The Internet of Things or IoT refers to the network which is formed with billions of physical devices around the globe that are connected to the internet, all of which are collecting, processing, and sharing data.
Today we will be working on a Water level indicator whose data can be monitored through a webpage over a local area network. The water level will be detected by using an ultrasonic distance measurement sensor.
HC-SR501 Motion Sensor usually known as the PIR sensor is used in many kinds of Security Alarm Systems and Motion Detector systems. Instead of emitting infrared signals, it absorbs IR signals and that’s why it is called PIR (Passive Infrared) Sensor.
Raspberry Pi 4 is the improved version of Raspberry Pi 3 B+. Raspberry Pi 4 comes with Cortex-A72 quad-core processor running at 1.5GHz with memory bumped up to the LPDDR4. It has three times better processing performance and speed than the Raspberry Pi 3.