#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <HX711.h> 

// Define I2C address for the LCD
#define I2C_ADDR    0x27 
#define LCD_COLUMNS 20
#define LCD_LINES   4

// Initialize the LCD object
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

// DHT Sensor Type 
#define DHTTYPE DHT22 

// DHT Pin (Adjust based on your Wokwi setup)
const int dhtPin = 14; 

// HX711 Pins (Adjust based on your Wokwi setup)
const int doutPin = 5;
const int sckPin = 4;

// Button Pin (Adjust based on your Wokwi setup)
const int buttonPin = 12;

// HX711 object
HX711 scale; 

// DHT object
DHT dht(dhtPin, DHTTYPE); // Correct constructor call

// Flag for displaying temperature or weight
bool showTemperature = false;//

void setup() {
  // Initialize the LCD
  lcd.init();
  lcd.backlight();

  // Initialize  DHT sensor
  dht.begin(); // Call begin() without arguments

  // Initialize the HX711 scale
  scale.begin(doutPin, sckPin);

  // Set the HX711 scale's tare value (zeroing the scale)
  scale.tare(42);
  scale.set_scale(420);

  // Set the button as input with pull-up resistor
  pinMode(buttonPin, INPUT_PULLUP);

  // Initial display
  displayWeight();

}

void loop() {
  // Check for button press
  if (digitalRead(buttonPin) == LOW) {
    showTemperature = !showTemperature;
    if (showTemperature) {
      displayTemperature();
    }
     else {
      displayWeight();
    }
    delay(200); // Debounce the button
  } 
}

// Function to display weight on the LCD
void displayWeight() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Weight: ");
  lcd.print(scale.get_units(), 2); // Print weight with one decimal place
  lcd.print("k.g");
}

// Function to display temperature on the LCD
void displayTemperature() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(dht.readTemperature(), 1); // Print temperature with one decimal place
  lcd.print("C");
  lcd.setCursor(0, 2);
  lcd.print("Vlag: ");
  lcd.print(dht.readHumidity(), 1); // Print temperature with one decimal place
  lcd.print("%");
}
/////////