Operate an STU tablet in serial mode

Operating an STU tablet in serial communications mode

Hardware Configuration

Two STU models support the serial communications interface:

  • STU-430V
  • STU-540

The tablets can be configured for:

  • Human Interface Device (HID) - standard USB connection or
  • Virtual COM Port (VCP) - serial connection over USB

STU Serial Connection describes how to:

  • Select the serial communication mode of operation
  • Determine which COM port an STU tablet is connected to

Signature SDK Configuration

The following registry values are required for the Signature SDK to use the serial interface.

In a potential installation with the tablet connected to COM5 using the standard baud rate 128000:

32-bit Signature SDK on 64-bit Windows (i.e. the typical sign pro PDF installation)

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Florentis\sd]
"stuPort"="COM5"
"stuBaudRate"=dword:0001f400

32-bit Signature SDK on 32-bit Windows or 64-bit Signature SDK on 64-bit Windows

[HKEY_LOCAL_MACHINE\SOFTWARE\Florentis\sd]
"stuPort"="COM5"
"stuBaudRate"=dword:0001f400

Registry values may be overridden directly by the application with SetProperty().

Having made the necessary settings, test signature capture with the Capture Analyser to confirm the installation.