#include <Wire.h> 
#include <LiquidCrystal.h>
#include <Servo.h>
#include <DHT.h>

Servo myServo;  // Create a servo object

//LCD Connections 
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

//Soil moisture sensor analog input
const int analogPin = A0;  // Analog input pin

//Code for the LED 
const int ledPin1 = 3;  // Pin connected to the first LED
const int ledPin2 = 6;

//code for DHTT22
#define DHTPIN 13     // Pin connected to the DHT22 sensor
#define DHTTYPE DHT22   // DHT sensor type
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);

  //DHTT22
  dht.begin();          // Initialize the DHT sensor

  //LED set to output
  pinMode(ledPin1, OUTPUT);  // Set the LED pins as output
  pinMode(ledPin2, OUTPUT);
  
  //Servo set to pin 4 
  myServo.attach(4); 
  
  // Customized chip soil moisture sensor set to input mode 
  pinMode(analogPin, INPUT);  // Set the analog pin A0 as input
  
  
  //LCD Display startup
  lcd.begin(16, 2);
  lcd.print("Smart water!");
  delay(2000);
 
}

void loop() {
 //Setting analog pin to sensorValue variable 
 int sensorValue =analogRead(analogPin);

    // Customize your chip's behavior based on the sensor value
    if (sensorValue > 135) {
      digitalWrite(ledPin1, LOW);    // Turn off the RED LED 
      digitalWrite(ledPin2, HIGH);   //Turn on the Green LED 

      //LCD Display when the soil is wet 
      lcd.clear();
      lcd.print("Soil: ");
      lcd.print("WET");

      // Move the servo to the 90-degree position which is opening a tap to start watering 
      myServo.write(0);

    } else {
      
      digitalWrite(ledPin1, HIGH);    // Turn ON the red LED
      digitalWrite(ledPin2,   LOW);   //Turn off the green LED 

      // LCD Display when the soil is dry 
      lcd.clear();
      lcd.print("Soil: ");
      lcd.print("DRY");

      //Move the servo to the 0-degree position. Which is closing the tap to stop watering 
      myServo.write(0);
    }
    delay(500);

  // Display of exterior condition that affect a plant 
  float temperature = dht.readTemperature();   // Read temperature in Celsius
  float humidity = dht.readHumidity();         // Read humidity

  //Displaying temperature 
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C");
   
  //Displaying Humidity
  Serial.print("   Humidity: ");
  Serial.print(humidity);
  Serial.println(" %"); 


 
}