Arduino Digital Locker (Prototype)

1//Edited by Jashoskam Bora
2//On 27/5/20
3
4#include <Keypad.h>
5#include  <Servo.h>
6
7const int ROW_NUM = 4; //four rows
8const int COLUMN_NUM = 4;  //three columns
9
10char keys[ROW_NUM][COLUMN_NUM] = {
11  {'1','2','3','A'},
12  {'4','5','6','B'},
13  {'7','8','9','C'},
14  {'*','0','#','D'}
15};
16
17int  Led=11;
18int Red=12;
19
20byte pin_rows[ROW_NUM] = {9, 8, 7, 6}; //connect to  the row pinouts of the keypad
21byte pin_column[COLUMN_NUM] = {5, 4, 3, 2}; //connect  to the column pinouts of the keypad
22
23Servo Lock;
24
25Keypad keypad = Keypad(  makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );
26
27const String  password = "1234"; // change your password here
28String input_password;
29
30void  setup(){
31  Serial.begin(9600);
32  input_password.reserve(32); // maximum input  characters is 33, change if needed
33  Lock.attach(10);
34  Lock.write(90);
35  pinMode(Led,OUTPUT);
36  pinMode(Red,OUTPUT);
37}
38
39void loop(){
40  char  key = keypad.getKey();
41
42  if (key){
43    Serial.println(key);
44    //input_password=key;
45    //input_password="123" + key;
46  
47    if(key == '*') {
48      input_password  = ""; 
49    }else if(key == '#') {
50            Serial.println("input_password  = " + input_password);
51            if(password == input_password) {
52              digitalWrite(Red,LOW);
53              Serial.println ("**************************");
54              Serial.println("password  is correct");   
55              Serial.println ("**************************");
56              Lock.write(0);
57              digitalWrite(Led,HIGH);
58
59            }  else {
60                  digitalWrite(Led,LOW);
61                  Serial.println("password  is incorrect, try again");
62                  input_password = ""; 
63                  Lock.write(90);
64                  digitalWrite(Red,HIGH);
65                  
66            }
67      }else
68        input_password= input_password + key;
69      }
70      
71  }