LMK

Let me Know: A Security-Alarming device using ESP32

A simple security system that notifies the user if his safe/drawer/door is opened. The project is built primarily using ESP32 microprocessor and Magnetic Reed Switch.

Files integration Explanation:

Apart from committing changes and integrating different components in the same file, I maintained those different modules of the project into different files. So that while debugging, I can check functionality of each module separately.

Testing

• The code in testing file was used to check the working of esp32, to light up and LED and confirm the pinout of my device.

WiFi

• The file "WiFi" is used to simply connect the ESP32 to WiFi connection when it boots up. The code here contains a placeholder to enter your network SSID and password so it has to be replaced with your own before testing.

Email

• This code now integrates the previous file, i.e WiFI connection as well, and its functionality is to send an email when ESP32 boots up. The content of email is a short html content.

door open alert

• This is the main code file that contains all the modules combined. FIrstly I just included the code that would check if my reed switch is functioning properly or not. I used onboard LED to check that i.e. it turns on or off when the switch opens or closes. Then in the same file, I integrated code for WiFi connection and sending email. For email I have created an SMTP session and included ESp Mail client library. It requires you to define the email sender, app password, receiver's email, and subject. As for the content of the email, I sent html designed message to the receiver.

Reed Switch

The switch that I used is a magnetic reed switch. This switch comes in two types, normally opened and normally closed ones. The one I used is a normally closed one i.e. when the magnetics are close togother (or the door is closed) then the circuit is closed and opening the door opens the circuit and as a result signal is sent to the esp32.

- Note:
+ In order for this to work, you need to replace with your own credentials.
Add your own network SSID and password. And for email, add a sender email and the password
is not the actual email password, it is the one that is generated upon 2-step verification.
Then finally, also replace the receiver'e email address to your own.
Moreover, change gpio pin for reed switch according to how you connected the switch.

Future Scope for Improvement:

Adding LED's that blink upon triggers, and adding a buzzer alarm that sounds when someone opens the switch. I would like to add the functionality that the pictyre of the intruder is captured as well and is sent along with the email as an attachment. For that, an esp32CAM would be required.