Final Project

    #include "HX711.h"
    
    #define DOUT  3
    #define CLK  2
    
    HX711 scale(DOUT, CLK);
    
    float calibration_factor = -750; //-7050 worked for my 440lb max scale setup
    
    void setup() {
      Serial.begin(9600);
      Serial.println("HX711 calibration sketch");
      Serial.println("Remove all weight from scale");
      Serial.println("After readings begin, place known weight on scale");
      Serial.println("Press + or a to increase calibration factor");
      Serial.println("Press - or z to decrease calibration factor");
    
      scale.set_scale();
      scale.tare(); //Reset the scale to 0
    
      long zero_factor = scale.read_average(); //Get a baseline reading
      Serial.print("Zero factor: "); //This can be used to remove the need to tare the scale. Useful in permanent scale projects.
      Serial.println(zero_factor);
    }
    
    void loop() {
    
      scale.set_scale(calibration_factor); //Adjust to this calibration factor
    
      Serial.print("Reading: ");
      Serial.print(scale.get_units(), 1);
      Serial.print(" g"); //Change this to kg and re-adjust the calibration factor if you follow SI units like a sane person
      Serial.print(" calibration_factor: ");
      Serial.print(calibration_factor);
      Serial.println();
    
      if(Serial.available())
      {
        char temp = Serial.read();
        if(temp == '+' || temp == 'a')
          calibration_factor += 10;
        else if(temp == '-' || temp == 'z')
          calibration_factor -= 10;
      }
    }
    
    

    /*
       Author :- Hari Krishnan
       EASY Cast Final Project Code
       2018 Fab Academy
    */
    
    
    #include "HX711.h"
    #include <LiquidCrystal.h>
    
    #define calibration_factor -950
    
    #define DOUT  4 // changed to D4
    #define CLK  9
    
    #define SV1 6 // Solinoid valve 1
    #define SV2 5 // Solinoid valve 2
    
    #define DIR 8   //stepper Direction pin
    #define STP 7  //stepper Step pin
    
    #define led 3 // In-built led
    
    int quatity , material ;  // User defined Quatity and Material
    char startSignal ;
    
    HX711 scale(DOUT, CLK);
    
    
    const int rs = A0  , en = A1, d4 = A2, d5 = A3 ,  d6 = A4, d7 = A5 ;
    LiquidCrystal lcd (rs , en , d4 , d5 , d6 , d7);
    
    void setup()
    {
      Serial.begin(9600);
      lcd.begin(16, 2);
      lcd.print("--NEAT Cast--");
      Serial.println("NEAT Cast ");
      scale.set_scale(calibration_factor); //This value is obtained by using the SparkFun_HX711_Calibration sketch
      scale.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0
    
      pinMode(SV1 , OUTPUT);
      pinMode(SV2 , OUTPUT);    // set Solinoid valve as output
    
      pinMode(DIR , OUTPUT);
      pinMode(STP , OUTPUT);  // set Setpper DIR and STP as Output
    
      pinMode(led, OUTPUT);
    
    }
    void loop()
    {
      lcd.setCursor(0, 1);
      lcd.print("Waiting for Input");
      if (Serial.available() > 0)
      {
        quatity = Serial.read();
        material = Serial.read();
        startSignal = Serial.read();
    
        if (startSignal == 'A') { // Check that user is pressed the START Button
        Serial.println("Receved Start Signal and checking wheight");
          digitalWrite(led, HIGH);
          int weight = scale.get_units();
          lcd.clear();
          lcd.setCursor(0, 1);
          lcd.print("Resin");
          if (weight > 15)
          {
            do {
              //Start Fisrt Solinoid Valve
              Serial.println("Weight is Gretarthan 5 gram and Starting process");
              digitalWrite(SV1, HIGH);
              delay(3000);
              digitalWrite(SV1, LOW);
              delay(3000);
            } while (weight == quatity / 2);
    
            //Move stepper for Second Material 
            digitalWrite(DIR, HIGH);
            for (int i = 0; i <= 400 ; i++)
            {
              digitalWrite(STP , HIGH);
              delay(3);
              digitalWrite(STP , LOW);
              delay(3);
            }
    
            do {
              //Start Second Solinoid Valve
              digitalWrite(SV2, HIGH);
              delay(3000);
              digitalWrite(SV2, LOW);
              delay(3000);
            } while (weight == quatity);
    
            //Move setpper to home position
            digitalWrite(DIR, LOW); // change Direction
            for (int i = 0; i <= 400 ; i++)
            {
              digitalWrite(STP , HIGH);
              delay(3);
              digitalWrite(STP , LOW);
              delay(3);
            }
          }
    
    
        }
        else {
          Serial.println("Blutooth Transmisson faild");
          digitalWrite(led, LOW);
        }
      }
      
    }