IRLock

Introduction

This project consists in a digital lock, that takes input from an IR remote control and compare passwords, if the password checks, the lock opens or closes, there are a buzzer for sounds, LCD for visualization and a servo for simulating the "action".

There is a video demonstrating the project.

Materials

The materials used are:

Arduino Uno
LCD - 1602
IR Sensor - VS1838B
Remote Control
Buzzer
Potentiometer
Servo - SG90
Jumpers
Breadboard

Circuit

Consult the datasheet of your components to get the right pinout.

The Fritzing file with the schematic can be found in the /doc folder.

Code

IRLock was written with the Visual Studio Code PlatformIO extension, but the code was ported(removed the #include<Arduino.h> line) to Arduino IDE for more convenience.

To make the prototyping faster, I used libraries, but it came with a drawback, I lost the control of the timers from the microcontroller, because of that, lost the possibility to use the "tone" function, so I got the myTone() code from the user @jurs at this arduino forum topic.

Dependencies

These are the needed libraries:

LyquidCrystal
IRremote

Some Highlights

This first section is where you may change the pins used according to your circuit:

#define RECV_PIN 7
#define SERVO_PIN 9
#define BUZZER_PIN 6

#define LCD_RS_PIN 12
#define LCD_ENABLE_PIN 11
#define LCD_D4_PIN 5
#define LCD_D5_PIN 4
#define LCD_D6_PIN 3
#define LCD_D7_PIN 2

This next line sets the IR codes in a vector, you must change this values to the ones your remote control produces.

long unsigned int keys[13] {0x207F08F7, 0x207F8877, 0x207F48B7, 0x207FC837, 0x207F28D7, 0x207FA857, 0x207F6897, 0x207FE817, 0x207F18E7, 0x207F9867, 0x207F38C7, 0x207FF807, 0x207F906F};

To make life easier, these are the positions of the vector:

[0] to [9] are the numbers buttons (0 to 9)
[10] is the Erase button
[11] is the Enter button
[12] is the New Password button

Issues

Sometimes the system detects the IR signal, but can't decode it correctly. (probably a remote control problem)

Contribute

If you have any suggestion to improve this project, let me know. :)

gustavoaguilar/IRLock