DIY - Digital Lock - with Processing

1#include <LiquidCrystal.h>
2
3LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
4
5const int in1 = 8;
6const int in2 = 9;
7
8String clave = "1234";
9String entrada = "";
10
11void setup() {
12  lcd.begin(16, 2);
13  pinMode(in1, OUTPUT);
14  pinMode(in2, OUTPUT);
15  lcd.print("Enter Password");
16  Serial.begin(9600);
17}
18
19void loop() {
20  while (Serial.available() > 0) {
21    char c = Serial.read();
22    if (c == '\n') {
23      validarEntrada();
24    } else {
25      entrada += c;
26    }
27  }
28}
29
30void validarEntrada() {
31  lcd.clear();
32  if(entrada == "CLOSE"){
33    lcd.setCursor(0, 0);
34    lcd.print("Closing...");
35    cerrarCerradura();
36  }else if (entrada.startsWith("SET:")) {
37    String nuevaClave = entrada.substring(4);
38    if (nuevaClave.length() >= 4 && nuevaClave.length() <= 8) {
39      clave = nuevaClave;
40      lcd.setCursor(0, 0);
41      lcd.print("Password");
42      lcd.setCursor(0, 1);
43      lcd.print("Updated");
44      delay(3000);
45      lcd.clear();
46      lcd.setCursor(0, 0);
47      lcd.print("Enter Password");
48    } else {
49      lcd.setCursor(0, 0);
50      lcd.print("Cannot Update");
51      lcd.setCursor(0, 1);
52      lcd.print("Password");
53      delay(3000);
54      lcd.clear();
55      lcd.setCursor(0, 0);
56      lcd.print("Enter Password");
57    }
58  } else if (entrada == clave) {
59    lcd.setCursor(0, 0);
60    lcd.print("Correct Password");
61    abrirCerradura();
62  } else {
63    lcd.setCursor(0, 0);
64    lcd.print("Wrong Password");
65    delay(3000);
66    lcd.clear();
67    lcd.setCursor(0, 0);
68    lcd.print("Enter Password");
69  }
70
71  entrada = "";
72}
73
74void abrirCerradura() {
75  digitalWrite(in1, HIGH);
76  digitalWrite(in2, LOW);
77  delay(1500);  
78  digitalWrite(in1, LOW);
79  digitalWrite(in2, LOW);
80  lcd.setCursor(0, 1);
81  lcd.print("Lock Opened");
82  delay(2000);
83  lcd.clear();
84  lcd.setCursor(0, 0);
85  lcd.print("Enter Password");
86}
87
88void cerrarCerradura() {
89  digitalWrite(in1, LOW);
90  digitalWrite(in2, HIGH);
91  delay(1500); 
92  digitalWrite(in1, LOW);
93  digitalWrite(in2, LOW);
94  lcd.setCursor(0, 1);
95  lcd.print("Lock Closed");
96  delay(2000);
97  lcd.clear();
98  lcd.setCursor(0, 0);
99  lcd.print("Enter Password");
100}

1import processing.serial.*;
2
3Serial myPort;
4
5String clave = "";          
6String nuevaClave = "";     
7boolean cambiandoClave = false;  
8
9void setup() {
10  size(300, 500);
11  printArray(Serial.list()); 
12  myPort = new Serial(this, Serial.list()[2], 9600); 
13}
14
15void draw() {
16  background(240);
17  textAlign(CENTER, CENTER);
18  textSize(24);
19  fill(0);
20  text(cambiandoClave ? "New password: " + nuevaClave : "Password: " + clave, width / 2, 50);
21
22 
23  for (int i = 1; i <= 9; i++) {
24    drawButton((i - 1) % 3, (i - 1) / 3 + 1, str(i));
25  }
26
27 
28  drawButton(1, 4, "0");
29
30  
31  fill(100, 200, 100);
32  rect(200, 300, 80, 50);
33  fill(255);
34  text("Send", 240, 325);
35
36  
37  fill(100, 100, 350);
38  rect(70, 365, 160, 50);
39  fill(255);
40  textSize(18);
41  text("Change password", 150, 390);
42  
43  
44  fill(255, 100, 100);
45  rect(80, 430, 140, 40);
46  fill(255);
47  textSize(18);
48  text("Close lock", 150, 450);
49
50}
51
52void drawButton(int col, int row, String label) {
53  int x = col * 100 + 10;
54  int y = row * 70 + 10;
55  fill(200);
56  rect(x, y, 80, 50);
57  fill(0);
58  textSize(20);
59  text(label, x + 40, y + 25);
60}
61
62void mousePressed() {
63  
64  for (int i = 1; i <= 9; i++) {
65    int col = (i - 1) % 3;
66    int row = (i - 1) / 3 + 1;
67    if (dentroDelBoton(col, row)) {
68      agregarDigito(str(i));
69    }
70  }
71
72  
73  if (dentroDelBoton(1, 4)) {
74    agregarDigito("0");
75  }
76
77  
78  if (mouseX > 200 && mouseX < 280 && mouseY > 300 && mouseY < 350) {
79    if (cambiandoClave && nuevaClave.length() > 0) {
80      myPort.write("SET:" + nuevaClave + "\n");
81      println("Sending new password: " + nuevaClave);
82      nuevaClave = "";
83      cambiandoClave = false;
84    } else if (clave.length() > 0) {
85      myPort.write(clave + "\n");
86      println("Sending password: " + clave);
87      clave = "";
88    }
89  }
90
91  
92  if (mouseX > 70 && mouseX < 230 && mouseY > 365 && mouseY < 415) {
93    cambiandoClave = true;
94    nuevaClave = "";
95  }
96  
97  
98  if (mouseX > 80 && mouseX < 220 && mouseY > 430 && mouseY < 470) {
99  myPort.write("CLOSE\n");
100  println("Sending command to close lock");
101  }
102
103}
104
105boolean dentroDelBoton(int col, int row) {
106  int x = col * 100 + 10;
107  int y = row * 70 + 10;
108  return (mouseX > x && mouseX < x + 80 && mouseY > y && mouseY < y + 50);
109}
110
111void agregarDigito(String digito) {
112  if (cambiandoClave) {
113    if (nuevaClave.length() < 8) nuevaClave += digito;
114  } else {
115    if (clave.length() < 8) clave += digito;
116  }
117}