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.