Published March 14, 2016 © GPL3+

Smart Doorbell

Never miss anyone at your door! A system that notifies your phone and email whenever someone presses the doorbell.

BeginnerShowcase (no instructions)1 hour90,507

Things used in this project

Hardware components

Arduino UNO

Jumper wires (generic)

Push button

Ethernet shield

Software apps and online services

Arduino IDE

Blynk

Story

I always wanted to make a system that would alert me on my phone and mail whenever someone is on the door. We often miss the doorbell of some reason or another.

Using this system you will never miss anyone who knocks on your door.

Using an Arduino and an ethernet shield to connect the button to the internet, the system uses blynk app to connect it to the cloud. The app is available both for android and IOS. The system sends an email and a mobile notification whenever it is pressed.

Project on Blynk

Push button to be used as doorbell

Notification from the doorbell as soon as it is pressed

Happy Hacking :)

Code

Doorbell.ino

#define BLYNK_PRINT Serial
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <SimpleTimer.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "YourAuthToken";

SimpleTimer timer;

WidgetLCD lcd(V1);

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth);

  while (Blynk.connect() == false) {
    // Wait until connected
  }
}
void notifyOnButtonPress()
{
  // Invert state, since button is "Active LOW"
  int isButtonPressed = !digitalRead(2);
  if (isButtonPressed) {
    BLYNK_LOG("Button is pressed.");

    Blynk.notify("Please open up! Somebody is on the door!");
     lcd.clear(); //Use it to clear the LCD Widget
  lcd.print(4, 0, "Open"); // use: (position X: 0-15, position Y: 0-1, "Message you want to print")
  lcd.print(4, 1, "The Door!");
  }
}

void emailOnButtonPress()
{

  int isButtonPressed = !digitalRead(2); // Invert state, since button is "Active LOW"

  if (isButtonPressed) // You can write any condition to trigger e-mail sending
  {
    BLYNK_LOG("Button is pressed."); // This can be seen in the Serial Monitor
    Blynk.email("kaustubhagarwal18@gmail.com", "Subject: Doorbell", "Please open up! Somebody is on the door!");
     lcd.clear(); //Use it to clear the LCD Widget
  lcd.print(4, 0, "Open"); // use: (position X: 0-15, position Y: 0-1, "Message you want to print")
  lcd.print(4, 1, "The Door!");

  }
}

void loop() {
  // put your main code here, to run repeatedly:
  Blynk.run();
  timer.run();
}