#include "HX711.h"

// Load Cell Pins
#define LOADCELL_DOUT_PIN 32 // GPIO pin connected to HX711 DT
#define LOADCELL_SCK_PIN 33  // GPIO pin connected to HX711 SCK

// LED Pins
#define RED_LED_PIN 23 // GPIO pin connected to Red LED
#define GREEN_LED_PIN 22 // GPIO pin connected to Green LED

// Load Cell Threshold
#define WEIGHT_THRESHOLD 25.0 // 25 kg

// Blinking parameters
#define BLINK_DELAY 500 // Delay for blinking (in milliseconds)

HX711 scale;

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

  // Initialize Load Cell
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(4452); // Set the correct calibration factor for your load cell

  // Set up LED Pins
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);

  // Turn off both LEDs initially
  digitalWrite(RED_LED_PIN, LOW);
  digitalWrite(GREEN_LED_PIN, LOW);
}

void loop() {
  // Measure weight using the load cell
  float weight = scale.get_units(10); // Get the average of 10 readings

  // Control LEDs based on weight
  if (weight > WEIGHT_THRESHOLD) {
    // Weight above threshold: Blink Red LED
    blinkLED(RED_LED_PIN);
    Serial.println("Weight above threshold, Red LED blinking");
  } else {
    // Weight below threshold: Blink Green LED
    blinkLED(GREEN_LED_PIN);
    Serial.println("Weight below threshold, Green LED blinking");
  }

  // Print weight to Serial Monitor
  Serial.print("Weight: ");
  Serial.print(weight);
  Serial.println(" kg");

  delay(1000); // Delay for stability
}

void blinkLED(int ledPin) {
  digitalWrite(ledPin, HIGH); // Turn on LED
  delay(BLINK_DELAY);         // Wait for a while
  digitalWrite(ledPin, LOW);  // Turn off LED
  delay(BLINK_DELAY);         // Wait for a while
}