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QL Plus Series User Guide
Wireless Communications with Bluetooth™
“Bluetooth” is a worldwide standard for the exchange of
data between two devices via radio frequencies. Bluetooth ra-
dios are relatively low powered to help prevent interference
with other devices running at similar radio frequencies. This
limits the range of a Bluetooth device to about 10 meters (32
feet). Both the printer and the device it communicates with
must follow the Bluetooth standard. Other than conditions
specified elsewhere in this manual, only one of the radio op-
tions can be installed in the printer at one time and the anten-
na used for these transmitters must not be co-located or must
not operate in conjunction with any other antenna.
Bluetooth Networking Overview
Each Bluetooth enabled QL Plus printer is identified by
a unique Bluetooth Device Address (BDA) loaded into its
QuickLink module when manufactured. In order to exchange
data, two Bluetooth enabled devices must establish a connec-
tion.
Bluetooth software is always running in the background,
ready to respond to connection requests. One device (known
as the master or the client) must request a connection with an-
other. The second device (the slave or the server) then accepts
or rejects the connection. A Bluetooth enabled QL Plus print-
er will normally act as a slave creating a miniature network
with the terminal sometimes referred to as a “piconet”.
For the most part, communications using the Bluetooth pro-
tocol are initiated and processed without any operator inter-
vention.
QL 220 Plus and 420 Plus printers can be equipped with
both a Bluetooth and an 802.11b radio, allowing communi-
cations with both Bluetooth enabled devices and a Wireless
Local Area Network (WLAN) (see WLAN discussion following).
continued