#include <DHT.h>
#define DHTPIN 3
#define DHTTYPE 22  // OR 11 FOR BLUE COLOUR SENSOR
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#define  trigPin1 10
#define   echoPin1 11
#define   trigPin2 8
#define   echoPin2 9

long duration1, distance1, duration2, distance2;

// initialize the sensor
DHT dht(DHTPIN,DHTTYPE);
LiquidCrystal_I2C lcd1=LiquidCrystal_I2C(0x27,16,2); 
LiquidCrystal_I2C lcd2=LiquidCrystal_I2C(0x25,16,2);
int c=0;

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd1.init();
  lcd2.init();
  lcd1.backlight();
  lcd2.backlight();
  pinMode(7, OUTPUT);
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);
  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);
  

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(2000);
  float temp=dht.readTemperature();
  float hum=dht.readHumidity();
  if(isnan(temp)||isnan(hum)){
    Serial.println("Error is DHT!");
  }
  else if(temp > 30){ //tea plants requires a temperature between 21-30, if temperature high than 30,it incadtes by red light
    digitalWrite(7, HIGH);
  Serial.print("Temperature ");
    Serial.println(temp);
    Serial.print("Humidity ");
    Serial.println(hum);

  }
  else if(temp < 20){//tea plants requires a temperature between 21-30, if temperature below than 20,it incadtes by red light
    digitalWrite(7, HIGH);
  Serial.print("Temperature ");
    Serial.println(temp);
    Serial.print("Humidity ");
    Serial.println(hum);

  }
   else if(hum < 40){//tea plants requires high humidity, if humidity below than 40,it incadtes by red light
    digitalWrite(7, HIGH);
  Serial.print("Temperature ");
    Serial.println(temp);
    Serial.print("Humidity ");
    Serial.println(hum);

  }
   else if(hum > 90){//if humidity high than 90,it incadtes by red light
    digitalWrite(7, HIGH);
  Serial.print("Temperature ");
    Serial.println(temp);
    Serial.print("Humidity ");
    Serial.println(hum);

  }
  else{
    digitalWrite(7, LOW);
    Serial.print("Temperature ");
    Serial.println(temp);
    Serial.print("Humidity ");
    Serial.println(hum);
  }
  
  lcd1.setCursor(1,0);
  lcd1.print("Temperature");
  lcd1.setCursor(1,1);
  lcd1.print(temp);

  lcd2.setCursor(1,0);
  lcd2.print("Humidity");
  lcd2.setCursor(1,1);
  lcd2.print(hum);

  // First ultrasonic sensor
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  duration1 = pulseIn(echoPin1, HIGH);
  distance1 = duration1 * 0.034 / 2;
  Serial.print("Sensor 1: ");
  Serial.print(distance1);
  Serial.print(" cm");
  Serial.println(" detected Plant");
 

  // Second ultrasonic sensor
  digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);
  duration2 = pulseIn(echoPin2, HIGH);
  distance2 = duration2 * 0.034 / 2;
  Serial.print("Sensor 2: ");
  Serial.print(distance2);
  Serial.print(" cm");
  Serial.println(" detected Plant");

  delay(10000); // Wait 10 seconds before repeating the loop

}