Hello all, in the below code my LED on OP PIN 13 doesn't turn on if not provided delay...
/*
Matrix Keypad Combination Lock Demo
keypad-demo-lock.ino
Combination lock using 4x4 matrix membrane keypad with Arduino
Results on LCD display
Drives relay
DroneBot Workshop 2020
https://dronebotworkshop.com
Based upon code from https://www.circuitbasics.com/
*/
// Include Arduino Wire library for I2C
#include <Wire.h>
// Include LCD display library for I2C
#include <LiquidCrystal.h>
// Include Keypad library
#include <Keypad.h>
// Length of password + 1 for null character
#define Password_Length 8
// Character to hold password input
char Data[Password_Length];
// Password
char Master[Password_Length] = "123A456";
// Pin connected to lock relay input
int lockOutput = 13;
// Counter for character entries
byte data_count = 0;
// Character to hold key input
char customKey;
// Constants for row and column sizes
const byte ROWS = 4;
const byte COLS = 4;
// Array to represent keys on keypad
char hexaKeys[ROWS][COLS] = {
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'}
};
// Connections to Arduino
byte rowPins[ROWS] = {28, 30, 32, 34};
byte colPins[COLS] = {36, 38, 40, 42};
// Create keypad object
Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
// Create LCD object
LiquidCrystal lcd(8, 9, 10, 11, 12, 13);
void setup() {
// Setup LCD with backlight and initialize
lcd.begin(16,2);
// Set lockOutput as an OUTPUT pin
pinMode(lockOutput, OUTPUT);
}
void loop() {
// Initialize LCD and print
lcd.setCursor(0, 0);
lcd.print("Enter Password:");
// Look for keypress
customKey = customKeypad.getKey();
if (customKey) {
// Enter keypress into array and increment counter
Data[data_count] = customKey;
lcd.setCursor(data_count,1);
lcd.print(Data[data_count]);
data_count++;
}
// See if we have reached the password length
if (data_count == Password_Length - 1) {
lcd.clear();
if (!strcmp(Data, Master)) {
// Password is correct
lcd.print("Correct");
// Turn on relay for 5 seconds
delay(5000);
digitalWrite(lockOutput, HIGH);
}
else {
// Password is incorrect
lcd.print("Incorrect");
delay(1000);
}
// Clear data and LCD display
lcd.clear();
clearData();
}
}
void clearData() {
// Go through array and clear data
while (data_count != 0) {
Data[data_count--] = 0;
}
return;
}
How to turn it ON for unlimited time... Please help