#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <DHT.h>                  // Include the library for the DHT sensor




// Define constants for the DHT sensor
#define DHTPIN 15              // DHT22 sensor is connected to GPIO 15
#define DHTTYPE DHT22          // DHT22 type

DHT dht(DHTPIN, DHTTYPE);           // Initialize DHT sensor

const int ledPin = 13;     // LED pin
LiquidCrystal_I2C lcd(0x27,12,3);
void setup()
{
  Wire.begin(23, 22); // Initialize the I2C communication with SDA pin 23 and SCL pin 22.
  Serial.begin(9600); /// Initialize the serial communication at a baud rate of 9600 bits per second.
  lcd.init();       // initialize the lcd 
  lcd.backlight();    // turn on the backlight
  pinMode(ledPin, OUTPUT); 
  dht.begin();                      // Initialize the DHT sensor
}

void loop()
{

  float temp = dht.readTemperature(); // Read temperature from DHT22
  float hum = dht.readHumidity();     // Read humidity from DHT22

  int16_t i = analogRead(34);
// Use the ternary operator to determine the moisture status based on the value of 'i'.
// If 'i' is less than 300, set 'msg' to "DRY"; if 'i' is greater than 700, set 'msg' to "WET"; otherwise, set 'msg' to "OK".
  String msg = i < 300 ? "DRY" : i > 600 ? "WET" : "OK";

  lcd.clear();
  lcd.print("Moist:");
  lcd.print(i, 1);                // Print humidity with one decimal;

  lcd.print(": ");
  lcd.print(msg);
  if(i<=300){
  digitalWrite(ledPin, HIGH); // will turn on the LED(motor) if the soil is dry (i<300)
  }
  else {
  digitalWrite(ledPin, LOW);
  }

  lcd.setCursor(0, 1);  // Set cursor to the first column and second row
  lcd.print("T:");                  // Print "T:" (Temperature)
  lcd.print(temp);               // Print temperature with one decimal
  lcd.print(" H:");                 // Print " H:" (Humidity)
  lcd.print(hum);                // Print humidity with one decimal;




  delay(500); 

}