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

#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the LCD address to 0x27 for a 16 chars and 2 line display

int sensorPin = A0; // Soil moisture sensor connected to A0
int sensorValue = 0; // Variable to store sensor value
int threshold = 500; // Moisture threshold value

void setup() {
  lcd.begin(16, 2); // Initialize the LCD with 16 columns and 2 rows
  lcd.backlight();
  dht.begin();
  Serial.begin(9600);
}

void loop() {
  sensorValue = analogRead(sensorPin); // Read the value from the sensor
  float temp = dht.readTemperature();
  float humidity = dht.readHumidity();

  lcd.setCursor(0, 0);
  lcd.print("Moisture: ");
  lcd.print(sensorValue);

  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temp);
  lcd.print("C Hum: ");
  lcd.print(humidity);
  lcd.print("%");

  Serial.print("Soil Moisture Value: ");
  Serial.println(sensorValue); // Print the sensor value to the serial monitor
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.println(" *C");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  delay(2000); // Wait for 2 seconds before repeating the loop
}




// Components Needed:
// Arduino Uno: The microcontroller board.

// Soil Moisture Sensor: To measure the moisture level in the soil.

// DHT Sensor: DHT11 or DHT22 to measure temperature and humidity.

// I2C LCD Display: To display the moisture level and temperature.

// Resistor (220 ohm): For the LED (optional).

// Breadboard and Jumper Wires: For connections.

// Power Supply: 9V battery or USB power.

// Step 1: Circuit Diagram
// Here's how you can connect the components:

// Soil Moisture Sensor:

// VCC: Connect to 5V on the Arduino.

// GND: Connect to GND on the Arduino.

// AO (Analog Output): Connect to Analog Pin A0 on the Arduino.

// DHT Sensor:

// VCC: Connect to 5V on the Arduino.

// GND: Connect to GND on the Arduino.

// Data: Connect to Digital Pin 2 on the Arduino.

// I2C LCD Display:

// VCC: Connect to 5V on the Arduino.

// GND: Connect to GND on the Arduino.

// SDA: Connect to A4 on the Arduino.

// SCL: Connect to A5 on the Arduino.