Programmable Arduino Timer (Advanced Version)

1#include <Keypad.h>
2#include <LedControl.h>
3#include <SPI.h>
4
5const byte ROWS = 4; 
6const byte COLS = 4; 
7char keys[ROWS][COLS] = {
8  {'1', '2', '3', 'A'},
9  {'4', '5', '6', 'B'},
10  {'7', '8', '9', 'C'},
11  {'*', '0', '#', 'D'}
12};
13byte rowPins[ROWS] = {6, 7, 8, 9}; 
14byte colPins[COLS] = {2, 3, 4, 5}; 
15
16Keypad keypadObj = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
17LedControl lc = LedControl(10, 11, 12, 1);
18
19long csecondsLeft;
20int decrement = 3;
21bool explosed = false;
22bool defused = false;
23
24long hours = 0;
25long minutes = 0;
26long seconds = 0;
27long hundredths = 0;
28
29String code = "";
30
31char keypadOutput[32] = {0};
32byte playSound = A0;
33
34
35void setup() {
36
37  csecondsLeft = 0;
38  Serial.begin(19200);
39  lc.shutdown(0, false);
40  lc.setIntensity(0, 10);
41  lc.clearDisplay(0); 
42
43  tone(playSound, 3236, 150); delay(300);
44  tone(playSound, 3236, 150); delay(300);
45  tone(playSound, 3236, 150); delay(300);
46  
47  lc.setChar(0,7,'-',false); delay(100);
48  lc.setChar(0,6,'-',false); delay(100);
49  lc.setChar(0,5,'-',false); delay(100);
50  lc.setChar(0,4,'-',false); delay(100);
51  lc.setChar(0,3,'-',false); delay(100);
52  lc.setChar(0,2,'-',false); delay(100);
53  lc.setChar(0,1,'-',false); delay(100);
54  lc.setChar(0,0,'-',false); delay(100);
55
56  lc.clearDisplay(0);
57
58  pinMode(A1, OUTPUT);
59  pinMode(13, OUTPUT);
60  pinMode(A0, OUTPUT);
61  analogWrite(A0, 0);
62}
63
64bool isProgrammingTime = false;
65String inputKeys = ""; 
66String programmedTime = ""; 
67bool isCountingDown = false; 
68
69void updateDisplay() {
70
71  long remainingSeconds = csecondsLeft / 60;
72
73  hours = remainingSeconds / 3600;
74  remainingSeconds %= 3600;
75  minutes = remainingSeconds / 60;
76  seconds = remainingSeconds % 60;
77  hundredths = csecondsLeft % 60;
78
79  lc.setDigit(0, 7, hours / 10, false);
80  lc.setDigit(0, 6, hours % 10, false);
81  lc.setDigit(0, 5, minutes / 10, false); 
82  lc.setDigit(0, 4, minutes % 10, false);
83  lc.setDigit(0, 3, seconds / 10, false);
84  lc.setDigit(0, 2, seconds % 10, false);
85  lc.setDigit(0, 1, hundredths / 10, false);
86  lc.setDigit(0, 0, hundredths % 10, false);
87}
88
89void programTime() {
90
91  if (inputKeys.length() >= 8) {
92
93    inputKeys = inputKeys.substring(0, 8);
94
95    programmedTime = inputKeys.substring(0, 2) + ":" + inputKeys.substring(2, 4) + ":" + inputKeys.substring(4, 6) + ":" + inputKeys.substring(6, 8);
96
97    Serial.print("inputKeys: "); Serial.println(inputKeys);
98    Serial.print("programmedTime: "); Serial.println(programmedTime);
99
100    lc.clearDisplay(0);
101
102    inputKeys = "";
103  }
104}
105
106void startCountdown() {
107
108  Serial.println("Starting countdown...");
109
110  if (programmedTime.length() == 11) { 
111    hours = programmedTime.substring(0, 2).toInt();
112    minutes = programmedTime.substring(3, 5).toInt();
113    seconds = programmedTime.substring(6, 8).toInt();
114    hundredths = programmedTime.substring(9, 11).toInt();
115
116    csecondsLeft = ((hours * 3600) + (minutes * 60) + seconds) * 60 + hundredths;
117  } else {
118    Serial.println("Invalid programmed time. Please enter a time greater than zero.");
119    return;
120  }
121 
122  updateDisplay();
123  isCountingDown = true; 
124}
125
126
127void loop() {
128
129  char key = keypadObj.getKey();
130
131  if (key) {
132    Serial.print("Key Pressed: ");
133    Serial.println(key);
134
135    if (key >= '0' && key <= '9') {
136      int num = key - '0';
137      int displayIndex = 7 - inputKeys.length();
138      lc.setDigit(0, displayIndex, num, false);
139      inputKeys += key;
140      tone(playSound, 1000, 50);
141    }
142
143    if (!isProgrammingTime && key == 'A') { 
144
145      Serial.println("Programming time...");
146      isProgrammingTime = true;
147      inputKeys = ""; 
148      programmedTime = ""; 
149      lc.clearDisplay(0); 
150
151    } else if (isProgrammingTime && key == 'D') { 
152
153      isProgrammingTime = false;
154      programTime();
155      Serial.print("Programmed Time: ");
156      Serial.println(programmedTime);
157      startCountdown();
158      programmedTime = ""; 
159
160    } else if (isCountingDown && key == 'B') {
161
162      Serial.println(code);
163      decrement = 0;
164      defused = true;
165      code = "";    
166
167    } else if (isCountingDown && key == 'D') {
168
169      Serial.println(code);
170      decrement = 3;
171      defused = false;
172      code = ""; 
173
174    } else if (key == 'C') {
175
176      isProgrammingTime = false;
177      lc.setDigit(0, 7, 0, false);
178      lc.clearDisplay(0);
179
180    }
181 }
182
183
184  else if (isCountingDown) {
185
186      delay(60); 
187      csecondsLeft -= decrement;
188
189      if (csecondsLeft < 10) {
190        csecondsLeft = 0;
191        if (!explosed) {
192          tone(playSound, 1000, 50);
193          digitalWrite(13, HIGH);
194          digitalWrite(A1, HIGH);
195        }
196        explosed = true;
197      }
198      updateDisplay(); 
199      if (csecondsLeft % 60 == 0) {
200        tone(playSound, 3236, 50);
201    }
202    
203  }
204
205}