// Libraries
#include <HX711.h> // Load cell library

// Constants
const int LOAD_CELL_DOUT_PIN = 2;   // DOUT pin of HX711
const int LOAD_CELL_SCK_PIN = 3;    // SCK pin of HX711
const int BUZZER_PIN = 4;           // Buzzer pin

const int CALIBRATION_FACTOR = 1024; // Calibration factor for your load cell
const int THRESHOLD = 50000;         // Threshold weight in grams (50 kg = 50000 g)

// Variables
HX711 scale;

// Setup
void setup() {
  Serial.begin(9600);

  scale.begin(LOAD_CELL_DOUT_PIN, LOAD_CELL_SCK_PIN);
  scale.set_scale(CALIBRATION_FACTOR);

  pinMode(BUZZER_PIN, OUTPUT);
}

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

  if (weight > THRESHOLD) {
    // Activate the buzzer
    digitalWrite(BUZZER_PIN, HIGH);
    delay(1000);
    digitalWrite(BUZZER_PIN, LOW);

    // You can add more actions here, such as sending an alert message.

    // Wait for some time to prevent continuous alerts
    delay(5000);
  }

  delay(100);
}