Keypad and oled display safe circiut

1#include <Wire.h>
2#include <Servo.h>
3#include <Keypad.h>
4#include  <U8x8lib.h>
5
6#define Password_Length 7
7
8U8X8_SSD1306_128X64_NONAME_HW_I2C  oleg;
9int signalPin = 12;
10
11char Data[Password_Length];
12char Master[Password_Length]  = "160306";
13byte data_count = 0, master_count = 0;
14bool Pass_is_good;
15char  customKey;
16float voltage1 = 5;
17const byte ROWS = 4;
18const byte COLS = 3;
19int  pos = 0;
20const int a = 1;
21const int b = 0;
22const int ledPin = 10;
23const  int closePin =11;
24//const int shutSwitch = A1;
25char hexaKeys[ROWS][COLS] =  {
26  {'1', '2', '3'},
27  {'4', '5', '6'},
28  {'7', '8', '9'},
29  {'*', '0',  '#'}
30};
31
32byte rowPins[ROWS] = {2, 3, 4, 5};
33byte colPins[COLS] = {6,  7, 8};
34
35Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins,  ROWS, COLS);
36Servo lock;
37Servo unlock;
38void setup() {
39  Serial.begin(9600);
40  oleg.begin();
41  oleg.setFont(u8x8_font_profont29_2x3_r);
42  pinMode(ledPin,  OUTPUT);
43  pinMode(closePin, OUTPUT);
44//  pinMode(shutSwitch, INPUT);
45  Wire.begin();
46  lock.attach(13);
47  unlock.attach(9);
48//  lock.write(100);
49  digitalWrite(closePin, HIGH);
50}
51
52void clearData() {
53  while (data_count  != 0) {
54    Data[data_count--] = 0;
55  }
56  return;
57}
58
59void ledFlash()  {
60  digitalWrite(ledPin, LOW);
61  delay(250);
62  digitalWrite(ledPin, HIGH);
63  delay(250);
64  digitalWrite(ledPin, LOW);
65  delay(250);
66  digitalWrite(ledPin,  HIGH);
67  delay(250);
68  digitalWrite(ledPin, LOW);
69  delay(250);
70  digitalWrite(ledPin,  HIGH);
71  delay(250);
72}
73void closeFlash() {
74  digitalWrite(closePin,  HIGH);
75  delay(250);
76  digitalWrite(closePin, LOW);
77  delay(250);
78  digitalWrite(closePin,  HIGH);
79  delay(250);
80  digitalWrite(closePin, LOW);
81  delay(250);
82  digitalWrite(closePin,  HIGH);
83  delay(250);
84  digitalWrite(closePin, LOW);
85  delay(250);
86  digitalWrite(closePin,  HIGH);
87  delay(250);
88  digitalWrite(closePin, LOW);
89  delay(250);
90  digitalWrite(closePin,  HIGH);
91  delay(250);
92}
93void loop() {
94  static byte theState = 1;
95  
96
97  oleg.setCursor(5, 0);
98  oleg.print("Enter");
99  oleg.setCursor(0,  3);
100  oleg.print("password");
101  oleg.setCursor(0, 0);
102  lock.write(100);
103
104  customKey = customKeypad.getKey();
105  if (customKey) {
106    oleg.print("        ");
107    oleg.setCursor(0, 3);
108    oleg.print("         ");
109    Data[data_count] = customKey;
110    oleg.setCursor(data_count, 1);
111    oleg.print(Data[data_count]);
112    data_count++;
113    delay(500);
114  }
115
116  if (data_count == Password_Length  - 1) {
117    oleg.print("        ");
118    oleg.setCursor(0, 3);
119    oleg.print("        ");
120    oleg.setCursor(0, 0);
121    if (!strcmp(Data, Master)) {
122      oleg.print("Correct");
123      digitalWrite(ledPin, HIGH);
124      digitalWrite(closePin,  LOW);
125      lock.write(0);
126      delay(30000);
127      oleg.setCursor(0,  0);
128      oleg.print("        ");
129      oleg.setCursor(0, 3);
130      oleg.print("         ");
131      oleg.setCursor(0, 0);
132      oleg.print("closing");      
133      ledFlash();
134      digitalWrite(ledPin, LOW);
135      closeFlash();
136      digitalWrite(closePin, HIGH);
137      lock.write(100);
138      oleg.setCursor(0,  0);
139      oleg.print("        ");
140      oleg.setCursor(0, 3);
141      oleg.print("         ");
142    } else {
143      oleg.print("Incorrect");
144      delay(1000);
145      oleg.setCursor(0, 0);
146      oleg.print("        ");
147      oleg.setCursor(0,  3);
148      oleg.print("         ");
149      lock.write(100);
150    }
151
152
153    clearData();
154  }
155}
156