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WRMnano User Manual page
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bus messages, and if decryption is enabled and correct key(s) is/are programmed, it
can decrypt wireless m-bus telegrams. The user can set separate key for each
activated device and if the data is encrypted, WRMnano would decrypt it. For now
there is no possibility to use one key automatically for all devices, but programming
same key for all meters with our software is easy to do and does not take much time.
In addition, WRMnano has special filter capabilities, when operates in automatic
mode. This means that user can limit automatic activation to meters of interests. This
is useful in many cases, because in most of the cases there are meters that do not
belong to network of interest, but anyway are read due to interference.
There are three different
FILTER
masks that can be activated:
filter meters by manufacturer identification - for instance
GIN
filter meter by serial number ID, using wildcards in serial number (eg.
1234FFFF
)
filter meters by medium measured - for instance activated only water and
heat meters
Each filter type has up to 8 different values that can be saved and used. This
means that if user decides to filter wireless m-bus meters by manufacturer, he can
'tell' WRMnano to activate automatically only "
GIN
", "
SON
" and "
BMT
" meters, for
instance. Same applies for medium and serial number mask. In many cases this can
save time when setting WRMnano on site.
WRMnano has internal clock, which can be set to real time. It is not energy
independent, so if m-bus power supply fails then new setting of RTC should be made.
As an option user can set WRMnano to add timestamp to each wireless meter
telegram. This timestamp then can be used to know when particular meter has been
read for last time. Timestamp is coded as standard m-bus telegram, data type F.
And last, WRMnano can provide RSSI data in manufacturer specific part of each
telegram, if programmed to do that.
