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= FAQ =

== I can't receive Group Address messages ==

When trying to read a Group Address from bus, with '''{{{pknyx-group.py}}}''' utility, you may get nothing.

First, check that the used Group Address is correct, and there is a device configured to respond to a read request (use ETS for that).

Second, depending on your network topology, you may have a dummy switch which forbids multicast frame beeing sent on all ports. I got this nasty behaviour with my Netgear GS116E. By default, there is a so-called ''intelligent'' option which only send multicast frames on ports where a machine joined the corresponding multicast IP. But this does not work! Setting this option to off fixed the issue.

'''In fact, this is maybe an issue on pKNyX side! I have to investigate and make some tests...'''

== How can I generate log files? ==

In '''{{{pknyx-group.py}}}''', set the {{{config.LOGGER_BACKUP_COUNT}}} to a non zero value.

You can also adjust the log files size with {{{conf.LOGGER_MAX_BYTES}}} param.

== I have strange errors with My Gira router ==

Latest Gira router firmwares introduced a new feature called ''reliable KNX communication'', which are not (yet) part of the official KNX specifications.

To avoid errors in pKNyX, turn this option off.