Only three slots are considered for Simplification in this Parking System.
The system consists of Arduino Mega 2560, Ethernet Shield (W6100), Blynk App, and Ultrasonic Range Finder Module (HC-SR04). Sensors are used to detect the presence of a Vehicle. As soon as a vehicle is detected in a particular slot and the corresponding led on the App goes high.
The Blynk app can be downloaded from the play store as well as the iOS.