    // I put Wifi network SSID
String password ="";  //I put Wifi network password

boolean DEBUG=true;

//======================================================================== showResponce
void showResponse(int waitTime){
    long t=millis();
    char c;
    while (t+waitTime>millis()){
      if (espSerial.available()){
        c=espSerial.read();
        if (DEBUG) Serial.print(c);
      }
    }
                   
}

//========================================================================
boolean thingSpeakWrite(float value1, float value2){
  String cmd = "AT+CIPSTART=\"TCP\",\"";                  // TCP connection
  cmd += "184.106.153.149";                               // api.thingspeak.com
  cmd += "\",80";
  espSerial.println(cmd);
  if (DEBUG) Serial.println(cmd);
  if(espSerial.find("Error")){
    if (DEBUG) Serial.println("AT+CIPSTART error");
    return false;
  }
  
  
  String getStr = "GET /update?api_key=";   // prepare GET string
  getStr += apiKey;
  
  getStr +="&field1=";
  getStr += String(value1);
  getStr +="&field2=";
  getStr += String(value2);
  // getStr +="&field3=";
  // getStr += String(value3);
  // ...
  getStr += "\r\n\r\n";

  // send data length
  cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  espSerial.println(cmd);
  if (DEBUG)  Serial.println(cmd);
  
  delay(100);
  
    espSerial.print(getStr);
    if (DEBUG)  Serial.print(getStr);
  
  return true;
}
//================================================================================ setup
void setup() {                
  DEBUG=true;           // enable debug serial
  Serial.begin(9600); 
  
  dht.begin();          // Start DHT sensor
  
  espSerial.begin(115200);  // enable software serial
                          // esp8266 module's speed is probably at 115200. 
              
  
  //soil moisture sensonsor
  Serial.println("Reading From the Sensor ...");//reads froms the sensor
  pinMode(13,OUTPUT);
   delay(2000);
  

  espSerial.println("AT+CWMODE=1");   // set esp8266 as client
  showResponse(1000);

  espSerial.println("AT+CWJAP=\""+ssid+"\",\""+password+"\"");  // set your home router SSID and password
  showResponse(5000);

   if (DEBUG)  Serial.println("Setup completed");
}


// ====================================================================== loop
void loop() {

  // Read sensor values
   float t = dht.readTemperature();
   float h = dht.readHumidity();
     
     
          if (DEBUG)  Serial.println("Temp="+String(t)+" *C");
          if (DEBUG) Serial.println("Humidity="+String(h)+" %");
           thingSpeakWrite(t,h);                                      // Write values to thingspeak
      
  
    
  // thingspeak needs 15 sec delay between updates,     
  delay(20000); 

    output_value= analogRead(sensor_pin);

  output_value = map(output_value,550,0,0,100);
  if(output_value<= -70) //checks if the moisture of the soil is low or high then opens and closes the valve
  {
    digitalWrite(13,HIGH); 
    }
    else
    {
      digitalWrite(13,LOW);
      }
  Serial.print("Mositure : ");
  
  Serial.print(output_value);

  Serial.println("%");

  delay(1000);
}