I'm pretty new to this stuff but I'm wanting to get involved. I was hoping to get some ideas on how people would tackle the monitoring of car park spaces? I have 6 car parks and I would like to monitor these spaces and talk to a webserver to show if there in use or not. Empty or occupied. From a little reading around I think I could accomplish this using and Arduino and Ultrasonic sonic sensor which will sit at the front of the car space, which is a wall.. then somehow connect the audrino to a network and go from there? Anyone think of a better way of doing this? suggestions welcome.