The system has up to 60 zone control units, with each having 60 ultrasonic based parking detectors. The detectors are used with LED indicators to guide vehicles to nearest vacant parking spaces. The updated information is shown on zone control units as well as outdoor LED screens. All the communication takes place is proprietary designed over RS-485 electrical standard. There is also an online and offline management software for showing all the information.
My contribution to the project is the complete design and implementation of parking detectors and LED indicators, and establishing communication with the zone control units.