//declare pins to be used
//for servo motor
int servoPin = A3;
Servo myServo;
int servoPos = 0;

//variables for soil moisture
int soilMoistureLed = D3;
int moistPin = A1;
int moistVal = 0;

//variable to store piezo value
int speakerPin = A4;

//melody tune array
int melody[] = {2000,0,2000,0,2000,0,2000,0}; 

//duration of each of the notes
int noteDurations[] = {4,8,8,4,4,4,4,4};

//set counter for SMS function
int last_published = -1;

void setup() {
    
    pinMode (soilMoistureLed, OUTPUT);
    
    Serial.begin(9600);
    
    //declare particle variable to track and use value on cloud
    Particle.variable( "soil", moistVal );


  // attaches the servo on the A3 pin to the servo object
    myServo.attach( A3 );

   //Register our Particle to control the servo
    //Particle.function("servo", servoControl);

  // Keep a cloud variable for the current position
//Particle.variable(  "servoPos" , &servoPos , INT );

}

void loop() {
    
moistVal = analogRead(moistPin);
Serial.println(moistVal);
//log_to_spreadsheet(  );

    
//extreme condition - water content is extremely low. Send alert to user to take action.
//servo arm moves 90 degrees to open valve
if (moistVal > 3000){
    myServo.write(45);
    digitalWrite (soilMoistureLed, HIGH);
    delay (50);
    digitalWrite (soilMoistureLed, LOW);
    delay (50);
    sendSMS();
    
 
//moderate condition - water content is low. Water the plant but don't send alert to user
//servo arm moves 90 degrees to open valve
 }else if (moistVal > 2000 and moistVal <3000){
    myServo.write(45);
    digitalWrite (soilMoistureLed, HIGH);
    delay (500);
    digitalWrite (soilMoistureLed, LOW);
    delay (500);
    
}else {
    digitalWrite (soilMoistureLed, LOW);
    
    //servo arm moves -90 degrees to close valve
    myServo.write(0);
}
}


//function for piezo - symbolizes Amazon Echo
void alexa()
{
    // iterate over the notes of the melody:
    for (int thisNote = 0; thisNote < 8; thisNote++) {

      // to calculate the note duration, take one second
      // divided by the note type.
      //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
      int noteDuration = 1000/noteDurations[thisNote];
      tone(speakerPin, melody[thisNote],noteDuration);

      // to distinguish the notes, set a minimum time between them.
      // the note's duration + 30% seems to work well:
      int pauseBetweenNotes = noteDuration * 1.30;
      delay(pauseBetweenNotes);
      // stop the tone playing:
      noTone(speakerPin);
    }
}


//function for sending SMS
void sendSMS(  ){
    
    	Particle.publish( "SendSMS", String( moistVal  ) );
		last_published = millis();
    		//only send message once to user. Increase delay between messages even if condition is met.
		
	//delay(1000);
    }


//function to log values to spreadsheet

void log_to_spreadsheet(  ){

  // check if 1 minute has elapsed
	if( last_published + 1000 < millis() ){
		Particle.publish( "Log", String( moistVal  ) );
		last_published = millis();
	}

}