I ask again - what hardware? The port is simply interfacing. You cannot tell a car to park without something (hardware) between the port and the car.But my problem is interfacing the hardware with my programme.
use cheap and simple Relay Board as interface, there are 8 output (Data) to control 8 devices.Im using a DC motor as my Gate to the parking lot,a steper motor as my parking card dispencer,and an LDR coparator circuit as my sensor to check if the whole length of the car has passed b4 the gate closes and using the screen as my GUI to show how many cars have gone in and how much space is available, and a red LED to show the parking lot is full,and a green 1 to show the is still space, and a dip switches to enter pin because its a private company parking lot.
by Duane Benson
by Jake Hertz
by Jake Hertz
by Aaron Carman