NavPad
Technical Manual 
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Storm, Storm Interface, Storm AXS, Storm ATP, Storm IXP , Storm Touchless-CX, AudioNav, AudioNav-EF and NavBar are trademarks of Keymat Technology Ltd. All other trademarks are the property of their respective owners.
Storm Interface is a trading name of Keymat Technology Ltd
Storm Interface products include technology protected by international patents and design registration. All rights reserved
Product Features
Kiosks, ATMs, ticketing machines and voting terminals usually present information about available products and services via a visual display or touch screen. NavPad™ is a highly tactile interface that improves accessibility, making audio navigation and selection of screen based menus possible. An audio description of available menu options is transmitted to the user through a headset, handset or cochlea implant. When the desired menu page or menu option is located it can be selected by the press of a distinctive tactile button..
Storm Assistive Technology Products provide improved accessibility for those with impaired vision, restricted mobility or limited fine motor skills.
The Storm NavPad is intended for use as the tactile/audio interface for any ADor EN301-549 compliant application.
Coloured and backlit keys make the location of individual keys much easier for those with partial vision. The keytop’s distinctive shape and tactile symbols provide the primary means of identifying a key’s specific function.
Keypad
- 6 or 8 key versions.
- Option for desktop version or under panel installation to a 1.2mm – 2mm panel only.
- Audio versions have illuminated 3.5mm audio jack socket (illumination under software control)
- Beeper on under panel versions only(duration controlled by software)
- Mini-USB socket for connection to host
Illuminated version has white keys – illumination is switched on when headphones plugged in.
USB 2.0 Interface
- HID keyboard
- Supports standard modifiers, i.e. Ctrl, Shift, Alt
- HID consumer controlled device
- Advanced audio device
- No special drivers required
- Audio Jack Insert / Removal sends USB code to host
- Audio Jack socket is illuminated.
- Versions with microphone support need to be set as the default recording device in the Sound Panel
- Products with microphone support have been tested with the following voice assistants:- Alexa, Cortana, Siri and Google Assistant.
Support Tools
The following support software tools are available for download at www.storm-interface.com
- Windows Utility for changing the USB Code Tables and control of illumination / beeper.
- API for custom integration
- Remote Firmware update tool.
Typical method for audio module volume control using the API
| User Action – Plug in the headphone jack | Host – Host system detects the connection – Repeating message generated by the host application software : “ Welcome to the audio menu. Press the select key to begin” |
| User Action – Press the select key | Host – Activate the Volume Control function – Repeating message : “Use the up & down keys to change the volume. Press the select key when finished” |
| User Action – Adjust the volume – Press the select key | Host – De-activate the volume control function “Thank you. Welcome to the (next menu)” |
Alternate method for audio volume control using the API
| User Action – Plug in the headphone jack | Host – Host system detects the connection – Sets volume level to initial default – Repeating message : “Press the volume key at any time to increase the volume level” |
| User Action – Presses the volume key | Host – Message stops if volume key is not pressed inside 2 seconds. Host – Host system changes the volume on each key press (up to a max limit, then revert to default) |
Product Range
NavPad™ Keypad 
EZ08-22301 NavPad 8-Key Tactile Interface – Underpanel, w/2.0m USB cable
EZ08-22200 NavPad 8-Key Tactile Interface – Desktop, w/2.5m USB cable
NavPad™ Keypad with integrated audio 
EZ06-23001 NavPad 6-Key Tactile Interface & Integrated Audio – Underpanel, no cable
EZ08-23001 NavPad 8-Key Tactile Interface & Integrated Audio – Underpanel, no cable
EZ08-23200 NavPad 8-Key Tactile Interface & Integrated Audio – Desktop, w/2.5m USB Cable
NavPad™ Keypad with integrated audio – Illuminated
EZ06-43001 NavPad 6-Key Tactile Interface & Integrated Audio – Backlit, Underpanel, no cable
EZ08-43001 NavPad 8-Key Tactile Interface & Integrated Audio – Backlit, Underpanel, no cable
EZ08-43200 NavPad 8-Key Tactile Interface & Integrated Audio – Backlit, Desktop, w/2.5m USB Cable
Rear Case
Desktop
Underpanel
Underpanel Illuminated
Specifications
| Rating | 5V ±0.25V (USB 2.0), 190mA (max) |
| Connection | mini USB B socket (desktop versions have cable fitted) |
| Audio | 3.5mm audio jack socket (illuminated) Output level 30mW per channel max into a 32ohm load |
| Ground | 100mm Earth Wire with M3 ring terminal (underpanel versions) |
| Sealing Gasket | included with underpanel versions |
| USB Cable | included in some versions, see specific product brochure for more information |
The illuminated NavPads also support voice command:-
Microphone input
Mono microphone input with bias voltage suitable for headset microphones (CTIA connection)
Dimensions (mm)
| Underpanel version | 105 x 119 x 29 |
| Desktop version | 105 x 119 x 50 |
| Packed Dims | 150 x 160 x 60 (0.38 kg) |
| Panel Cutout | 109.5 x 95.5 Rad 5mm corners. |
| Underpanel Depth | 28 mm |
Mechanical
| Operational Life | 4 million cycles (min) per key |
Accessories
| 4500-01 | USB CABLE MINI-B TO TYPE A, 0.9m |
| 6000-MK00 | PANEL FIXING CLIPS (PACK OF 8 CLIPS) |
Use to install into a 1.6 – 2mm steel panel Refer to drawing EZK-00-33 for cutout dims
Performance/Regulatory
| Operational Temp | -20°C to +70°C |
| Weather Resistant | IP65 (front) |
| Impact Resistance | IK09 (10J Rating) |
| Shock & Vibration | ETSI 5M3 |
| Certification | CE / FCC / UL |
Connectivity
The USB interface comprises an internal USB hub with connected keyboard and audio module.
This is a composite USB 2.0 device and no additional drivers are required.
PC based software utility and API are available to set/control: –
- Volume key function
- Illumination on audio jack socket
- Illumination on keys (backlit version only)
- Customise the USB codes
USB Device Information
USB HID
The USB interface comprises a USB HUB with keyboard device and audio device connected.
The following VID/PID combinations are used:
| For USB HUB: | For Standard Keyboard/Composite HID/ Consumer Controlled device | For USB Audio device |
| • VID – 0x0424 • PID – 0x2512 | • VID – 0x2047 • PID – 0x09D0 | • VID – 0x0D8C • PID – 0x0170 |
This document will concentrate on the Standard Keyboard/Composite HID/Consumer Controlled device.
This interface will enumerate as
- Standard HID Keyboard
- Composite HID-datapipe Interface
- HID Consumer Controlled device
One of the advantages of using this implementation is that no drivers are required.
The data-pipe interface is used to provide the host application to facilitate customisation of the product.
Supported Audio Jack Configurations
The following jack configurations are supported.
Note: Application software should always ensure the same audio is present on both Left and Right Channels for correct mono operation.
Device Manager
When connected to a PC, the NavPad™ + audio keypad should be detected by the operating system and enumerate without drivers. Windows shows the following devices in the Device Manager:
Code Tables
Default Table
| Key Description | KEY LEGEND | TACTILE IDENTIFIER | KEY COLOR | USB Keycode |
| Home/Menu Help End Back Next Up Down Action Detection of headphone connection inserted removed | << ? >> BACK NEXT | < :. > < > ˄ ˅ O | BLACK BLUE RED WHITE WHITE YELLOW YELLOW GREEN WHITE | F23 F17 F24 F21 F22 F18 F19 F20 F15 F16 |
Alternate Multimedia Table
| Key Description | KEY LEGEND | TACTILE IDENTIFIER | KEY COLOR | USB Keycode |
| Home/Menu Help End Back Next Volume Up Volume Down Action Detection of headphone connection inserted removed | << ? >> BACK NEXT | < :. > < > ˄ ˅ O | BLACK BLUE RED WHITE WHITE YELLOW YELLOW GREEN WHITE | F23 F17 F24 F21 F22 F20 F15 F16 |
For the Volume up/down keys a volume up/down report will be sent to the PC according to the HID descriptor setup for HID consumer controlled device. The following report will be sent:
Volume UP key <0x01><0x02>
Volume DOWN key <0x01><0x04>
Default – Illuminated
| Key Description | KEY LEGEND | TACTILE IDENTIFIER | ILLUMINATION COLOR | USB Keycode |
| Home/Menu Help End Back Next Up Down Action Detection of headphone connection inserted removed | << ? >> BACK NEXT | < :. > < > ˄ ˅ O | WHITE BLUE WHITE WHITE WHITE WHITE WHITE GREEN WHITE | F23 F17 F24 F21 F22 F18 F19 F20 F15 F16 |
Key illumination is turned on when headphone jack is inserted.
Using the NavPad Windows Utility to change USB Codes
Note that there are 2 Windows Utility packages available for download:
- Standard NavPad
- Illuminated NavPad
Please ensure you use the correct one as shown below
If any other keypad utility software is installed (e.g EZ-Key Utility) then you should un-install that before you start.
Non illuminated NavPad utility
To be used with the following part numbers:
EZ08-22301
EZ08-22200
EZ06-23001
EZ08-23001
EZ08-23200
Illuminated NavPad utility
To be used for the following part numbers:
EZ06-43001
EZ08-43001
EZ08-43200
System Requirements
The utility requires .NET framework to be installed on the PC and will communicate over the same USB connection but via the HID-HID data pipe channel, no special drivers are required.
Compatability
| Windows 11 |  |
| Windows 10 | |
The utility can be used to configure the product for:
- LED On/Off
- LED brightness (0 to 9)
- Buzzer On/Off
- Buzzer Duration (¼ to 2 ¼ seconds)
- Load customised keypad table
- Write default values from volatile memory to flash
- Reset to factory default
- Load Firmware
Note that non-audio versions also support multiple key press combinations.
Change History
| Engineering Manual | Date | Version | Details |
| 11 May 15 | 1.0 | First Release | |
| 01 Sep 15 | 1.2 | API added | |
| 22 Feb 16 | 1.3 | Added screenshots for Firmware Updating | |
| 09 Mar 16 | 1.4 | Updated tactile symbols on keytops | |
| 30 Sep 16 | 1.5 | Added EZ Access copyright note page 2 | |
| 31 Jan 17 | 1.7 | Changed EZkey to NavPad™ | |
| 13 Mar 17 | 1.8 | Update to firmware 6.0 | |
| 08 Sep 17 | 1.9 | Added Remote Update Instructions | |
| 25 Jan 18 | 1.9 | Added RNIB logo | |
| 06 Mar 19 | 2.0 | Added Illuminated versions | |
| 17 Dec 19 | 2.1 | Removed 5 key version | |
| 10 Feb 20 | 2.1 | WARF info removed page 1 – no issue change | |
| 03 Mar 20 | 2.2 | Added desktop and non-audio versions | |
| 01 Apr 20 | 2.2 | Product name changed from Nav-Pad to NavPad | |
| 18 Sep 20 | 2.3 | Added note re Voice Assistant Support | |
| 19 Jan 21 | 2.4 | Updates to Utility – see below | |
| 2.5 | Added Audio Output level to spec table | ||
| 11 Mar 22 | 2.6 | Buzzer removed from Desktop versions | |
| 04 Jul 22 | 2.7 | Note added re loading config file from network | |
| 15 Aug 24 | 2.8 | Utility / API / Downloader info removed and split out into separate documents |
| Firmware – std | Date | Version | Details |
| bcdDevice = 0x0200 | 23 Apr 15 | 1.0 | First Release |
| 05 May 15 | 2.0 | Updated so that only vol up / down works as a consumer device. | |
| 20 Jun 15 | 3.0 | Added SN set/retrieve. | |
| 09 Mar 16 | 4.0 | Jack In/Out debounce increased to 1.2 sec | |
| 15 Feb 17 | 5.0 | Change 0x80,0x81 work as multimedia codes. | |
| 13 Mar 17 | 6.0 | Improve stability | |
| 10 Oct 17 | 7.0 | Added 8 digit sn, improved recovery | |
| 18 Oct 17 | 8.0 | Set default brightness to 6 | |
| 25 May 18 | 8.1 | Changed behaviour (from beep to LED flash) when unit powered but not enumerated. | |
| Firmware – illuminated | Date | Version | Details |
| 6 Mar 19 | EZI v1.0 | First Release | |
| 06 Jan 21 | EZI v2.0 | Fix to retain LED settings on reconnection | |
NavPad – Technical Manual Rev 2.8
www.storm-interface.com
Documents / Resources
 | Storm Interface NavPad Audio Enabled Keypads [pdf] Instruction Manual NavPad Audio Enabled Keypads, NavPad, Audio Enabled Keypads, Enabled Keypads, Keypads |