#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "HX711.h" // Include the HX711 library

// HX711 circuit wiring
const int dataPin = 26;
const int clockPin = 18;
HX711 scale;
LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the LCD address to 0x27 for a 16 chars and 2 line display
int ButtonTaree = 25;
int LedPin = 32; // Define the pin for the LED
float gramvalue;

float calibration_factor = 420; // This calibration factor is adjusted according to my load cell
float units;

void setup()
{
    scale.begin(dataPin, clockPin);
    Serial.begin(115200);
    lcd.begin(16, 2);
    lcd.init();
    // Print a message to the LCD.
    lcd.backlight();
    scale.set_scale(calibration_factor); // Adjust to this calibration factor
    scale.tare();
    pinMode(ButtonTaree, INPUT_PULLUP);
    pinMode(LedPin, OUTPUT); // Set the LED pin as an output
    digitalWrite(LedPin, LOW); // Ensure the LED is off initially

    xTaskCreatePinnedToCore(Task1, "Task1", 4000, NULL, 1, NULL, 1);
    xTaskCreatePinnedToCore(Task2, "Task2", 4000, NULL, 1, NULL, 1);
    xTaskCreatePinnedToCore(Task3, "Task3", 4000, NULL, 1, NULL, 1); // Create Task3 for LED control
}

void loop()
{
    // Empty loop as tasks handle the functionality
}

void Task1(void* pt)
{
    while (1)
    {   
        long Timestart = millis();
        units = scale.get_units();
        // Round units to two decimal places
        units = round(units * 100.0) / 100.0;

        if (digitalRead(ButtonTaree) == LOW)
        {
            lcd.setCursor(0, 1); // Set cursor to the second row
            lcd.print("   Taring...    ");
            scale.tare();
            lcd.clear();
        }
        long task1_time = millis()-Timestart;
        Serial.print("Execute_time1 =");
        Serial.println(task1_time);    
        delay(500); // Adjust delay to allow for task scheduling
    }
}

void Task2(void* pt)
{
    while (1)
    {
        long Timestart2 = millis();
        lcd.setCursor(0, 0);
        lcd.print("Weight: ");
        lcd.setCursor(8, 0);
        lcd.print(units, 2); // Displays the weight in 2 decimal places
        lcd.print("kg");
        long task2_time = millis()-Timestart2;
        Serial.print("Execute_time2 =");
        Serial.println(task2_time);
        delay(1000); // Update the display every 1000 milliseconds
    }
}

void Task3(void* pt)
{
    while (1)
    {
        long Timestart3 = millis();
        // Check if weight is greater than 3kg and turn on the LED if it is
        if (units > 3.0)
        {
            digitalWrite(LedPin, HIGH); // Turn on the LED
            lcd.setCursor(0, 1); // Set cursor to the second row
            lcd.print("Overload Weight!");
        }
        else
        {
            digitalWrite(LedPin, LOW); // Turn off the LED
            lcd.clear();
        }
        long task3_time = millis()-Timestart3;
        Serial.print("Execute_time3 =");
        Serial.println(task3_time);
        delay(500); // Adjust delay to allow for task scheduling
    }
}