int redPin = D2;    // RED pin of the LED to PWM pin **d2**
int greenPin = D3;  // GREEN pin of the LED to PWM pin **d3**
int bluePin = D4;   // BLUE pin of the LED to PWM pin **D4**
int fsrPin=A2; //Fsr pin initialization
int fsrReading=0; //variable for reading fsr sensor
int moistPin=A1;//initializing moisture sensor pin
int moistVal=0;//variable for reading moist sensor
int moistMax=1500;//variable for reading maximum moisture in the soil
int moistMin=800;//variable for reading minimum moisture in the soil
int redValue=255; // Brightness of red LED
int greenValue=255; // Brightness of green LED
int blueValue=255; // Brightness of blue LED
Servo heartbeat;//define the servo motor
int moisture=0;//Moisture value to be logged in the google sheets
void setup() {
    Particle.variable( "SoilReading", moistVal );//Display actual soil moisture sensor reading
    Particle.variable( "Moisture", moisture );//Display the moisture value mapped from the actual sensor reading
    Particle.variable( "Button", fsrReading );//Display the FSR button reading
	heartbeat.attach( D5 );
	 pinMode( redPin, OUTPUT ); //pin mode initialization for red pin
    pinMode( greenPin, OUTPUT ); //pin mode initialization for green pin	
    pinMode( bluePin, OUTPUT );	//pin mode initialization for blue pin
    analogWrite(redPin, 255);//Initializing red pin to off state
    analogWrite(greenPin, 255);//Initializing green pin to off state
    analogWrite(bluePin, 255);//Initializing blue pin to off state*/
    Particle.function("MaxMoistLevel", setmoistMax);//Get user input for moistMax variable from console
    Particle.function("MinMoistLevel", setmoistMin);//Get user input for moistMin variable from console
}
int setmoistMax( String command )
{
    // get the maximum moisture level from console
    moistMax= command.toInt();
  
   return 1;
}
int setmoistMin( String command )
{
    // get the maximum moisture level from console
    moistMin= command.toInt();
  
   return 1;
}
void setRGBLED(int red,int green,int blue) //function for setting the RGB LED color
{
    analogWrite(redPin, red);  //output the red led 
     analogWrite(greenPin, green);//output the green led 
     analogWrite(bluePin,blue);//output the blue led 
}
void loop() {
    fsrReading= analogRead(fsrPin);
     moistVal = analogRead(moistPin);
     moisture=map(moistVal,0,4095,0,100);
    if(moistVal<=moistMax&&moistVal>=moistMin)//check if moisture is in the optimum range
     {
        setRGBLED(255,0,255);//set green color
	    heartbeat.write(180);
	    delay(300);
	    heartbeat.write(145);
	    delay(300);
     }
     if(moistVal>moistMax)//check if the moisture is very high
     {
	    setRGBLED(0,255,255);//set red color
	    heartbeat.write(180);
	    delay(120);
	    heartbeat.write(155);
	    delay(120);
     }
     if(moistVal<moistMin && moistVal>30)//check if the moisture is very low
     {
	    setRGBLED(255,255,0);//set blue color
	    heartbeat.write(180);
	    delay(1000);
	    heartbeat.write(145);
	    delay(1000);
     }
     if(moistVal<=30)//check if no moisture i.e., the plant is dead
     {
         setRGBLED(255,255,255);//switch off the LED
         delay(10000);
     }
     if(fsrReading>3000)//check if fsr is pressed
     log_to_spreadsheet();//log the moisture value in the spreadsheet
}
int last_published = -1;

void log_to_spreadsheet(  )
{

  // check if 1 minute has elapsed
	if( last_published + 60000 < millis() ){
		Particle.publish("Moisture_Value",String(moisture));//publish the moisture value
		last_published = millis();
	}

}