Tastiera - Relè

Attiva il relè se la password è corretta

#include <Keypad.h>

const int  RELAY_PIN =  2 // the Arduino pin, which connects to the IN pin of relay
const int ROW_NUM = 4; //four rows
const int COLUMN_NUM = 3; //three columns

char keys[ROW_NUM][COLUMN_NUM] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};


byte pin_rows[ROW_NUM] = {3, 4, 5, 6}; //connect to the row pinouts of the keypad
byte pin_column[COLUMN_NUM] = {8, 9, 10}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );

const String password_1 = "1234"; // change your password here
const String password_2 = "74123";  // change your password here
const String password_3 = "1598753";   // change your password here
String input_password;

void setup() {
  Serial.begin(9600);
  input_password.reserve(32); // maximum password size is 32, change if needed
  pinMode(RELAY_PIN, OUTPUT); // initialize pin as an output.
  digitalWrite(RELAY_PIN, LOW);
}

void loop() {
  char key = keypad.getKey();

  if (key) {
    Serial.println(key);

    if (key == '*') {
      input_password = ""; // reset the input password
    } else if (key == '#') {
      if (input_password == password_1 || input_password == password_2 || input_password == password_3) {
        Serial.println("The password is correct, turning ON relay");
        digitalWrite(RELAY_PIN, HIGH);
      } else {
        Serial.println("The password is incorrect, try again");
      }

      input_password = ""; // reset the input password
    } else {
      input_password += key; // append new character to input password string
    }
  }
}

Attiva un relè per un periodo di tempo se la password è corretta

#include <Keypad.h>
#include <ezOutput.h>

#define RELAY_ON_TIME 5000 // in milliseconds

const int  RELAY_PIN =  2 // the Arduino pin, which connects to the IN pin of relay
const int ROW_NUM = 4; //four rows
const int COLUMN_NUM = 3; //three columns

char keys[ROW_NUM][COLUMN_NUM] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};


byte pin_rows[ROW_NUM] = {3, 4, 5, 6}; //connect to the row pinouts of the keypad
byte pin_column[COLUMN_NUM] = {8, 9, 10}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );

const String password_1 = "1234"; // change your password here
const String password_2 = "74123";  // change your password here
const String password_3 = "1598753";   // change your password here
String input_password;

void setup() {
  Serial.begin(9600);
  input_password.reserve(32); // maximum password size is 32, change if needed
  relay.low();
}

void loop() {
  relay.loop(); // MUST call the loop() function first
  char key = keypad.getKey();

  if (key) {
    Serial.println(key);

    if (key == '*') {
      input_password = ""; // reset the input password
    } else if (key == '#') {
      if (input_password == password_1 || input_password == password_2 || input_password == password_3) {
        Serial.println("The password is correct, turning ON relay");
        relay.low(); // set low before making a high pulse
        relay.pulse(RELAY_ON_TIME); // turn on relay in RELAY_ON_TIME duration and then turn off
      } else {
        Serial.println("The password is incorrect, try again");
      }

      input_password = ""; // reset the input password
    } else {
      input_password += key; // append new character to input password string
    }
  }
}