Shrek Alarm

The safest security system ever created. When intruders will make any movement inside your house, Shrek will be ready to welcome them!

Youtube Videp

The project is made of three parts:

• Raspberry Pi (I used the model 3 B+) with a PIR sensor
• A Windows machine
• Blynk app and its python libraries

Setup

Raspberry Pi

• PIR sensor and an LED to test that it works (I put some blue tag around the sensor so its field wouldn't be too wide and it's pointing directly at my bedroom door)
• Python 3.8.0 with RPiGPIO and Blynk packages
• Also needs the socket python library to connect to the Windows laptop and send an intruder signal

Windows Laptop and Lights

I am using a LIFX Mini Color bulb screwed to a cheak Kmart lamp. It is connected to the same wifi as the laptop I am using the socket and lifxlan packages on Python 3.8.5. The gabry_tag is just meant to indicate the presence of a BLE tag in the room to avoid triggering the system. Will be implemented in the future

Blynk App

The Blynk app setup is simple

• A Notification manages
• A switch button on the virtual pin V0
• An LED on the virtual pin V1 Don't forget to update the auth token on the Raspberry Pi script

How it works

It's fairly simple although the code ended up being messy and complicated for no apparent reason:

1. The windows laptop runs the server-like script Windows_ShrekAlarm.py waiting for connections to the RPi
2. The Rasbperry Pi runs the script RaspberryPi_ShrekAlarm.py, it connects via socket to the Windows laptop and to the Blynk app
3. The Blynk app can enable or disable the system through a switch button and it also has a virtual LED that acts the same as the physical one on the breadboard
4. When the system is enabled throug the Blynk App and the PIR sensor senses any movement the RPi will send a 1 to the Windows laptop through the opened TCP socket
5. The Windows laptop wiill then:
   • Turn on the lights
   • Change the lights color to green
   • Start the video of Shrek yelling
   • Start All star - Smas Mouth.mp3

Extras

The initial idea was just a movement-triggered light to make sure I remember to turn it off when I leave the house. But I decided to do something more fun than that! The reason I ended up sending a signal to the Windows laptop instead of playing the video on the RPi is because the RPi is too weak. The video full screen would just lag too much and connecting a speaker, let alone a bluetooth one to it was starting to take too much time.

Enjoy!