Code for keypad/relay/pushbutton
Posted: Sun Feb 27, 2022 6:50 am
I am trying to get together code for my ESP32 WROOM to control door opening via a relay and keypad. I have made this work but I want a push button on the inside of the door that opens the door, this button should be toggeling the relay. I also want to be able to use at least 2 different codes, only works with 1 today. I have tried but my knowledge is not enough for this, am a beginner in this world. Anyone that can help me? 
Code: Select all
#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#define RELAY_PIN 26
const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};
byte rowPins[ROWS] = {27, 14, 12, 13}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {4, 5, 15}; //connect to the column pinouts of the keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows
String password = "1111";
String mypassword;
int redled = 17;
int lock = 16;
int counter = 0;
int attempts = 0;
int max_attempts = 3;
void setup(){
Serial.begin(9600);
// set up the LCD's number of columns and rows:
lcd.init(); // initialize the lcd
lcd.backlight();
//lcd.noBacklight();
pinMode(RELAY_PIN, OUTPUT);
digitalWrite(RELAY_PIN, HIGH); // lock the door
pinMode(redled, OUTPUT);
pinMode(lock, OUTPUT);
digitalWrite(redled, LOW);
digitalWrite(lock, LOW);
Serial.println(" PINKOD + * ");
lcd.print(" PINKOD + * ");
}
void loop()
{
keypadfunction();
}
void keypadfunction()
{
char key = keypad.getKey();
if (key){
Serial.println(key);
counter = counter + 1;
lcd.setCursor(counter, 1);
lcd.print("*");
}
if (key == '1')
{
mypassword = mypassword + 1;
}
if (key == '2')
{
mypassword = mypassword + 2;
}
if (key == '3')
{
mypassword = mypassword + 3;
}
if (key == '4')
{
mypassword = mypassword + 4;
}
if (key == '5')
{
mypassword = mypassword + 5;
}
if (key == '6')
{
mypassword = mypassword + 6;
}
if (key == '7')
{
mypassword = mypassword + 7;
}
if (key == '8')
{
mypassword = mypassword + 8;
}
if (key == '9')
{
mypassword = mypassword + 9;
}
if (key == '0')
{
mypassword = mypassword + 0;
}
if (key == '*')
{
Serial.println(mypassword);
if ( password == mypassword )
{
lcd.clear();
lcd.println("- Stig - In -");
lcd.setCursor(0,1);
lcd.println("");
digitalWrite(RELAY_PIN, LOW);
mypassword = "";
counter = 0;
lcd.clear();
lcd.setCursor(0,0);
lcd.println(" PINKOD + * ");
}
else
{
Serial.println("FEL PINKOD");
digitalWrite(lock, LOW);
attempts = attempts + 1;
if (attempts >= max_attempts )
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("5 min Lockout");
digitalWrite(redled, HIGH);
delay(5000);
digitalWrite(redled, LOW);
attempts = 0;
}
mypassword = "";
counter = 0;
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Fel Pinkod");
delay(1000);
lcd.setCursor(0,1);
lcd.print("Max ggr 3");
delay(1000);
lcd.clear();
lcd.println(" PINKOD + * ");
lcd.setCursor(0,1);
}
}
}