I am currently working on a keypad door lock mechanism (Similar to this project, Keypad door lock).
The issues with the code I have is that the keypad attached to my board does not allow me to type the full password. Only the first value displayed on the LCD screen moves but no value is excepted. Also the buttons used to open and close the servo motor do not operate as intended.
Fritzing diagram
Photo of breadboard
Below is the code I currently have:
//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);
}
}
}
}
To re-iterate, 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.
