#include <Arduino.h>

// Define a new data type
enum state {
  DOWN,
  UP,
  STOP,
  LOWER,
  RAISE
};

// Variable of the new data type
state position = DOWN;

int GSM1 = 10;

// Define pin connections


#define Button_Raise_Pin 1
#define LimitSwitch_Up_Pin 2
#define Stop_Pin 33
#define Button_Lower_Pin 5
#define LimitSwitch_Down_Pin 6
#define Door_Raise_Pin 3
#define Door_Up_Pin 4
#define Door_Lower_Pin 7
#define Door_Down_Pin 8

// Define variables
bool Button_Raise = LOW;
bool LimitSwitch_Up = LOW;
bool Button_Lower = LOW;
bool LimitSwitch_Down = LOW;
bool Button_Stop = LOW;

void setup() {

  pinMode(GSM1, OUTPUT);

  // UP
  pinMode(Button_Raise_Pin, INPUT_PULLUP);
  pinMode(LimitSwitch_Up_Pin, INPUT_PULLUP);
  pinMode(Door_Raise_Pin, OUTPUT);
  pinMode(Door_Up_Pin, OUTPUT);

  // DOWN
  pinMode(Button_Lower_Pin, INPUT_PULLUP);
  pinMode(LimitSwitch_Down_Pin, INPUT_PULLUP);
  pinMode(Door_Lower_Pin, OUTPUT);
  pinMode(Door_Down_Pin, OUTPUT);

  // STOP
  pinMode(Stop_Pin, INPUT_PULLUP);

  analogWrite(GSM2, 100);
}

void loop() {
  // Read input pins
  Button_Raise = !digitalRead(Button_Raise_Pin);
  LimitSwitch_Up = !digitalRead(LimitSwitch_Up_Pin);
  Button_Lower = !digitalRead(Button_Lower_Pin);
  LimitSwitch_Down = !digitalRead(LimitSwitch_Down_Pin);
  Button_Stop = !digitalRead(Stop_Pin);

  // State machine
  switch (position) {
    case DOWN:
      digitalWrite(Door_Lower_Pin, LOW);
      digitalWrite(Door_Down_Pin, HIGH);
      if (Button_Raise == HIGH) {
        position = RAISE;
      }
      break;

    case RAISE:
      digitalWrite(Door_Down_Pin, LOW);
      digitalWrite(Door_Raise_Pin, HIGH);
      if (LimitSwitch_Up == HIGH) {
        position = UP;
      } else if (Button_Stop == HIGH) {
        position = STOP;
      }
      break;

    case UP:
      digitalWrite(Door_Raise_Pin, LOW);
      digitalWrite(Door_Up_Pin, HIGH);
      if (Button_Lower == HIGH) {
        position = LOWER;
      }
      break;

    case LOWER:
      digitalWrite(Door_Up_Pin, LOW);
      digitalWrite(Door_Lower_Pin, HIGH);
      if (LimitSwitch_Down == HIGH) {
        position = DOWN;
      } else if (Button_Stop == HIGH) {
        position = STOP;
      }
      break;

    case STOP:
      digitalWrite(Door_Raise_Pin, LOW);
      digitalWrite(Door_Lower_Pin, LOW);
      if (Button_Raise == HIGH) {
        position = RAISE;
      } else if (Button_Lower == HIGH) {
        position = LOWER;
      }
    break;
  }
}