#include "DHT.h"

int moistSensor = A0; //moisture sensor
int pumpPin = 8; //relay pin

#define RELAY_FAN_PIN 2 // Arduino pin connected to relay which connected to fan
#define DHTPIN 12           // Arduino pin connected to relay which connected to DHT sensor
#define DHTTYPE DHT22
int buzzer =  13; 
int inputPin = 4;
int ledPin = 6;
int ledPin2 = 5;
int val = 0;                    // variable for reading the pin status
int pirState = LOW; 

const int TEMP_THRESHOLD_UPPER = 25; // upper threshold of temperature, change to your desire value
const int TEMP_THRESHOLD_LOWER = 20; // lower threshold of temperature, change to your desire value

DHT dht(DHTPIN, DHTTYPE);

float temperature;    // temperature in Celsius

void setup()
{
  Serial.begin(9600); // initialize serial
  dht.begin();        // initialize the sensor
  pinMode(RELAY_FAN_PIN, OUTPUT); // initialize digital pin as an output
  pinMode(buzzer,OUTPUT);
  pinMode(inputPin, INPUT);
  pinMode(moistSensor, INPUT);
  pinMode(pumpPin, OUTPUT);

}

void loop()
{
  tempDetect();// wait a few seconds between measurements.
  stolenDetect();
  watering();
}

void tempDetect(){
  
  delay(2000);

  temperature = dht.readTemperature();; 
  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
  } else {
    if(temperature > TEMP_THRESHOLD_UPPER){
      Serial.println("The fan is turned on");
      digitalWrite(RELAY_FAN_PIN, HIGH); // turn on
      digitalWrite(buzzer,HIGH);
    } else if(temperature < TEMP_THRESHOLD_LOWER){
      Serial.println("The fan is turned off");
      digitalWrite(RELAY_FAN_PIN, LOW); // turn on
      digitalWrite(buzzer,LOW);
    }
   
  }
}

void stolenDetect(){
    val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Motion detected!");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH) {
      // we have just turned of
      Serial.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
}

void watering(){
  int moistSensor = analogRead(A0); //read analog value of moisture sensor
  int moisture = ( 100 - ( (moistSensor / 1023.00) * 100 ) ); //convert analog value to percentage
  Serial.println(moisture);
  if (moisture < 40) { //change the moisture threshold level based on your calibration values
    digitalWrite(pumpPin, HIGH); // turn on the motor
    delay(500);      // multiply by 1000 to translate seconds to milliseconds
    Serial.println("The Water Pump is turned on");
  }
  else {
    digitalWrite(pumpPin, LOW);  // turn off the motor
    delay(500);      // multiply by 60000 to translate minutes to milliseconds
    Serial.println("The Water Pump is turned off");
  }
}