QK-A026-plus Manual
V 1.0
17 of 22
2020
4.3. WiFi
– Standby/Disable
The WiFi module can be disabled by selecting ‘standby’ in the WiFi menu
4.4. Filtering
The A026+ features filtering of the input NMEA 0183, SeaTalk input, and output NMEA 0183 sentences.
Each data stream has a flexible filter that can be configured to pass or block specific sentences from
entering the multiplexer.
NMEA sentences can be passed or blocked, specified by input or output. This frees up bandwidth,
significantly reducing the possibility of data overflow which can result in the loss of data.
Black listed input data is filtered out and ignored by the A026+ multiplexer, while the remaining desired
data is then transmitted to the outputs. As default, all filter lists are empty so all messages are passed
through the filters. Filters can be set through the Configuration software.
Figure 15 Filter diagram
Filtering allows the A026+ to reduce the processing data load by disabling unneeded input sentences.
GPS receivers for example often transmit an abundance of sentences every second and can fill much of
the available bandwidth of an NMEA 0183 port at 4800bps. By filtering out any unnecessary data the
bandwidth is saved for other more crucial device data.
Most Chart plotters also have their own sentence filter, however many PC/mobile phone-based
applications do not. So, using the black list to filter un-necessary sentences can be helpful.
Filtering also removes potential conflict if two similar NMEA devices provide the same sentence type.
Users may choose to enable this data on one input only (filtering), and to transmit to the outputs.
Configuring filters
Each input port’s black list can block up to 8 sentence types. To filter
out an unwanted message types from a specific input, enter the
details in the corresponding ‘Black List’ in the Configuration software.
Simply, remove the ‘$’ or ‘!’ from the 5-digit NMEA talker and
sentence identifier and insert separated by commas. For example to
block ‘!AIVDM’ and ‘$GPAAM’ enter ‘AIVDM,GPAAM’. If blacklisting
SeaTalk data, use the corresponding NMEA message header. (See
SeaTalk section for a full list of converted messages).
Routing data away from chosen outputs
As a default, all input data (excluding any filtered data) is routed to all
outputs (NMEA 0183, NMEA 2000, WiFi and USB). Data can be
routed to limit the data flow to only certain output/s.
Simply un-tick the corresponding boxes in the Configuration
software.