Introduction: Arduino, Monitoring Door-Opening Via Gmail

In this tutorial, I am going to show you how to detect the door-opening event and send a notification via Gmail using Arduino Uno.

If you are a beginner, you can learn about wifi and sensor in Arduino - WiFi and Arduino - Door Sensor tutorials.

Let's get started!

Detecting Door-Opening Event

Magnetic sensor I used includes two parts: sensor and magnet. When two parts are in proximity, the output pin of the sensor is HIGH, otherwise the output pin is LOW. Taking advantage of this feature, I installed one part of the sensor on the door leaf and the other on the door frame. By checking state of the output pin, we can detect when door is opened and then make an alert or send a notification.

Handling Event

When the door-opening event occurs, a notification is sent via Gmail.

Step 1: Things We Need

Step 2: Assembly

1. Stack PHPoC Shield on Arduino.

2. Connect LAN cable to the shield for Ethernet.

3. Pin wiring between Arduino and Sensor.

----5v--------red pin.

----A0-------black pin.

Step 3: Install This Set on the Door

1. Attach the sensor part, Arduino set (including PHPoC shield) to the door frame

2. Attach the magnet part on the door leaf.

3. Power Arduino

4. Connect to Internet via LAN cable or USB Wifi Dongle.

Step 4: Download and Install Library on Arduino

Install PHPoC and ezButton library

Step 5: Arduino Code

#include <Phpoc.h>
#include <ezButton.h>

PhpocEmail email;
ezButton button(A0); // create Button object that attach to pin A0;

void setup() {
Phpoc.begin(PF_LOG_SPI | PF_LOG_NET | PF_LOG_APP);
//Phpoc.beginIP6(); uncomment this line if you are going to use IPv6
button.setDebounceTime(100); // set debounce time to 100 milliseconds

void loop() {
button.loop(); // MUST call the loop() function first
if(button.isPressed()) { // if door is opened...
email.setOutgoingServer("", 587);
email.setOutgoingLogin("Google ID", "Google Password");

email.setFrom("Gmail address ", "Sender Name");
email.setTo("Receiver email address", "Receiver Name");

email.setSubject("Door is opened. [#905]"); // Mail Subject

// Mail Contents
email.println("Door is opened.");

if (email.send() > 0) // Send Email
Serial.println("Your Mail has been sent successfully");
Serial.println("Your Mail is not sent");
} else if (button.isReleased()) { // if door is closed...
// Write codes in the same way

Step 6: Function References