User Manual
46
ZQ630 User Guide
Wireless Communications with Bluetooth
Bluetooth is a worldwide standard for the exchange of data
between two devices via radio frequencies. This form of point-
to-point communication does not require access points or other
infrastructure. Bluetooth radios 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). The default for the ZQ630
is Class 2, but the range can be set to Class 1 via a SGD
(bluetooth.power_class) to increase power. Both the printer
and the device it communicates with must follow the Bluetooth
standard.
Bluetooth Networking Overview
Each Bluetooth enabled ZQ630 printer is identied by a unique
Bluetooth Device Address (BDADDR). This address resembles a
MAC address whereby the rst three bytes are vendor, and the last
three bytes are device (e.g. 00:22:58:3C:B8:CB). This address is
labeled on the back of the printer via a barcode for ease of pairing.
(For the dual radio, the MAC address label only represents WiFi
MAC address. See page 49.) In order to exchange data, two
Bluetooth enabled devices must establish a connection. Bluetooth
software is always running in the background, ready to respond
to connection requests. One device (known as the client) must
request/initiate a connection with another. The second device (the
server) then accepts or rejects the connection. A Bluetooth enabled
ZQ6 printer will normally act as a slave creating a miniature network
with the terminal sometimes referred to as a “piconet”. Discovery
identies Bluetooth devices that are available for pairing whereby
the master device broadcasts a discovery request and devices
respond. If a device is not discoverable, the master cannot pair
unless in knows the BDADDR or has previously paired with the
device. If both devices support Bluetooth 2.1 or higher they will
use Security Level 4 Secure Simple Pairing (SSP), a mandatory
security architecture that features two (2) association models:
Numeric Comparison and Just Works (no user conrmation).