Arduino Model of a Belt Conveyor

//2020 Craftybin.blogspot.com
//Author : Chathura H.

#include "HX711.h"
const int LOADCELL_DOUT_PIN = 2;
const int LOADCELL_SCK_PIN = 3;
HX711 scale;

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

#define plus A2
#define minus A1
#define enter A0

const int motorPin1  = 5;
const int motorPin2  = 6;
const int motorPin3  = 7;
const int motorPin4  = 8;
const int motorPin5  = 9;
const int motorPin6  = 10;
const int motorPin7  = 11;
const int motorPin8  = 12;

int IR = 13;
int count1 = 0;
int count2 = 0;
int detect1 = HIGH;
int detect2 = LOW;
int detect3 = LOW;
int detect4 = LOW;

void setup()
{
  lcd.begin();
  pinMode(motorPin1, OUTPUT);
  pinMode(motorPin2, OUTPUT);
  pinMode(motorPin3, OUTPUT);
  pinMode(motorPin4, OUTPUT);
  pinMode(motorPin5, OUTPUT);
  pinMode(motorPin6, OUTPUT);
  pinMode(motorPin7, OUTPUT);
  pinMode(motorPin8, OUTPUT);
  pinMode(IR,INPUT);
  pinMode(plus,INPUT);
  pinMode(minus,INPUT);
  pinMode(enter,INPUT);
  Serial.begin(9600);
  delay(100);
  
  Serial.println("Product Weight ");
  Serial.println("Measuring...");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(2280.f);
  scale.tare();
  lcd.backlight();
  lcd.print("Product Weight");
  delay(1000);
  lcd.clear();
  
}


void loop()
{
  detect1 = digitalRead(IR); 
  detect2 = digitalRead(plus);
  detect3 = digitalRead(minus); 
  detect4 = digitalRead(enter);

  Serial.print("one reading:\t");
  Serial.print(scale.get_units(), 1);
  Serial.print("\t| average:\t");
  Serial.println(scale.get_units(10), 1);

  scale.power_down();       
  delay(100);
  scale.power_up();

  if (detect1 == LOW) {    
    if(count1 < 10) 
      count1++; 
    else
      count1 = 0;
  lcd.backlight();
  lcd.print("COUNTER =");
  delay(500);
  lcd.clear();
  lcd.print(count1);
  delay(500);
  lcd.clear();
  }
  

  if (detect2 == HIGH) {
    if(count2 < 10) 
      count2++; 
    else
      count2 = 0;
  lcd.backlight();
  lcd.print("Set Count");
  delay(500);
  lcd.clear();
  lcd.print(count2);
  delay(500);
  lcd.clear();
  }
  

  if (detect3 == HIGH) {       
    if(count2 < 10) 
      count2--; 
    else
      count2 = 0;
   lcd.backlight();
  lcd.print("Set Count");
  delay(500);
  lcd.clear();
  lcd.print(count2);
  delay(500);
  lcd.clear();
  }
  

  if (detect4 == HIGH){

  if (count2 > count1){
    digitalWrite(motorPin1,HIGH);
    digitalWrite(motorPin2,HIGH);
    digitalWrite(motorPin3,HIGH);
    digitalWrite(motorPin4,HIGH);
    lcd.backlight();
    lcd.print(" Counting =");
    delay(500);
    lcd.clear();
    lcd.print(count1);
    delay(500);
    lcd.clear();   
  }

  else if (count2 <= count1){
    digitalWrite(motorPin1,LOW);
    digitalWrite(motorPin2,LOW);
    digitalWrite(motorPin3,LOW);
    digitalWrite(motorPin4,LOW);
  lcd.backlight();
  lcd.print("Count Completed");
  delay(500);
  lcd.clear();
  lcd.print(count1);
  delay(500);
  lcd.clear();    
  }
  }

  else {
    digitalWrite(motorPin1,LOW);
    digitalWrite(motorPin2,LOW);
    digitalWrite(motorPin3,LOW);
    digitalWrite(motorPin4,LOW);    
  }

if (scale.get_units() > 1200 || scale.get_units() < 800)
  {
    digitalWrite(motorPin4,LOW);
    digitalWrite(motorPin5,LOW);
    
    digitalWrite(motorPin6,HIGH);
    digitalWrite(motorPin7,LOW);
    delay(1000);
    digitalWrite(motorPin6,LOW);
    digitalWrite(motorPin7,HIGH);
    delay(1000);
   lcd.backlight();
  lcd.print(" Weight Unmatched");
  delay(500);
  lcd.clear();
  lcd.print("Rejecting");
  delay(500);
  lcd.clear();
}

else {
    digitalWrite(motorPin6,HIGH);
    digitalWrite(motorPin7,LOW);
    digitalWrite(motorPin6,LOW);
    digitalWrite(motorPin7,LOW);
}
}