Keypad Garage Opener

Replaced a bad keypad on the outside of my garage door.

Dec 2, 2020

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6 respects

Components and supplies

5 mm LED: Red

5 mm LED: Green

Garage Door Fob

LED, Blue Green

Resistor 220 ohm

Tactile Switch, Top Actuated

Arduino Nano R3

SG90 Micro-servo motor

Resistor 10k ohm

5 mm LED: Yellow

Tools and machines

3D Printer (generic)

Soldering iron (generic)

Apps and platforms

Arduino IDE

Project description

Code

Garage Door Keypad

arduino

See instructions in code

1//  Garage Door Opener using servo to press remote button
2//
3//   Correct entry of 4 digit code will illuminate the Green LED
4//  Incorrect entry   of 4 digit code will illuminate the Red LED
5//
6//  To change the code:
7//   Press the "#" button on keypad and the Blue LED will illimunate
8//  While   Blue LED is illuminated, enter the initial password
9//    Correct entry will   illuminate the Blue and Yellow LEDs
10//    Incorrect entry will illuminate the   Red LED (must start over and press "#" on keypad)
11//  While the Blue and Yellow   LEDs are illuminated, enter the new password.
12//    Successful change of password   will illuminate the Green LED.
13//
14//  To reset the password to 1234, press   the reset button
15
16#include<Keypad.h>
17#include<EEPROM.h>
18#include<Servo.h>
19
20   Servo ServoMotor;
21
22  char password[4];
23  char initial_password[4],new_password[4];
24   int i=0;
25  int LED_G = 14;
26  int LED_R = 15;
27  int LED_B = 16;
28  int   LED_Y = 17;
29  char key_pressed=0;
30
31  const int Reset = 12;
32  int value1   = HIGH;
33
34  const byte rows = 4; 
35  const byte columns = 3; 
36  char keys[rows][columns]   = {
37  {'1','2','3'},
38  {'4','5','6'},
39  {'7','8','9'},
40  {'*','0','#'}
41   };
42
43  byte row_pins[rows] = { 7, 2, 3, 5};
44  byte column_pins[columns]   = { 6, 8, 4};   
45  Keypad keypad_key = Keypad( makeKeymap(keys), row_pins, column_pins,   rows, columns);
46
47  //#define LED_R 10 // define red LED
48  //#define LED_G   11 // define green LED
49
50void setup()
51  {
52  Serial.begin (9600);
53   pinMode(Reset, INPUT);
54  pinMode(LED_R, OUTPUT);
55  pinMode(LED_G, OUTPUT);
56   pinMode(LED_B, OUTPUT);
57  pinMode(LED_Y, OUTPUT);
58  delay(1000);
59  ServoMotor.attach(13);
60
61   // check if the password has been changed
62  if (EEPROM.read(256) != 123) {   // not equal to 123
63    EEPROM.write(256, 123); // write value of 123 to byte   256
64    initialpassword(); // set first password to 1234
65  }
66    else {   // if byte 256 is equal to 123
67      EEPROM.get (0, password); // get last password   before power failure
68    }
69  }
70
71void loop()
72{
73  digitalWrite(LED_R,   LOW);
74  digitalWrite(LED_G, LOW);
75  key_pressed = keypad_key.getKey();
76
77   value1 = digitalRead (Reset);
78  if (value1 == HIGH)
79    initialpassword();
80   
81  if(key_pressed=='#')
82    change();
83
84  if (key_pressed)
85  {
86
87     password[i++]=key_pressed;
88    Serial.println(key_pressed);
89      }
90
91   if(i==4)
92  {
93    delay(200);
94    for(int j=0;j<4;j++)
95      initial_password[j]=EEPROM.read(j);
96     if(!(strncmp(password, initial_password,4)))
97    {
98
99      Serial.println("Password   Accepted");
100      digitalWrite(LED_G, HIGH);
101      ServoMotor.write(78);
102       delay(delay);
103      ServoMotor.write(90);
104      Serial.println("Press   # to change");
105      delay(delay);
106      Serial.println("Enter Password:");
107       i=0;
108
109    }
110
111    else
112    {
113      digitalWrite(LED_R, HIGH);
114       Serial.println("Wrong Password");;
115      Serial.println("Press # to   change");
116      delay(delay);
117      Serial.println("Enter Password");
118
119       i=0;
120    }
121  }
122}
123
124void change()
125
126{
127  int j=0;
128   Serial.println("Current Password");
129  digitalWrite(LED_B, HIGH);
130  while(j<4)
131   {
132    char key=keypad_key.getKey();
133    if(key)
134    {
135      new_password[j++]=key;
136       Serial.println(key);
137    }
138    key=0;
139  }
140  delay(delay);
141   if((strncmp(new_password, initial_password, 4)))
142  {
143    Serial.println("Wrong   Password");
144    Serial.println("Try Again");
145    delay(200);
146    digitalWrite(LED_B,   LOW);
147    digitalWrite(LED_R, HIGH);
148    delay(delay);
149    digitalWrite(LED_R,   LOW);
150  }
151  else
152  {
153    j=0;
154    Serial.println("New Password:");
155     digitalWrite(LED_Y, HIGH);
156    while(j<4)
157    {
158      char key=keypad_key.getKey();
159       if(key)
160      {
161        initial_password[j]=key;
162        Serial.println(key);
163         EEPROM.write(j,key);
164        j++;
165      }
166    }
167    Serial.println("Password   Changed");
168    delay(200);
169    digitalWrite(LED_B, LOW);
170    digitalWrite(LED_Y,   LOW);
171    digitalWrite(LED_G, HIGH);
172    delay(delay);
173    digitalWrite(LED_G,   LOW);
174  }
175  Serial.println("Enter Password");
176  key_pressed=0;
177}
178
179void   initialpassword(){
180  for(int j=0;j<4;j++)
181    EEPROM.write(j, j+49);
182  for(int   j=0;j<4;j++)
183    initial_password[j]=EEPROM.read(j);
184}

//  Garage Door Opener using servo to press remote button
//
//   Correct entry of 4 digit code will illuminate the Green LED
//  Incorrect entry   of 4 digit code will illuminate the Red LED
//
//  To change the code:
//   Press the "#" button on keypad and the Blue LED will illimunate
//  While   Blue LED is illuminated, enter the initial password
//    Correct entry will   illuminate the Blue and Yellow LEDs
//    Incorrect entry will illuminate the   Red LED (must start over and press "#" on keypad)
//  While the Blue and Yellow   LEDs are illuminated, enter the new password.
//    Successful change of password   will illuminate the Green LED.
//
//  To reset the password to 1234, press   the reset button

#include<Keypad.h>
#include<EEPROM.h>
#include<Servo.h>

   Servo ServoMotor;

  char password[4];
  char initial_password[4],new_password[4];
   int i=0;
  int LED_G = 14;
  int LED_R = 15;
  int LED_B = 16;
  int   LED_Y = 17;
  char key_pressed=0;

  const int Reset = 12;
  int value1   = HIGH;

  const byte rows = 4; 
  const byte columns = 3; 
  char keys[rows][columns]   = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
   };

  byte row_pins[rows] = { 7, 2, 3, 5};
  byte column_pins[columns]   = { 6, 8, 4};   
  Keypad keypad_key = Keypad( makeKeymap(keys), row_pins, column_pins,   rows, columns);

  //#define LED_R 10 // define red LED
  //#define LED_G   11 // define green LED

void setup()
  {
  Serial.begin (9600);
   pinMode(Reset, INPUT);
  pinMode(LED_R, OUTPUT);
  pinMode(LED_G, OUTPUT);
   pinMode(LED_B, OUTPUT);
  pinMode(LED_Y, OUTPUT);
  delay(1000);
  ServoMotor.attach(13);

   // check if the password has been changed
  if (EEPROM.read(256) != 123) {   // not equal to 123
    EEPROM.write(256, 123); // write value of 123 to byte   256
    initialpassword(); // set first password to 1234
  }
    else {   // if byte 256 is equal to 123
      EEPROM.get (0, password); // get last password   before power failure
    }
  }

void loop()
{
  digitalWrite(LED_R,   LOW);
  digitalWrite(LED_G, LOW);
  key_pressed = keypad_key.getKey();

   value1 = digitalRead (Reset);
  if (value1 == HIGH)
    initialpassword();
   
  if(key_pressed=='#')
    change();

  if (key_pressed)
  {

     password[i++]=key_pressed;
    Serial.println(key_pressed);
      }

   if(i==4)
  {
    delay(200);
    for(int j=0;j<4;j++)
      initial_password[j]=EEPROM.read(j);
     if(!(strncmp(password, initial_password,4)))
    {

      Serial.println("Password   Accepted");
      digitalWrite(LED_G, HIGH);
      ServoMotor.write(78);
       delay(delay);
      ServoMotor.write(90);
      Serial.println("Press   # to change");
      delay(delay);
      Serial.println("Enter Password:");
       i=0;

    }

    else
    {
      digitalWrite(LED_R, HIGH);
       Serial.println("Wrong Password");;
      Serial.println("Press # to   change");
      delay(delay);
      Serial.println("Enter Password");

       i=0;
    }
  }
}

void change()

{
  int j=0;
   Serial.println("Current Password");
  digitalWrite(LED_B, HIGH);
  while(j<4)
   {
    char key=keypad_key.getKey();
    if(key)
    {
      new_password[j++]=key;
       Serial.println(key);
    }
    key=0;
  }
  delay(delay);
   if((strncmp(new_password, initial_password, 4)))
  {
    Serial.println("Wrong   Password");
    Serial.println("Try Again");
    delay(200);
    digitalWrite(LED_B,   LOW);
    digitalWrite(LED_R, HIGH);
    delay(delay);
    digitalWrite(LED_R,   LOW);
  }
  else
  {
    j=0;
    Serial.println("New Password:");
     digitalWrite(LED_Y, HIGH);
    while(j<4)
    {
      char key=keypad_key.getKey();
       if(key)
      {
        initial_password[j]=key;
        Serial.println(key);
         EEPROM.write(j,key);
        j++;
      }
    }
    Serial.println("Password   Changed");
    delay(200);
    digitalWrite(LED_B, LOW);
    digitalWrite(LED_Y,   LOW);
    digitalWrite(LED_G, HIGH);
    delay(delay);
    digitalWrite(LED_G,   LOW);
  }
  Serial.println("Enter Password");
  key_pressed=0;
}

void   initialpassword(){
  for(int j=0;j<4;j++)
    EEPROM.write(j, j+49);
  for(int   j=0;j<4;j++)
    initial_password[j]=EEPROM.read(j);
}

Garage Door Keypad

arduino

See instructions in code

1//  Garage Door Opener using servo to press remote button
2//
3//  Correct entry of 4 digit code will illuminate the Green LED
4//  Incorrect entry  of 4 digit code will illuminate the Red LED
5//
6//  To change the code:
7//  Press the "#" button on keypad and the Blue LED will illimunate
8//  While  Blue LED is illuminated, enter the initial password
9//    Correct entry will  illuminate the Blue and Yellow LEDs
10//    Incorrect entry will illuminate the  Red LED (must start over and press "#" on keypad)
11//  While the Blue and Yellow  LEDs are illuminated, enter the new password.
12//    Successful change of password  will illuminate the Green LED.
13//
14//  To reset the password to 1234, press  the reset button
15
16#include<Keypad.h>
17#include<EEPROM.h>
18#include<Servo.h>
19
20  Servo ServoMotor;
21
22  char password[4];
23  char initial_password[4],new_password[4];
24  int i=0;
25  int LED_G = 14;
26  int LED_R = 15;
27  int LED_B = 16;
28  int  LED_Y = 17;
29  char key_pressed=0;
30
31  const int Reset = 12;
32  int value1  = HIGH;
33
34  const byte rows = 4; 
35  const byte columns = 3; 
36  char keys[rows][columns]  = {
37  {'1','2','3'},
38  {'4','5','6'},
39  {'7','8','9'},
40  {'*','0','#'}
41  };
42
43  byte row_pins[rows] = { 7, 2, 3, 5};
44  byte column_pins[columns]  = { 6, 8, 4};   
45  Keypad keypad_key = Keypad( makeKeymap(keys), row_pins, column_pins,  rows, columns);
46
47  //#define LED_R 10 // define red LED
48  //#define LED_G  11 // define green LED
49
50void setup()
51  {
52  Serial.begin (9600);
53  pinMode(Reset, INPUT);
54  pinMode(LED_R, OUTPUT);
55  pinMode(LED_G, OUTPUT);
56  pinMode(LED_B, OUTPUT);
57  pinMode(LED_Y, OUTPUT);
58  delay(1000);
59  ServoMotor.attach(13);
60
61  // check if the password has been changed
62  if (EEPROM.read(256) != 123) {  // not equal to 123
63    EEPROM.write(256, 123); // write value of 123 to byte  256
64    initialpassword(); // set first password to 1234
65  }
66    else {  // if byte 256 is equal to 123
67      EEPROM.get (0, password); // get last password  before power failure
68    }
69  }
70
71void loop()
72{
73  digitalWrite(LED_R,  LOW);
74  digitalWrite(LED_G, LOW);
75  key_pressed = keypad_key.getKey();
76
77  value1 = digitalRead (Reset);
78  if (value1 == HIGH)
79    initialpassword();
80  
81  if(key_pressed=='#')
82    change();
83
84  if (key_pressed)
85  {
86
87    password[i++]=key_pressed;
88    Serial.println(key_pressed);
89      }
90
91  if(i==4)
92  {
93    delay(200);
94    for(int j=0;j<4;j++)
95      initial_password[j]=EEPROM.read(j);
96    if(!(strncmp(password, initial_password,4)))
97    {
98
99      Serial.println("Password  Accepted");
100      digitalWrite(LED_G, HIGH);
101      ServoMotor.write(78);
102      delay(delay);
103      ServoMotor.write(90);
104      Serial.println("Press  # to change");
105      delay(delay);
106      Serial.println("Enter Password:");
107      i=0;
108
109    }
110
111    else
112    {
113      digitalWrite(LED_R, HIGH);
114      Serial.println("Wrong Password");;
115      Serial.println("Press # to  change");
116      delay(delay);
117      Serial.println("Enter Password");
118
119      i=0;
120    }
121  }
122}
123
124void change()
125
126{
127  int j=0;
128  Serial.println("Current Password");
129  digitalWrite(LED_B, HIGH);
130  while(j<4)
131  {
132    char key=keypad_key.getKey();
133    if(key)
134    {
135      new_password[j++]=key;
136      Serial.println(key);
137    }
138    key=0;
139  }
140  delay(delay);
141  if((strncmp(new_password, initial_password, 4)))
142  {
143    Serial.println("Wrong  Password");
144    Serial.println("Try Again");
145    delay(200);
146    digitalWrite(LED_B,  LOW);
147    digitalWrite(LED_R, HIGH);
148    delay(delay);
149    digitalWrite(LED_R,  LOW);
150  }
151  else
152  {
153    j=0;
154    Serial.println("New Password:");
155    digitalWrite(LED_Y, HIGH);
156    while(j<4)
157    {
158      char key=keypad_key.getKey();
159      if(key)
160      {
161        initial_password[j]=key;
162        Serial.println(key);
163        EEPROM.write(j,key);
164        j++;
165      }
166    }
167    Serial.println("Password  Changed");
168    delay(200);
169    digitalWrite(LED_B, LOW);
170    digitalWrite(LED_Y,  LOW);
171    digitalWrite(LED_G, HIGH);
172    delay(delay);
173    digitalWrite(LED_G,  LOW);
174  }
175  Serial.println("Enter Password");
176  key_pressed=0;
177}
178
179void  initialpassword(){
180  for(int j=0;j<4;j++)
181    EEPROM.write(j, j+49);
182  for(int  j=0;j<4;j++)
183    initial_password[j]=EEPROM.read(j);
184}

//  Garage Door Opener using servo to press remote button
//
//  Correct entry of 4 digit code will illuminate the Green LED
//  Incorrect entry  of 4 digit code will illuminate the Red LED
//
//  To change the code:
//  Press the "#" button on keypad and the Blue LED will illimunate
//  While  Blue LED is illuminated, enter the initial password
//    Correct entry will  illuminate the Blue and Yellow LEDs
//    Incorrect entry will illuminate the  Red LED (must start over and press "#" on keypad)
//  While the Blue and Yellow  LEDs are illuminated, enter the new password.
//    Successful change of password  will illuminate the Green LED.
//
//  To reset the password to 1234, press  the reset button

#include<Keypad.h>
#include<EEPROM.h>
#include<Servo.h>

  Servo ServoMotor;

  char password[4];
  char initial_password[4],new_password[4];
  int i=0;
  int LED_G = 14;
  int LED_R = 15;
  int LED_B = 16;
  int  LED_Y = 17;
  char key_pressed=0;

  const int Reset = 12;
  int value1  = HIGH;

  const byte rows = 4; 
  const byte columns = 3; 
  char keys[rows][columns]  = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
  };

  byte row_pins[rows] = { 7, 2, 3, 5};
  byte column_pins[columns]  = { 6, 8, 4};   
  Keypad keypad_key = Keypad( makeKeymap(keys), row_pins, column_pins,  rows, columns);

  //#define LED_R 10 // define red LED
  //#define LED_G  11 // define green LED

void setup()
  {
  Serial.begin (9600);
  pinMode(Reset, INPUT);
  pinMode(LED_R, OUTPUT);
  pinMode(LED_G, OUTPUT);
  pinMode(LED_B, OUTPUT);
  pinMode(LED_Y, OUTPUT);
  delay(1000);
  ServoMotor.attach(13);

  // check if the password has been changed
  if (EEPROM.read(256) != 123) {  // not equal to 123
    EEPROM.write(256, 123); // write value of 123 to byte  256
    initialpassword(); // set first password to 1234
  }
    else {  // if byte 256 is equal to 123
      EEPROM.get (0, password); // get last password  before power failure
    }
  }

void loop()
{
  digitalWrite(LED_R,  LOW);
  digitalWrite(LED_G, LOW);
  key_pressed = keypad_key.getKey();

  value1 = digitalRead (Reset);
  if (value1 == HIGH)
    initialpassword();
  
  if(key_pressed=='#')
    change();

  if (key_pressed)
  {

    password[i++]=key_pressed;
    Serial.println(key_pressed);
      }

  if(i==4)
  {
    delay(200);
    for(int j=0;j<4;j++)
      initial_password[j]=EEPROM.read(j);
    if(!(strncmp(password, initial_password,4)))
    {

      Serial.println("Password  Accepted");
      digitalWrite(LED_G, HIGH);
      ServoMotor.write(78);
      delay(delay);
      ServoMotor.write(90);
      Serial.println("Press  # to change");
      delay(delay);
      Serial.println("Enter Password:");
      i=0;

    }

    else
    {
      digitalWrite(LED_R, HIGH);
      Serial.println("Wrong Password");;
      Serial.println("Press # to  change");
      delay(delay);
      Serial.println("Enter Password");

      i=0;
    }
  }
}

void change()

{
  int j=0;
  Serial.println("Current Password");
  digitalWrite(LED_B, HIGH);
  while(j<4)
  {
    char key=keypad_key.getKey();
    if(key)
    {
      new_password[j++]=key;
      Serial.println(key);
    }
    key=0;
  }
  delay(delay);
  if((strncmp(new_password, initial_password, 4)))
  {
    Serial.println("Wrong  Password");
    Serial.println("Try Again");
    delay(200);
    digitalWrite(LED_B,  LOW);
    digitalWrite(LED_R, HIGH);
    delay(delay);
    digitalWrite(LED_R,  LOW);
  }
  else
  {
    j=0;
    Serial.println("New Password:");
    digitalWrite(LED_Y, HIGH);
    while(j<4)
    {
      char key=keypad_key.getKey();
      if(key)
      {
        initial_password[j]=key;
        Serial.println(key);
        EEPROM.write(j,key);
        j++;
      }
    }
    Serial.println("Password  Changed");
    delay(200);
    digitalWrite(LED_B, LOW);
    digitalWrite(LED_Y,  LOW);
    digitalWrite(LED_G, HIGH);
    delay(delay);
    digitalWrite(LED_G,  LOW);
  }
  Serial.println("Enter Password");
  key_pressed=0;
}

void  initialpassword(){
  for(int j=0;j<4;j++)
    EEPROM.write(j, j+49);
  for(int  j=0;j<4;j++)
    initial_password[j]=EEPROM.read(j);
}

Downloadable files

Schematic

Documentation

Servo_fob_arduino_mount

This positions the servo to press the button on the fob. Wayne Dalton fob. Custom needed for other brands

Servo_fob_arduino_mount

This positions the servo to press the button on the fob. Wayne Dalton fob. Custom needed for other brands

Servo_fob_arduino_mount

Keypad case

Allows the keypad to be mounted to wall and adds the LEDs. Uses Adafruit Keypad 3845.

Keypad case

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