RADIO COMMUNICATIONS 4 - 25
Pairing Bar Code Format
When the linear imager scanner is configured as an SPP Master, you must create a pairing bar code for the
remote Bluetooth device to which the linear imager scanner can connect. The Bluetooth address of the remote
device must be known. Pairing bar codes are Code 128 bar codes and are formatted as follows:
<Fnc 3>Bxxxxxxxxxxxx
where:
•
B (or LNKB) is the prefix
•
xxxxxxxxxxxx represents the 12-character Bluetooth address.
Pairing Bar Code Example
If the remote device to which the linear imager scanner can connect has a Bluetooth address of
11:22:33:44:55:66, then the pairing bar code is:
Connection Maintenance Interval
Parameter # 5002
When a linear imager scanner disconnects from a cradle due to a Link Supervision Timeout, the linear imager
scanner immediately attempts to reconnect to the cradle for 30 seconds. If the auto-reconnect process fails, it
can be restarted by pulling the linear imager scanner trigger.
To guarantee that a disconnected linear imager scanner can reconnect when it comes back in range, the
cradle reserves the connection for that linear imager scanner for a period of time defined by the Connection
Maintenance Interval. If the cradle is supporting the maximum three linear imager scanners and one linear
imager scanner disconnects, a fourth linear imager scanner cannot pair to the cradle during this interval. To
connect another linear imager scanner: either wait until the connection maintenance interval expires then scan
the PAIR bar code on the cradle with the new linear imager scanner; or, scan Lock Override (page 4-24) with
the new linear imager scanner then scan the PAIR bar code on the cradle.
Considerations
The system administrator determines the Connection Maintenance Interval. A shorter interval allows new
users to gain access to abandoned connections more quickly, but causes problems if users leave the work
area for extended periods. A longer interval allows existing users to leave the work area for longer periods of
time, but ties up the system for new users.
To avoid this conflict, users who are going off-shift can scan the unpair bar code on page 4-24 to ignore the
Connection Maintenance Interval and make the connection immediately available.
Paring Bar Code Content:
‘B’ + Bluetooth Address
B112233445566
NOTE The Connection Maintenance Interval only applies in locked pairing mode (see page 4-23).
NOTE When the CR0078-S cradle supports the maximum three linear imager scanners and the CR0078-P
supports the maximum seven linear imager scanners, it stores the remote pairing address of each linear
imager scanner in memory regardless of the linear imager scanner condition (e.g., discharged battery).
When you want to change the linear imager scanners paired to the cradle, unpair each linear imager
scanner currently connected to the cradle by scanning the Unpairing bar code prior and reconnect each
appropriate linear imager scanner by scanning the PAIR bar code on the cradle.
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