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Application Note

Demonstrating the Serial Port Profile (SPP)

Between BTW

2002/6/29

1. Introduction

As a technology leader in the wireless networking market, WIDCOMM’s vision is to enable

consumers to easily, conveniently and securely access information and services from their

Bluetooth devices anytime and anywhere – from homes, offices and public places.

• BTW™ is a set of software drivers and utilities that seamlessly integrate Bluetooth

technology into your desktop or laptop computer.

• BlueConnect™ is a Bluetooth Springboard™-compatible radio module for the

Handspring™ Visor™. This document describes the procedure for demonstrating the use of the

Serial Port Profile (SPP) to chat between a BlueConnect module on a Handspring Visor and a

Bluetooth USB dongle on a Microsoft Windows laptop or desktop computer. This document

was tested using the following configuration:

• A desktop or laptop computer with an available USB interface and running the

Microsoft Windows 2000 operating system.

• BTW version 1.2.1.14 or later.

• A Psion USB dongle running firmware version 114.

• A standard version of the Handspring Visor (running Palm OS 3.1) with a Bluetooth CF

card running the WIDCOMM version 3.0 software. The procedure is slightly different

under the Palm OS version 3.5.

• A terminal emulator under Windows 2000. Hyperterminal will work although it is not

recommended. This example utilizes an enhanced version of Hyperterminal which is

available for download from the Web.

NOTE: The procedure on a computer running other versions of the Microsoft Windows

operating system may be slightly different.

2. A Quick Overview of the Procedure

The basic procedure for running this demonstration is not complicated. On the Visor side,

WidChat acts like a simple terminal emulator that connects to another computer through a Serial

Port Profile (SPP) connection. Instead of a physical serial cable connecting the two computers,

a Bluetooth wireless link is used to simulate a serial connection. On the BTW/Windows side,

you can use any terminal emulator which runs under Windows and supports the Windows

Virtual COMM (VCOMM) port standard. Here is a quick overview of the process:

1) Install BTW 1.2 and a Psion dongle on your Windows Computer (98SE, 2000, Me, or

XP version)

2) Install Hyperterminal Private Edition or some other compatible terminal emulator on

your BTW system

3) Insert the BlueConnect 3.0 card into your Visor

4) Use the Visor to inquire for the BTW device

5) Use the Visor to discover the “Bluetooth Serial Port” service on the BTW system

6) Use the Visor to establish a connection to the “Bluetooth Serial Port” service on the

BTW system. You do this by starting WidChat on the Visor and using it to initiate a

connection.

7) Using the BTW dialogs, determine what Virtual COMM (VCOMM) port has been

assigned to the BTW side of the SPP link

Summary of content (13 pages)

PAGE 1
Application Note Demonstrating the Serial Port Profile (SPP) Between BTW 2002/6/29 1. Introduction As a technology leader in the wireless networking market, WIDCOMM’s vision is to enable consumers to easily, conveniently and securely access information and services from their Bluetooth devices anytime and anywhere – from homes, offices and public places. • BTW™ is a set of software drivers and utilities that seamlessly integrate Bluetooth technology into your desktop or laptop computer.
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8) Configure your Windows terminal emulator to use the VCOMM port that you uncovered in step 7. Configure the terminal emulator to echo local input to the screen (Local Echo ON). 9) Start the terminal emulator on the BTW system. 10) At this point you may chat freely back and forth. 11) When you are finished, terminate the applications (WidChat and your Windows terminal emulator). 12) Terminate the SPP link by shutting down your BlueConnect card on the Visor. 3.
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NOTE: It is important later in the process to use the View Details option. This setting will allow you to view the details of your SPP connection in the My Device display. 4.1.4 Configuring BTW to Act as an SPP Server No action is necessary on your part. A service entitled “Bluetooth Serial Port” will be automatically started on your Windows desktop or laptop computer. This service will handle all incoming requests which attempt to utilize the Serial Port Profile. 4.2 BLUECONNECT SETUP 4.2.
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.2.2 Configuring BlueConnect as an SPP Client SPP connectivity requires a remote device with a SPP server running the Bluetooth Serial Port Profile. The name of the SPP service running under BTW 1.2 is “Bluetooth Serial Port”. 1. Insert the BlueConnect module into your Visor. You should see the BlueConnect 3.0 welcome screen: 2. Tap the icon. 3. 4. Tap the icon. Make sure that Bluetooth is enabled. The devices displayed are drawn from the discovery database and may not be up-to-date.
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Follow the procedure shown below to do a fresh device inquiry. 5. Once device inquiry has completed, verify that the SPP server shows up in the device list, then tap on the device icon in order to perform a service discovery. Tap the Bluetooth Serial Port service in order to select it. NOTE: The SPP service name is configurable and may vary from device to device. 6. Tap on “Done” to confirm your selection. 7. Return to the application launch screen by tapping the “Home” silkscreen icon: 5.
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Tap the button. This should activate a menu bar across the top of your Visor screen. Tap on “Connection” followed by “Join Session.” WidChat will respond by confirming the device that you wish to connect to. Tap on Connect. There will be a delay of a few seconds while the unit attempts to connect with the service that is running on your BTW system. A tone will sound to announce that the connection has been established. NOTE: This screen and the accompanying Bluetooth connection will never time out.
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Examine the Status column under the Bluetooth Serial Port service. Notice that the service is started and that COM4 will be the VCOMM port that will be assigned to an incoming SPP connection. Once you have connected to the Bluetooth Serial Port service using BlueConnect, this display will change to the following: Once again, examine the Status column under the Bluetooth Serial Port service. Notice that the service is started and the COM4 is assigned to the Bluetooth connection.
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Once you reach this page, download the file called htpe63.zip. Inside the zip file, double-click on htpe6.exe in order to install the software.
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6.3 HYPERTERMINAL SETTINGS The first time that you run Hyperterminal, you will be prompted to create a new connection. In the following example, we will create a connection called BlueConnect. Enter the name and click on OK to continue. The next dialog will have a header entitled Connect To. Set the Connect using setting to use the COM port that you discovered in Section 6.1: 6.1Discovering the VCOMM Port. Click on OK to continue. The next dialog will have a header entitled “COM[X] Properties”.
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NOTE: The connection is still not properly set up at this point. Continue to finish the configuration. Use the File menu to set the properties of the current session using the method shown below: Click on the Settings tab followed by the ASCII Setup… button. Checkmark the Send line ends with line feeds and Echo types characters locally boxes as shown below.
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7. Chatting 7.1 WIDCHAT TO HYPERTERMINAL On the Visor, set your WidChat screen name by tapping in the Screen Name field and using the Palm OS text entry feature. Tap in the Chat field to set the text that you want to send to HyperTerminal. Tap the Send key to send your text to the opposing unit. WidChat may be terminated at any time by tapping the icon.
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in at the HyperTerminal window. on the WidChat and vice versa. Text that you enter onto the HyperTerminal screen will echo 8. Disconnect the Applications When you are finished chatting, disconnect both applications as shown below. 8.1 EXIT WIDCHAT You might think that the best way to terminate your Bluetooth connection is to return to the button. This is not true.
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• BlueConnect User’s Guide, WIDCOMM doc # BTP-PROJ-UM-010627-1723. • BlueConnect Development Kit Quick Start Guide, WIDCOMM doc # BTP-PROJ-UM010725-0623. • BTW Installation and Uninstallation Instructions. These are supplied with your BTW CD as readme.doc or readme.pdf. • BTW Windows 2000 Release Notes. • BTW Configuration and User’s Guide. If you still cannot succeed using the steps outlined in the document, contact WIDCOMM technical support.