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

const int ld_cell = 2;
const int ld_sck = 4;
const int RED = 13; // Assuming you have an LED connected to pin 13.

HX711 scale;
LiquidCrystal_I2C lcd(0x27, 16, 2);
float Weight = 0.0; // Use float for weight measurement
float Tank_weight = 6.2;

void setup() {
  Serial.begin(115200);
  scale.begin(ld_cell, ld_sck);
  lcd.init();
  lcd.backlight();
  pinMode(RED, OUTPUT); // Set the red LED pin as an output
}

void loop() {
  float Wei = 0.0; // Initialize Wei as a float

  for (int x = 0; x < 100; x++) {
    Wei += scale.read(); // Use scale.read() to read from the HX711
    //delay(10); // Delay between readings
  }
  Wei = (Wei-Tank_weight) * 100.0;
  //Wei = (Wei / 100.0 - Tank_weight) * 100.0; // Calculate the average and convert to percentage

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Gas Level");

  lcd.setCursor(0,1);
  lcd.print(Wei);

  if (Wei < 10.0) {
    Serial.println("Gas Level Low");
    digitalWrite(RED, HIGH);
    lcd.setCursor(0, 2); // Set cursor position for the second line
    lcd.print("Gas Level is Low");

  } else {
    digitalWrite(RED, LOW);
    lcd.setCursor(0, 2); // Set cursor position for the second line
    lcd.print("Gas Level is Normal");
  }
  Serial.print("Gas Level: ");
  Serial.println(Wei);


  //delay(1000); // Delay for 1 second before the next reading
}