The JSB-815 USB LCD Control Module allows user to communicate and control any LCD Character display unit that has a HD44780 compatible controller.  The JSB815 can read and write the modules Instruction and data registers. Displays that have two controllers (HD44780 compatible controllers) are also supported so only one JSB815 is required.  Each module has an unique serial number string which allows multiple USB devices to be controlled by the host USB controller as individual devices.