2.several detectors as one group to support one led indicator,if all occupied,it will be in red,or in green
1. Wireless Ultrasonic Detector
Wireless ultrasonic detector detects the parking space status, then transmit the detect information to related wireless zone controller via RF signal. Meanwhile, wireless zone controller will collect these information and forward to wireless router which connected to wireless central controller by Wifi. After acquiring the whole garage parking information, the wireless central controller would send the updated information to every LED screen in the car park by LED screen controller via wireless router. It realizes the parking guidance function through above procedure.