There's an updated version of CFTEST here.


Part Number: cfTest


  • Demonstrates features of Crystalfontz Intelligent LCD modules.
  • Allows experimenting with the LCD's command set.
  • Example data may be copied from the display module's datasheet and pasted into the Command Window.
  • Sends any binary code from 0 to 255.
  • "Packet Debugger" shows a record of the commands sent and received.
  • Demonstrates software techniques:
    • Send and receive packets.
    • Read fan RPM or set fan power.
    • Display keystrokes.
    • Set LCD contents.
  • Supports speed of 1200 to 115200 baud.
  • Software is supported under 32-bit and 64-bit Windows.
  • Executable runs directly: no installation required. You can just delete it when you are done.
  • Windows version recently updated (11/2020) to support newest version of the CFA835
  • If you have questions or comments, please send an email to

Help Us Improve Our Product Offerings?