The CFontzPacket Driver
CrystalFontz offers a wide range of character and graphical LCD modules. The CFontzPacket driver supports the modules that communicate with the host computer using a packet-based communications protocol with 16-bit CRC (hence the driver name).
Currently this line of modules comprises the models:
CFA-631 	
20x2 character LCD with backlight
keypad with 4 keys: Up, Down, enter & Escape
USB connection for data and power
mounting bracket to fit into 3,5" drive bays
Optional (via add-on board) temperature sensor, fan and ATX power control connectors (all unsupported by LCDproc)
CFA-633 	
16x2 character LCD with backlight
keypad with 6 keys: 4 directions, Enter & Escape
serial or USB connection
mounting bracket to fit into 5,25" drive bays
Temperature sensor and fan control connectors (both unsupported by LCDproc)
CFA-533 	
This is the same as CFA-633 except it misses the fan control capabilities. The temperature monitoring is not supported in LCDproc though.
CFA-635 	
20x4 characters LCD with backlight
keypad with 6 keys: 4 directions, Enter & Escape
USB connection for data and power
four bi-color LEDs to show status information
optional mounting bracket to fit into 5,25" drive bays

Configuration in LCDd.conf

[CFontzPacket]
Model = { 533 | 631 | 633 | 635 } 	 Select the LCD model that is connected. Legal values for this option are 631, 533, 633, or 635, with the default being 633.
Device = DEVICE 	 Select the output device to use. It may be a serial device or a USB device in serial emulation mode. If not given, it defaults to /dev/lcd.
Mac OS X users may need to use one of the /dev/cu devices instead of the /dev/tty ones.
USB = 	 Enable this flag if the device is connected to an USB port. For serial ports leave it disabled. [default: no; legal: yes, no]
Size = 	 Select the LCD size. This overrides the size the driver uses for the selected model (631: 20x2, 533/633: 16x2, 635: 20x4).
You should usually not need to set this value!
Contrast = CONTRAST 	 Set the initial contrast. Legal values for CONTRAST are 0 - 1000. If not specified, it defaults to 560.
Brightness = BRIGHTNESS 	 Set the initial brightness [default: 1000; legal: 0 - 1000]
OffBrightness = BRIGHTNESS 	 Set the initial off-brightness [default: 0; legal: 0 - 1000] This value is used when the display is normally switched off in case LCDd is inactive
Speed = { 19200 | 115200 } 	 Override the default baud rate the driver uses for communication with the selected LCD model. Allowed values are 19200 (default for CFA-533 and CFA-633) and 115200 (default for the CFA631 and CFA635).
You should usually not need to set this value!
OldFirmware = 	 Very old 633 firmware versions do not support partial screen updates using 'Send Data to LCD' command (31). For those devices it may be necessary to enable this flag. [default: no; legal: yes, no]
Reboot = 	 Reinitialize the LCD's BIOS [default: no; legal: yes, no].