#include <HX711.h>
#include <ESP32Servo.h>
#include <LiquidCrystal.h>

// Define the pins for the HX711
#define DOUT  21 // HX711 data pin
#define CLK   22 // HX711 clock pin

// Define the servo object
Servo servo1;

// Define the LCD object (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(12, 13, 14, 27, 26, 25);

// Define the calibration factor for the load cell
const float calibration_factor = 1000.0; // Change this value according to your load cell

// Create an instance of the HX711 library
HX711 scale;

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);

  // Initialize the LCD
  lcd.begin(16, 2);

  // Initialize the servo
  servo1.attach(14); // GPIO14

  // Initialize the scale
  scale.begin(DOUT, CLK);
  scale.set_scale(calibration_factor);
  scale.tare(); // Reset the scale to 0

  // Display initial message on LCD
  lcd.clear();
  lcd.print("Weight: ");
}

void loop() {
  // Read weight from the load cell
  float weight = scale.get_units();

  // Clear the LCD screen and move cursor to the beginning
  lcd.setCursor(8, 0); // Set cursor position to print weight value
  lcd.print(weight, 1); // Print weight with 1 decimal place
  lcd.print(" g      "); // Clear any extra characters

  // Check if weight is detected
  if (weight > 0) {
    // Rotate servo motor 360 degrees
    for (int angle = 0; angle < 360; angle += 5) {
      servo1.write(angle % 180); // Use modulo 180 to loop the angles for continuous rotation
      delay(50);  // Adjust delay as necessary for speed control
    }
    // Reset the position
    servo1.write(0);
    delay(1000); // Delay before the next rotation
  }

  delay(1000); // Adjust delay as needed
}