#include <HX711_ADC.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

HX711_ADC LoadCell(6, 7); // parameters: dt pin 6, sck pin 7;
LiquidCrystal_I2C lcd(0x27, 16, 2); // 0x27 is the i2c address might be different; you can check with Scanner

#define LOADCELL_DOUT_PIN 2
#define LOADCELL_SCK_PIN 3
#define LED_PIN 13
#define WEIGHT_THRESHOLD 20 // Adjust this threshold value according to your requirements

void setup() {
  LoadCell.begin(); // start connection to HX711
  LoadCell.start(2000); // load cells get 2000ms of time to stabilize
  LoadCell.setCalFactor(-910.52); // calibration factor for load cell => dependent on your individual setup
  lcd.init();
  lcd.backlight();

  Serial.begin(9600);
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  LoadCell.update(); // retrieves data from the load cell
  float weightValue = LoadCell.getData(); // get output value

  lcd.setCursor(0, 0); // set cursor to first row
  lcd.print("Weight[g]:"); // print out to LCD
  lcd.setCursor(0, 1); // set cursor to second row
  lcd.print(weightValue); // print out the retrieved value to the second row

  Serial.print("Weight: ");
  Serial.print(weightValue);
  Serial.println(" g");

  if (weightValue > WEIGHT_THRESHOLD) {
    digitalWrite(LED_PIN, HIGH); // Turn on the LED if weight is above the threshold
  } else {
    digitalWrite(LED_PIN, LOW); // Turn off the LED if weight is below the threshold
  }

  delay(1000); // Delay for stable readings