DIY Vending Machine Correct Program

DIY VENDING MACHINE

Circuit Diagram:-

Program:-

#include <LiquidCrystal.h> 

#include <Servo.h>

LiquidCrystal lcd(27, 26, 25, 24, 23, 22); 

Servo servo1, servo2, servo3, servo4;   

#define dirPinVertical 0

#define stepPinVertical 1

#define dirPinHorizontal 2

#define stepPinHorizontal 3

#define coinDetector 9

#define button1 13

#define button2 12

#define button3 11

#define button4 10

#define microSwitchV 15

#define microSwitchH 14

int buttonPressed;

void setup() {

  lcd.begin(16, 2);

  servo1.attach(4);

  servo2.attach(5);

  servo3.attach(6);

  servo4.attach(7);

  pinMode(dirPinVertical, OUTPUT);

  pinMode(stepPinVertical, OUTPUT);

  pinMode(dirPinHorizontal, OUTPUT);

  pinMode(stepPinHorizontal, OUTPUT);

  pinMode(coinDetector, INPUT);

  pinMode(button1, INPUT_PULLUP);

  pinMode(button2, INPUT_PULLUP);

  pinMode(button3, INPUT_PULLUP);

  pinMode(button4, INPUT_PULLUP);

  pinMode(microSwitchV, INPUT_PULLUP);

  pinMode(microSwitchH, INPUT_PULLUP);

  digitalWrite(dirPinVertical, HIGH); 

  while (true) {

    if (digitalRead(microSwitchV) == LOW) { 

      moveUp(70);

      break;

    }

    digitalWrite(stepPinVertical, HIGH);

    delayMicroseconds(300);

    digitalWrite(stepPinVertical, LOW);

    delayMicroseconds(300);

  }

  digitalWrite(dirPinHorizontal, LOW);

  while (true) {

    if (digitalRead(microSwitchH) == LOW) {

      moveLeft(350);

      break;

    }

    digitalWrite(stepPinHorizontal, HIGH);

    delayMicroseconds(300);

    digitalWrite(stepPinHorizontal, LOW);

    delayMicroseconds(300);

  }

}

void loop() {

  lcd.clear();

  lcd.setCursor(0, 0);

  lcd.print("Insert the coin!");

  while (true) {

    if (digitalRead(coinDetector) == LOW) { 

      break;

    }

  }

  delay(10);

  lcd.clear();

  lcd.setCursor(0, 0);

  lcd.print("Select the item you want");

  lcd.setCursor(0, 1);

  lcd.print(" 1, 2, 3 or 4?");

  while (true) {

    if (digitalRead(button1) == LOW) {

      buttonPressed = 1;

      break;

    }

    if (digitalRead(button2) == LOW) {

      buttonPressed = 2;

      break;

    }

    if (digitalRead(button3) == LOW) {

      buttonPressed = 3;

      break;

    }

    if (digitalRead(button4) == LOW) {

      buttonPressed = 4;

      break;

    }

  }

  lcd.clear();

  lcd.setCursor(0, 0);

  lcd.print("Please wait");

  switch (buttonPressed) {

    case 1:

      moveUp(4900); 

      delay(200);

      moveLeft(1700); 

      delay(300);

      servo1.writeMicroseconds(2000); 

      delay(950);

      servo1.writeMicroseconds(1500); 

      delay(500);

      moveRight(1700);

      delay(200);

      moveDown(4900);

      break;

    case 2:

      moveUp(4900);

      delay(200);

      servo2.writeMicroseconds(2000); 

      delay(950);

      servo2.writeMicroseconds(1500); 

      delay(500);

      moveDown(4900);

      break;

    case 3:

      moveUp(2200); 

      delay(200);

      moveLeft(1700);

      delay(300);

      servo3.writeMicroseconds(2000); 

      delay(950);

      servo3.writeMicroseconds(1500); 

      delay(500);

      moveRight(1700);

      delay(200);

      moveDown(2200);

      break;

    case 4:

      moveUp(2200); 

      delay(200);

      servo4.writeMicroseconds(2000); 

      delay(950);

      servo4.writeMicroseconds(1500);  

      delay(500);

      moveDown(2200);

      break;

  }

  

  lcd.clear(); 

  lcd.setCursor(0, 0);

  lcd.print("Delivered Sucessfully"); 

  delay(2000);

}

void moveUp (int steps) {

  digitalWrite(dirPinVertical, LOW);

  for (int x = 0; x < steps; x++) {

    digitalWrite(stepPinVertical, HIGH);

    delayMicroseconds(300);

    digitalWrite(stepPinVertical, LOW);

    delayMicroseconds(300);

  }

}

void moveDown (int steps) {

  digitalWrite(dirPinVertical, HIGH);

  for (int x = 0; x < steps; x++) {

    digitalWrite(stepPinVertical, HIGH);

    delayMicroseconds(300);

    digitalWrite(stepPinVertical, LOW);

    delayMicroseconds(300);

  }

}

void moveLeft (int steps) {

  digitalWrite(dirPinHorizontal, HIGH);

  for (int x = 0; x < steps; x++) {

    digitalWrite(stepPinHorizontal, HIGH);

    delayMicroseconds(300);

    digitalWrite(stepPinHorizontal, LOW);

    delayMicroseconds(300);

  }

}

void moveRight (int steps) {

  digitalWrite(dirPinHorizontal, LOW);

  for (int x = 0; x < steps; x++) {

    digitalWrite(stepPinHorizontal, HIGH);

    delayMicroseconds(300);

    digitalWrite(stepPinHorizontal, LOW);

    delayMicroseconds(300);

  }

}