Currently working on a keypad door lock mechanism, similar to this project, Keypad door lock.
Below is the code I currently have:
/*
I've used a i2c LCD screen module and 9g servo motor.
*/
//LCD config
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
#include <Servo.h>
#include <Keypad.h>
//Variables
int mot_min = 90; //min servo angle (set yours)
int mot_max = 180; //Max servo angle (set yours)
int character = 0;
int activated =0;
char Str[16] = {' ', ' ', ' ', ' ', ' ', ' ', '-', '*', '*', '*', ' ', ' ', ' ', ' ', ' ', ' '};
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
//Pins
Servo myservo;
int buzzer=11; //pin for the buzzer beep
int external = 12; //pin to inside open
int internal = 13; //pin to inside close
//Keypad config
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
{'1','4','7','*'},
{'2','5','8','0'},
{'3','6','9','#'},
{'A','B','C','D'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the keypad
//initialize an instance of class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
void setup(){
myservo.attach(10); //attach the servo to pin D10
pinMode(buzzer,OUTPUT);
pinMode(external,INPUT);
pinMode(internal,INPUT);
//Init the screen and print the first text
lcd.init();
lcd.backlight();
lcd.clear();
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(" -*** ");
//put the servo in the close position first
myservo.write(mot_min);
}
void loop(){
///////////////EMERGENCY OPEN/CLOSE/////////
if (digitalRead(external) == LOW) // if (digitalRead(external))
{
myservo.write(mot_max);
lcd.clear();
lcd.setCursor(2,0);
lcd.print("INSIDE OPEN");
activated = 2;
analogWrite(buzzer,240);
delay(250);
analogWrite(buzzer,200);
delay(250);
analogWrite(buzzer,180);
delay(250);
analogWrite(buzzer,250);
delay(250);
analogWrite(buzzer,LOW);
lcd.clear();
lcd.setCursor(4,0);
lcd.print("WELLCOME");
lcd.setCursor(2,1);
lcd.print("ELECTRONOOBS");
lcd.clear();
lcd.setCursor(3,0);
lcd.print("DOOR OPEN");
lcd.setCursor(2,1);
lcd.print("ELECTRONOOBS");
delay(500);
}
if (digitalRead(internal) == LOW) // if (digitalRead(internal))
{
myservo.write(mot_min);
activated = 0;
character=0;
Str[6]= '-';
Str[7]= '*';
Str[8]= '*';
Str[9]= '*';
Str[10]= ' ';
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
///////////////KEYPAD OPEN/CLOSE////////////
char customKey = customKeypad.getKey(); //this function reads the presed key
if (customKey != NULL){ // if (customKey)
if (character ==0)
{
Serial.println(customKey);
Str[6]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==1)
{
Serial.println(customKey);
Str[7]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==2) {
{
Serial.println(customKey);
Str[8]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==3)
{
Serial.println(customKey);
Str[9]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==4)
{
Serial.println(customKey);
Str[10]= customKey;
activated=1;
}
character=character+1;
}
if (activated == 1)
{
/*Change your password below!!!
Change each of Str[6], Str[7], Str[8], Str[9]*/
// if (Str[10] = 'A' && ...)
if(Str[10]=='A' && character==5 && Str[6]=='3' && Str[7]=='0' && Str[8]=='0' && Str[9]=='7' )
{
myservo.write(mot_max);
lcd.clear();
lcd.setCursor(4,0);
lcd.print("ACCEPTED");
activated = 2;
analogWrite(buzzer,240);
delay(250);
analogWrite(buzzer,200);
delay(250);
analogWrite(buzzer,180);
delay(250);
analogWrite(buzzer,250);
delay(250);
analogWrite(buzzer,LOW);
delay(1000);
lcd.clear();
lcd.setCursor(4,0);
lcd.print("WELLCOME");
delay(500);
lcd.setCursor(2,1);
lcd.print("ELECTRONOOBS");
delay(1000);
lcd.clear();
lcd.setCursor(3,0);
lcd.print("DOOR OPEN");
lcd.setCursor(2,1);
lcd.print("ELECTRONOOBS");
}
else
{
lcd.clear();
lcd.setCursor(1,0);
lcd.print("PASSWORD ERROR");
lcd.setCursor(3,1);
lcd.print("TRY AGAIN");
analogWrite(buzzer,150);
delay(3000);
analogWrite(buzzer,LOW);
character=0;
Str[6]= '-';
Str[7]= '*';
Str[8]= '*';
Str[9]= '*';
Str[10]= ' ';
activated = 0;
lcd.clear();
lcd.setCursor(4,0);
lcd.print("PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
}
if (activated == 2)
{
if(customKey == 'B' )
{
myservo.write(mot_min);
activated = 0;
character=0;
Str[6]= '-';
Str[7]= '*';
Str[8]= '*';
Str[9]= '*';
Str[10]= ' ';
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
}
}
}
With this code now the LCD screen displays PASSWORD but when I enter the password into the keypad only the first number changes value and it does not move to the second value.
