#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(14, DHT22);

const int ledPinSoil = 2;   // Soil moisture sensor LED pin
const int ledPinTemp = 15;  // Temperature sensor LED pin

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(ledPinSoil, OUTPUT);
  pinMode(ledPinTemp, OUTPUT);

  lcd.setCursor(1, 0);
  lcd.print("RAGHU");
  lcd.setCursor(1, 1);
  lcd.print("  6705223035   ");
  delay(500);
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("ESP 32");
  lcd.setCursor(1, 1);
  lcd.print("SOIL MOISTURE");
  delay(500);
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("JASMINE");
  delay(700);
  lcd.clear();
}

void loop() {
  // Soil moisture sensor
  int16_t soilMoisture = analogRead(34);
  String soilStatus = soilMoisture <50 ? "DRY" : soilMoisture >50? "WET" : "OK";

  lcd.clear();
  lcd.print("Soil: ");
  lcd.print(soilStatus);

  if (soilMoisture <= 300) {
    digitalWrite(ledPinSoil, HIGH);  // Turn on the LED if the soil is dry
  } else {
    digitalWrite(ledPinSoil, LOW);
  }
   delay(2000);

 

  // Temperature sensor
  float temperature = dht.readTemperature();

  if (!isnan(temperature)) {
    lcd.setCursor(0, 0);
    lcd.print("Temperature: ");
    lcd.print(temperature);
    lcd.print("°C");

    if (temperature > 38.0) {
      digitalWrite(ledPinTemp, HIGH);  // Turn on the LED if temperature is high
      lcd.setCursor(0, 1);
      lcd.print("temperature high    ");
    } else {
      digitalWrite(ledPinTemp, LOW);   // Turn off the LED
      lcd.setCursor(0, 1);
      lcd.print("temp normal");
    }
  } else {
    lcd.setCursor(0, 0);
    lcd.print("Error reading DHT sensor");
    digitalWrite(ledPinTemp, LOW);  // Turn off the LED in case of an error
  }

  delay(2000);  // Delay for 2 seconds before reading again
}