STU Installation
Contents
- Choosing an STU
- STU Device Specifications
- STU Driver
- STU Driver - delete cache
- STU HID Diagnostic Tool
- STU Utilities
- STU Serial Connection
Choosing an STU
In addition to price considerations please bear in mind the following factors:
- If you want to use your signature pad over RDP then there are currently (Feb 2021) two options:
Purchase a separate USB forwarding tool to handle the pen data over the network connection)
Choose an STU which operates serially i.e. the 430V (a serial STU) or 540 (which can be switched into serial mode if needed)
NOTE: The uploading of colour images over a serial connection to a colour STU is too slow to be user-friendly and for this reason the 540 allows for the pre-uploading of images into ROM for superior response times. This requires special handling in the application.
If you need to capture signatures over Citrix then please see our Citrix Compatibility list
The 300, 430 and 430V provided limited screen space so if you need to display a lot of information for the user to read prior to signing then it would probably be better to choose a 540.
The STU-541 is primarily aimed at installations where a high degree of security is required in the data transmission between the pad and the PC. The 541 uses TLS encryption to deliver this.
STU Device Specifications
| Model | Pressure levels | Sampling rate | Max. resolution | Active screen area | I/O | Monochrome/colour |
|---|---|---|---|---|---|---|
| STU-300* | 512 | 200 Hz | 396 x 100 | 99 x 25 mm | USB | Monochrome |
| STU-300B | 512 | 200 Hz | 396 x 100 | 99 x 25 mm | USB | Monochrome |
| STU-430 | 1024 | 200 Hz | 320 x 200 | 96 x 60 mm | USB | Monochrome |
| STU-430V | 1024 | 200 Hz | 320 x 200 | 96 x 60 mm | Serial | Monochrome |
| STU-500* | 512 | 200 Hz | 640 x 480 | 102 x 76 mm | USB or serial | Monochrome |
| STU-520* | 512 | 200 Hz | 800 x 480 | 104 x 60 mm | USB | Colour |
| STU-530 | 1024 | 200 Hz | 800 x 480 | 108 x 65 mm | USB | Colour |
| STU-540 | 1024 | 200 Hz | 800 x 480 | 108 x 65 mm | USB or serial | Colour |
| STU-541 | 1024 | 200 Hz | 800 x 480 | 108 x 65 mm | USB | Colour |
Models marked with a "*" are no longer in production
STU Driver
Download and run Wacom-STU-Driver-5.4.5.exe
Requirements
The driver is required to use colour STU signature pads with the STU SDK and Wacom Signature SDK. The driver is also required when using any STU signature pad on Windows 8 or 8.1.
Summary
The driver is required for the colour display STU signature pads and also when using any of the STU signature pads on Windows 8.1.
It allows the device to use USB Bulk Transfer to handle the transfer of increased image data size (compared with the mono STU tablets).
On Windows 8 and 8.1 it also disables the Enhanced Power Management setting.
The driver installation merely configures the USB interface for the STU tablet and can be used in all configurations without any detrimental effect.
The need for installation is dependent on the STU model and Windows version as follows:
| STU Model | Windows 7 | Windows 8 | Windows 10 | Windows 11 |
|---|---|---|---|---|
| STU-300, STU-500 | Not required | Required to prevent power save disconnect | Not required | Not required |
| STU-520 | Required for faster image upload | Required for faster image upload and to prevent power save disconnect | Required for faster image upload | Required for faster image upload |
| STU-430 | Not required | Not required | Not required | Not required |
| STU-530 | Required for faster image upload | Not required | Recommended for optimum image upload speed | Recommended for optimum image upload speed |
| STU-540 | Required for faster image upload | Not required | Recommended for optimum image upload speed | Recommended for optimum image upload speed |
| STU-541 | Required for faster image upload | Not required | Recommended for optimum image upload speed | Recommended for optimum image upload speed |
If in any doubt we recommend installing it.
Instructions
Using Wacom-STU-Driver.exe
- Check that the STU tablet has been disconnected before running the installer.
- Download the .exe and run it directly from Windows Explorer or in a DOS command line.
- The .exe autodetects 32 or 64 bit Windows and installs accordingly.
To view the available options use the command:
Wacom-STU-Driver.exe /?
For example, for minimal prompts:
Wacom-STU-Driver.exe /quiet
To disable the check for STU connection:
Wacom-STU-Driver.exe NO_STU_CHECK=1
To uninstall the driver:
Wacom-STU-Driver.exe NO_STU_CHECK=1 /uninstall /q
Note for Windows 7
To use the /q option the installer must be run in elevated mode to give Administrator rights, e.g.:
Start -> All Programs -> Accessories -> Right-click <Command Prompt>: 'Run as Administrator'
STU Driver - delete cache
Download
Download and unzip reg-delete-wacom-usb-cache.zip
| Function | From zip file |
|---|---|
| Delete Wacom USB cache exe | reg-delete-wacom-usb-cache.exe |
| Companion debug file for use as instructed by Support | reg-delete-wacom-usb-cache.pdb |
Requirements
Installation of an STU tablet.
Summary
Use the delete cache utility if the STU appears to be not working after installing the driver and attempting to use STU Utilities
Run from a command line or File Explorer to delete registry entries related to a Wacom USB device:
C:\Test>reg-delete-wacom-usb-cache.exe
Description
Syntax: reg-delete-wacom-usb-cache.exe
First disconnect the STU device.
The utility prompts to allow changes to your device.
It then searches for Windows registry entries related to Wacom USB and deletes those found, e.g.:
Wacom Device USB Cache Cleaner
USB\VID_056A&PID_00A1 : The operation completed successfully.
HID\VID_056A&PID_00A1 : The operation completed successfully.
Press any key...
On completion reconnect the STU device which will then be reloaded by Windows.
STU HID Diagnostic Tool
Installation
Download hidinfo-x86-v2.6.14745.41.zip
Requirements
Installation of an STU tablet.
Colour models require the STU driver
Download and unzip the diagnostic to run on 32 or 64 bit Windows.
Summary
Download and use the tool according to the directions provided by your support engineer.
Normally you will need to run the following command in a Dos prompt and email the resulting text file:
C:\Test>hidinfo.exe all > hidinfo.txt
Description
Syntax: hidinfo [options]
Options:
- filename displays underlying filename
- kernel displays kernel handle
- attr displays HID attributes as reported by HidD
- caps displays the report IDs of the capabilities
- all displays everything
- /? help
Run hidinfo.exe using a Command Prompt:
C:\Test>hidinfo.exe
The STU device report should be similar to one of the following examples:
056a:00a2:0068 [xRW] Manufacturer="Wacom Co.,Ltd." Product="STU-300" SerialNumber="\x0409"
056a:00a1:0101 [xRW] Manufacturer="Wacom Co.,Ltd." Product="STU-500" SerialNumber="\x0409"
056a:00a3:0101 [xRW] Manufacturer="Wacom Co.,Ltd." Product="STU-520A" SerialNumber="\x0409"
In the examples shown, the device accessibility is described as [xRW]
- The first character ('x' or 's') denotes exclusive or shared access.
- The second character ('R') denotes read access.
- The third character ('W') denotes write access.
Note: By default the signature software requires exclusive-read-write access to the device to operate successfully.
In some installations other applications or installed drivers may access the device in shared mode.
In this case, only shared access is possible: [sRW] indicates the device is only available for shared-read-write access.
Note, this will prevent the signature software operating successfully.
If another application has opened the device for exclusive access, then "hidinfo" will be unable to open the device and will report an error.
This is typically:
[Open failed] [system_error: win32api:32 The process cannot access the file because it is being used by another process. ]
"hidinfo" determines the available access by a process of elimination using standard API calls to the Windows CreateFile API.
It will try in sequence:
CreateFile(fileName, GENERIC_READ|GENERIC_WRITE, 0 , ...
CreateFile(fileName, GENERIC_READ , 0 , ...
CreateFile(fileName, 0 , 0 , ...
CreateFile(fileName, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, ...
CreateFile(fileName, GENERIC_READ , FILE_SHARE_READ|FILE_SHARE_WRITE, ...
CreateFile(fileName, 0 , FILE_SHARE_READ|FILE_SHARE_WRITE, ...
STU Utilities
Installation
- Download, extract and run the STU Utilities
- Download and extract the STU Images
Requirements
Installation of STU tablet.
Colour models require the STU driver
Download and unzip the 32-bit utilities to run on 32 or 64 bit Windows.
Summary
STU Utilities are standalone programs which you can use to test the operation of an STU signature pad.
They can be used without installing the STU SDK.
Where applicable a Console version of the program is included, identified by a C suffix, e.g.
ClearScreenC.exe
These applications use the Command Prompt and do not display a Window.
ClearScreen.exe
Clears the tablet display
HardwareReset.exe
Performs a hard reset of the tablet firmware
Identify.exe
Reports the tablet detected:
In addition the test displays properties on the LCD display. e.g.
STU-520A fw: 1.01 Security-IC:0.4.153.24
Bulk Driver: in use
Tablet extent: 10400 x 6048 Pressure levels: 511
Screen extent: 800 x 480
Report rate: 200
Resolution: 2540
Encryption: DISABLED
Uid: 00:00:00:00
PenData.exe
Reports the Device connected status with real-time pen data:
SendToSTU.exe
Sends the specified image file to the device (see /? for options).
STU-Images.zip contains suitable image files:
| STU Model | Name of image file |
|---|---|
| STU-300 | 396x100.png |
| STU-430 | 320x200.png |
| STU-500 | 640x480.png |
| STU-520 | 800x480.png |
| STU-530 | 800x480-530.png |
| STU-540 | 800x480-540.png |
| STU-541 | 800x480-541.png |
SoftReset.exe
Performs a soft reset of the tablet firmware
STU Serial Connection
Installation
Download the Serial Connection Utilities and DemoButtons Test tool
The Serial Connection Utilities zip file contains the following tools:
| Utility | Description |
|---|---|
| query.exe | Displays STU firmware information |
| simpleInterface.exe | Displays realtime pen data |
| hid2serial.exe | Switches from HID to Serial |
| serial2hid.exe | Switches from Serial to HID |
| getSerialPorts.exe | Lists visible COM ports |
| libeay32.dll | Encryption library needed in some Windows installations |
| DemoButtons.exe | Test signature capture via COM port |
Overview
Certain STU models support the serial communication 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
Used in a Command Prompt, the connection utilities provide tools to verify and change the connection mode.
Utilities
query
Use this utility to determine the current state of the tablet.
For a USB connection:
query.exe
For a serial connection:
query.exe COM_PORT BAUDRATE
If the tablet is in HID mode its status will be reported.
If it is in serial mode the results will be:
->query.exe
STU query sample
No USB devices found
getSerialPorts
To find the COM port use getSerialPorts:
->getSerialPorts.exe
COM1 physical
COM6 virtual
When in serial mode the STU tablet appears as a virtual COM port. The virtual com port can then be used with query, specifying the port name and baudrate:
->query.exe com6 128000
NOTE for COM10 and above: COM10 and above require special handling. See Microsoft support
Example:
-> query \\.\COM10
->query.exe com6
STU query sample
connecting to com6 128000
Status.statusCode = Ready
Status.lastResultCode = None
Status.statusWord = 00
HidInformation = 056a:00a6:0104
Information.modelName = STU-430V
Information.firmwareMajorVersion = 01
Information.firmwareMinorVersion = 04
Information.secureIc = 0
Information.secureVersion = bb.0.0.0
Capability.tabletMaxX = 9600
Capability.tabletMaxY = 6000
Capability.tabletMaxPressure = 1023
Capability.screenWidth = 320
Capability.screenHeight = 200
Capability.maxReportRate = 200
Capability.resolution = 2540
Capability.encodingFlag = 1bitZlib
Uid = 0x00000000
Uid2 = 5JZQS00032
Eserial - not supported
DefaultMode = Serial
RenderingMode - not supported
ReportRate = 150
HostPublicKey - not supported
DevicePublicKey - not supported
DHprime - not supported
DHbase - not supported
InkingMode = Off
InkThreshold.onPressureMark = 21
InkThreshold.offPressureMark = 16
HandwritingThicknessColor.penColor = 0000
HandwritingThicknessColor.penThickness = 2
BackgroundColor - not supported
HandwritingDisplayArea.upperLeftXpixel = 0
HandwritingDisplayArea.upperLeftYpixel = 0
HandwritingDisplayArea.lowerRightXpixel = 319
HandwritingDisplayArea.lowerRightYpixel = 199
BacklightBrightness - not supported
ScreenContrast - not supported
HandwritingThicknessColor24.penColor = 000000
HandwritingThicknessColor24.penThickness = 2
BackgroundColor24 - not supported
PenDataOptionMode = None
OperationMode - not supported
RomImageHash - not supported
ReportSizeCollection =
PenData 7
Status 5
Reset 2
HidInformation 9
Information 17
Capability 17
Uid 5
Uid2 11
DefaultMode 3
ReportRate 2
RenderingMode -
Eserial -
PenDataEncrypted 17
HostPublicKey -
DevicePublicKey -
StartCapture 5
EndCapture 2
DHprime -
DHbase -
ClearScreen 2
InkingMode 2
InkThreshold 5
ClearScreenArea 11
StartImageDataArea 11
StartImageData 2
ImageDataBlock 256
EndImageData 2
HandwritingThicknessColor 4
BackgroundColor -
HandwritingDisplayArea 9
BacklightBrightness -
ScreenContrast -
HandwritingThicknessColor24 5
BackgroundColor24 -
BootScreen 2
PenDataOption -
PenDataEncryptedOption -
PenDataOptionMode 2
PenDataTimeCountSequenceEncrypted 17
PenDataTimeCountSequence 11
EncryptionCommand 68
EncryptionStatus 17
GetReport -
SetResult -
PinPadData -
PinPadDataEncrypted -
PinOperationMode -
OperationMode -
RomStartImageData -
RomImageOccupancy -
RomImageHash -
RomImageDelete -
CurrentImageArea -
EventData -
EventDataEncrypted -
RomImageDisplay -
160 5
162 5
163 17
171 12
178 3
180 3
181 11
ReportSizeCollection 512
->
simpleInterface
Use this utility to display realtime pen data.
When the pen is in contact or in close proximity of the tablet surface, the X/Y coordinates and pressure values will be reported.
simpleInterface.exe COM_PORT BAUDRATE
Press Ctrl-C to exit the program.
->simpleInterface.exe com6
STU simpleInterface sample
connecting to com6 128000
Connected!
getInformation()... modelName=STU-430V firmware=01.04.187
getReportRate()... 150
setPenDataOptionMode(SequenceNumberTimeCount)... ok!
getPenDataOptionMode()... penDataOptionMode=TimeCountSequence
setClearScreen()... ok!
setInkingMode(On)... ok!
(use stylus, press CTRL-C to quit)
rdy sw x y pres time seq
1 1 612 5339 3528 3513 1
1 1 612 5339 3528 3516 2
1 1 614 5339 3528 3523 3
1 1 615 5329 3518 3529 4
1 1 620 5329 3518 3536 5
1 1 624 5329 3518 3543 6
1 1 627 5329 3518 3549 7
1 1 630 5318 3513 3556 8
1 1 632 5307 3506 3563 9
1 1 633 5289 3493 3569 10
1 1 625 5253 3468 3576 11
1 1 593 5189 3422 3583 12
1 1 470 5094 3348 3589 13
1 1 263 4971 3247 3596 14
1 1 64 4819 3111 3603 15
1 0 0 4664 2960 3609 16
1 0 0 4502 2795 3616 17
1 0 0 4356 2634 3623 18
1 0 0 4228 2484 3629 19
1 0 0 4124 2350 3636 20
1 0 0 4068 2263 3643 21
0 0 0 0 0 3696 22
quitting!
setInkingMode(Off)... ok!
setClearScreen()... ok!
setPenDataOptionMode(None)... ok!
->
hid2serial
Use this utility to change the STU to serial VCP mode. No parameters are required.
You can verify that the STU is in serial mode by viewing the serial ports with getSerialPorts.exe.
Verify the connection using query.exe:
query.exe COM_PORT BAUDRATE
->hid2serial.exe
STU HID2serial sample
Device:
056a:00a8:0100
Status.statusCode = 0
Status.lastResultCode = 0
Status.statusWord = 00
Information.modelName = STU-540
Information.firmwareMajorVersion = 01
Information.firmwareMinorVersion = 00
Information.secureIc = 0
Information.secureVersion = 0.0.0.0
setDefaultMode()...
Done!
Status.statusCode = 0
Status.lastResultCode = 0
Status.statusWord = 00
Rebooting device
->
In addition you can view the connection in Windows Device Manager.
An HID connection appears as shown below.
A serial connection appears as follows:
Normally Windows automatically installs the FTDI driver needed to create the VCP. If the tablet is reported as the following:
**Future Devices Single RS232-HS**
then download and install the driver from: http://www.ftdichip.com/Drivers/VCP.htm](http://www.ftdichip.com/Drivers/VCP.htm
For example: http://www.ftdichip.com/Drivers/CDM/CDM21218_Setup.zip
NOTE ON SERIAL KIT
A serial kit is available for the STU-540. It includes:
- Serial D-type to tablet cable
- Power supply
When the serial kit is used the tablet must still be switched to serial mode but can be connected to a physical serial port.
In this case a different baud rate is used as follows:
>query COM1 115200
serial2hid
Use this utility to restore the default STU tablet HID connection mode.
serial2hid.exe COM_PORT BAUDRATE
You can confirm the HID connection using query.exe.
serial2hid.exe com6 128000
serial to hid STU query sample
serial2hid serialPort baudRate
{processReadBuffer size=22}
{queued report: size= 17 08 53 54 55 2d 35 34 30 00 00 01 00 00 02 00 00 00}
{removing 22 bytes}
Information.modelName = STU-540
Information.firmwareMajorVersion = 01
Information.firmwareMinorVersion = 00
{processReadBuffer completed
{processReadBuffer size=5}
{queued report: size= 2 81 00}
{removing 5 bytes}
{processReadBuffer completed
{processReadBuffer size=5}
{queued report: size= 2 81 00}
{removing 5 bytes}
{processReadBuffer completed
DemoButtons
Captures a signature from the STU pad with options to perform via standard HID mode or via a virtual COM port.
Signature Mode can also be selected for use with the STU 540.
