When the user taps on that icon then it directs on that particular application. In Android device, push messages are shown with the app icon and a message in the status bar. This service help the user to continue their work while the important information pop-ups on screen. However you can turn off push notifications from a particular app. Almost all mobile platforms support push notifications and most of the apps send notifications as push messages like Facebook, amazon, chrome etc. These messages are pushed by a backend server which contains some information related to latest offers, promotions, advertisements, scores etc. Push notifications are just like instant messages that pops up on a smartphone or desktop/laptops. What is Push Notification and How it Works? To start using Raspberry pi, either you should have a display monitor which can be connected using HDMI cable or you can access it using SSH terminal or VNC server. In our previous projects, we controlled Raspberry Pi GPIO with various IoT platforms. Raspberry Pi is the most suitable microcontroller for IoT projects as it has inbuilt Wi-Fi to connect with internet easily.

This system can be installed near the door of your home or office and you can get the live notification if someone enters in your house. Raspberry Pi is used to control the whole system and PIR sensor used to detect any motion. This system will detect the presence of Intruder and quickly alert the user by sending a Push notification to their phone. So here we are building a simple yet useful Home Security System using Raspberry Pi and PIR Sensor.

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