#define BLYNK_TEMPLATE_ID "TMPL3H5DJkGdo"
#define BLYNK_TEMPLATE_NAME "led int"
#define BLYNK_AUTH_TOKEN "EgNBl8EswSdWpkZ5xqvDGnl7CD3Tzmc3"
#include <WiFiClient.h>
#include <ESP32Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "HX711.h" // Include the HX711 library
#include <BlynkSimpleEsp32.h> // Include the Blynk library

char auth[] ="EgNBl8EswSdWpkZ5xqvDGnl7CD3Tzmc3" ;  // Blynk authentication token
char ssid[] = "Wokwi-GUEST"; // Your Wi-Fi network SSID
char pass[] = "";

// Define the pins
const int dtPin = 32; // DT pin of HX711 connected to digital pin 32
const int sckPin = 33; // SCK pin of HX711 connected to digital pin 33
const int servoPin = 18; // PWM pin for servo motor
const int thresholdWeight = 5; // Threshold weight to differentiate cardboard and plastic

Servo conveyorServo;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column, 2 rows
HX711 scale; // Create an instance of the HX711 library

void setup() {
  Serial.begin(115200);
  conveyorServo.attach(servoPin);
  lcd.init(); // Initialize the LCD
  lcd.backlight(); // Turn on the backlight
  conveyorServo.write(90); // Start with the servo in a neutral position
  scale.begin(dtPin, sckPin); 
  Blynk.begin(auth, ssid, pass); // Initialize Blynk
}

void moveToBin1() {
  conveyorServo.write(45); // Move the conveyor to bin 1 position
  delay(1000); // Wait for 1 second to simulate moving
  //conveyorServo.write(90); // Return to neutral position
}

void moveToBin2() {
  conveyorServo.write(135); // Move the conveyor to bin 2 position
  delay(1000); // Wait for 1 second to simulate moving
  //conveyorServo.write(90); // Return to neutral position
}

BLYNK_WRITE(V1) {
  int weight = param.asInt(); // Read weight from the load cell
  Serial.print("Weight: ");
  Serial.println(weight);

  lcd.clear(); // Clear the previous display
  lcd.setCursor(0, 0); // Set cursor to the first column, first row

  if (weight > thresholdWeight) {
    // It's cardboard, move to bin 1
    lcd.print("Cardboard");
    moveToBin1();
  } else {
    // It's plastic, move to bin 2
    lcd.print("Plastic");
    moveToBin2();
  }
  
  delay(2000);
}

void loop() {
  Blynk.run();
}