RFID DOOR LOCK SYSTEM

// Include Libraries
#include "Arduino.h"
#include "LiquidCrystal_PCF8574.h"
#include "RFID.h"
#include "Servo.h"
#include "Button.h"


// Pin Definitions
#define RFID_PIN_RST  2
#define RFID_PIN_SDA  10
#define SERVO9G_PIN_SIG 3
#define REFLECTIVEIR_PIN_COLL 4



// Global variables and defines
// There are several different versions of the LCD I2C adapter, each might have a different address.
// Try the given addresses by Un/commenting the following rows until LCD works follow the serial monitor prints. 
// To find your LCD address go to: http://playground.arduino.cc/Main/I2cScanner and run example.
#define LCD_ADDRESS 0x3F
//#define LCD_ADDRESS 0x27
// Define LCD characteristics
#define LCD_ROWS 2
#define LCD_COLUMNS 16
#define SCROLL_DELAY 150
#define BACKLIGHT 255
const int servo9gRestPosition   = 20;  //Starting position
const int servo9gTargetPosition = 150; //Position when event is detected
// object initialization
LiquidCrystal_PCF8574 lcdI2C;
RFID rfid(RFID_PIN_SDA,RFID_PIN_RST);
Servo servo9g;
Button ReflectiveIR(REFLECTIVEIR_PIN_COLL);


// define vars for testing menu
const int timeout = 10000;       //define timeout of 10 sec
char menuOption = 0;
long time0;

// Setup the essentials for your circuit to work. It runs first every time your circuit is powered with electricity.
void setup() 
{
    // Setup Serial which is useful for debugging
    // Use the Serial Monitor to view printed messages
    Serial.begin(9600);
    while (!Serial) ; // wait for serial port to connect. Needed for native USB
    Serial.println("start");
    
    // initialize the lcd
    lcdI2C.begin(LCD_COLUMNS, LCD_ROWS, LCD_ADDRESS, BACKLIGHT); 
    //initialize RFID module
    rfid.init();
    servo9g.attach(SERVO9G_PIN_SIG);
    servo9g.write(servo9gRestPosition);
    delay(100);
    servo9g.detach();
    ReflectiveIR.init();
    menuOption = menu();
    
}

// Main logic of your circuit. It defines the interaction between the components you selected. After setup, it runs over and over again, in an eternal loop.
void loop() 
{
    
    
    if(menuOption == '1') {
    // LCD 16x2 I2C - Test Code
    // The LCD Screen will display the text of your choice.
    lcdI2C.clear();                          // Clear LCD screen.
    lcdI2C.print("  Circuito.io  ");                   // Print print String to LCD on first line
    lcdI2C.selectLine(2);                    // Set cursor at the begining of line 2
    lcdI2C.print("     Rocks!  ");                   // Print print String to LCD on second line
    delay(1000);

    }
    else if(menuOption == '2') {
    // RFID Card Reader - RC522 - Test Code
    //Read RFID tag if present
    String rfidtag = rfid.readTag();
    //print the tag to serial monitor if one was discovered
    rfid.printTag(rfidtag);

    }
    else if(menuOption == '3') {
    // 9G Micro Servo - Test Code
    // The servo will rotate to target position and back to resting position with an interval of 500 milliseconds (0.5 seconds) 
    servo9g.attach(SERVO9G_PIN_SIG);         // 1. attach the servo to correct pin to control it.
    servo9g.write(servo9gTargetPosition);  // 2. turns servo to target position. Modify target position by modifying the 'ServoTargetPosition' definition above.
    delay(500);                              // 3. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
    servo9g.write(servo9gRestPosition);    // 4. turns servo back to rest position. Modify initial position by modifying the 'ServoRestPosition' definition above.
    delay(500);                              // 5. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
    servo9g.detach();                    // 6. release the servo to conserve power. When detached the servo will NOT hold it's position under stress.
    }
    else if(menuOption == '4') {
    // Reflective IR Sensor TCRT5000L - Test Code
    //read Reflective IR Sensor. 
    //if the sensor detects an echo function will return LOW (0). 
    //if it is not detect an echo function will return HIGH (1).
    bool ReflectiveIR_Val = ReflectiveIR.read();
    Serial.print(F("Val: ")); Serial.println(ReflectiveIR_Val);
    }
    
    if (millis() - time0 > timeout)
    {
        menuOption = menu();
    }
    
}



// Menu function for selecting the components to be tested
// Follow serial monitor for instrcutions
char menu()
{

    Serial.println(F("\nWhich component would you like to test?"));
    Serial.println(F("(1) LCD 16x2 I2C"));
    Serial.println(F("(2) RFID Card Reader - RC522"));
    Serial.println(F("(3) 9G Micro Servo"));
    Serial.println(F("(4) Reflective IR Sensor TCRT5000L"));
    Serial.println(F("(menu) send anything else or press on board reset button\n"));
    while (!Serial.available());

    // Read data from serial monitor if received
    while (Serial.available()) 
    {
        char c = Serial.read();
        if (isAlphaNumeric(c)) 
        {   
            
            if(c == '1') 
          Serial.println(F("Now Testing LCD 16x2 I2C"));
        else if(c == '2') 
          Serial.println(F("Now Testing RFID Card Reader - RC522"));
        else if(c == '3') 
          Serial.println(F("Now Testing 9G Micro Servo"));
        else if(c == '4') 
          Serial.println(F("Now Testing Reflective IR Sensor TCRT5000L"));
            else
            {
                Serial.println(F("illegal input!"));
                return 0;
            }
            time0 = millis();
            return c;
        }
    }
}