© 2006 Nordic ID oy
RF651 User Manual
Version 1
June 2006
7
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1.3
Principles of Operation
The RF651 is a Hand Terminal equipped with a Bluetooth radio which allows connection with PC application software
through a USB Bluetooth adapter or Bluetooth Access Server. The USB Bluetooth adapter is packed in a Dongle which
is connected to any free USB port of the Host Computer (USB 1.1 or 2.0 compatible port). Bluetooth Access Servers are
connected to the Host Application using Local Area Network.
A Bluetooth connection will be established between the Hand Terminal and a USB Bluetooth adapter or an Access
Server. When the RF651 user sends data over the Bluetooth link, the USB adapter or the Access Server will pass the
data to the Host Application.
The user starts the transaction by using the Hand Terminal keyboard to make an entry, or by reading a barcode. The
Hand Terminal then sends this data to the Host Computer and waits for a message from the Host Application. If the Hand
Terminal does not receive a correct (check summed) message within the specified time-out period, it will resend the
original data as many times (retries) as it has been configured to do.
Note: When no entry is made on the Hand Terminal by the user, it will remain in a standby state and will not be able to
receive data from the Host Computer.
1.4
Operation of the Handheld Terminal
The RF651 Hand Terminal is designed to use application specific forms i.e. fields in the virtual display. This helps to make
the user interface of the Hand Terminal flexible and easy-to-use. The commands used to generate, modify, read and write
the forms are described in a document called
“RF-series system developer guide”.
When no forms are used, the initial screen of the Hand Terminal shows as a prompt a user writeable header and an input
field. This field can be filled with data from the keyboard or from the scanner. Any text sent by the Host Computer will
clear the screen and show the text that was sent to the Hand Terminal. Any user input (from the keyboard or the scanner)
will clear the text and the initial screen will be displayed again.
The user of the RF651 Hand Terminal activates the connection between the RF651 and the USB Bluetooth adapter or
the Access Server. Available Bluetooth devices can be searched from within the coverage area of the Hand Terminal
Bluetooth radio and the discovered Bluetooth devices answering the search can be saved onto a device list contained in
the memory of the Hand Terminal. The user can then proceed to create the actual connection with the selected device.
It is also possible to have the Hand Terminal wait for a connection from a Bluetooth USB Dongle. If a Bluetooth dongle
is used, it is recommended to use the Nordic ID PortRouter –software to managing and maintaining the connections to
the backend software.
Each Bluetooth device (USB Bluetooth adapter) has a unique Bluetooth Address (BT_ADDR) and a “Friendly Name”.
Usually the Host Computer name is used as the “Friendly Name”. When the Nordic ID RF651 Hand Terminal searches for
Bluetooth devices, the user will see a list which will display the “Friendly Name” of all discovered Bluetooth devices. The
user can select from the list, in which device the Hand Terminal is trying to connect.
Fig.
Device list screen on the RF651
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