This section talks about using LCDproc with a point of sale ("POS") character-display. The serialPOS driver is currently working with the AEDEX emulation protocol, and may support Epson ESC/POS and Logic Controls. It can be extended to work with various other protocol displays. The driver should operate most character POS displays with a serial (RS-232) input. Because these displays use a standardized protocol, if the protocol is supported by your display, it should work as expected. Feedback is welcome. Protocol Display tested Currently Supported Remark AEDEX Emax Yes IEE No Epson No Yes Emax No IBM No Logic Controls No Yes Ultimate No (…): Feature not tested. Connecting the display should consist of simply plugging it into your computer's RS-232 serial port. Because these displays typically support full RS-232, no additional wiring is needed. If your computer does not have such a port (many newer computers don't), you can use a USB to serial adapter with a driver provided by the adapter manufacturer. If your display supports a pass-through function, you can connect an RS-232 keyboard or terminal to the pass-through port. This will allow you to input keystrokes to LCDproc and control features and menus. Use the pass-through keyboard's arrow, delete, and return keys by default. If your display supports a pass-through function, but you do not have another RS-232 device connected to the pass-through port, you may experience hangs if an improperly formatted command sneaks through. This is because the display is waiting for the pass-through device to accept the data and a blocking state is created within the display. You can either connect another RS-232 device or use a wire to jumper the CTS and RTS pins together within the display. Device = DEVICE Device to use in serial mode. Usual values are /dev/ttyS0 or /dev/cu.usbserial. Default is /dev/lcd. Size = ¶meters.size; Specifies the size of the VFD in characters. If not given, it defaults to 16x2. Type = { IEE | AEDEX | Epson | Emax | IBM | LogicControls | Ultimate } Set the communication protocol to use with the POS display. If not specified it defaults to AEDEX. Currently, only AEDEX is supported. Speed = { 1200 | 2400 | 9600 | 19200 | 115200 } Set the the baud rate communication with the POS display. If not given the default of 9600 is used.