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

const int moisturePin = A0; // Analog pin connected to the soil moisture sensor

// Define the calibration values
const int dryValue = 1023;  // Raw sensor reading when soil is dry
const int wetValue = 300;   // Raw sensor reading when soil is saturated

// Set the LCD address (0x3F for some I2C backpacks)
const int lcdAddress = 0x27;

// Create an instance of the LiquidCrystal_I2C class
LiquidCrystal_I2C lcd(lcdAddress, 20, 4); // 16 columns, 2 rows

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

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud

  // Initialize the LCD
  lcd.init();

  // Turn on the backlight (if available on your LCD)
  lcd.backlight(); // This line turns on the backlight

  // Clear the LCD screen
  lcd.clear();

  // Text settings
  lcd.setCursor(0, 0);
  lcd.print("Moisture: "); // Change to "Moisture: " with a space after the colon

  lcd.setCursor(0, 1);
  lcd.print("Temp: "); // Change to "Temp: " with a space after the colon
 
 

 lcd.setCursor(0, 3);
 lcd.print("HUMID: ");
 

  // Initialize DHT sensor
  dht.begin();
}

void loop() {
  int moistureValue = analogRead(moisturePin); // Read the raw analog value from the sensor

  // Calculate the moisture level in percentage
  float moisturePercentage = map(moistureValue, dryValue, wetValue, 0, 100.0);

  // Display moisture percentage on LCD on the same line
  lcd.setCursor(9, 0); // Set the cursor to the same row at column 9 (after "Moisture: ")
  lcd.print(moisturePercentage, 1); // Print the moisture level in percentage with 1 decimal place

  // Read DHT11 sensor values
  float h = dht.readHumidity();
  float temperature = dht.readTemperature();



  // Display temperature on LCD on the same line
  lcd.setCursor(5, 1); // Set the cursor to the second row at column 5 (after "Temp: ")
  lcd.print(temperature, 1); // Print the temperature with 1 decimal place

  lcd.setCursor(0,3); 
  lcd.print("HUMID: ");lcd.print(h);
  
  // Print temperature to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println("°C");
    delay(2000);
  Serial.print("Humidity: ");
  Serial.print(h,1);
    Serial.println("h");

  delay(5000); // Delay for one second before taking another reading
}