The current Unix / port 6720 client interface is somewhat undocumented, fragile, nonextensible, and the client shims are generated by undocumented somewhat-incomprehensible macros.

• write a new spec, probbly based on protobuf

• extend for server>server connections

Layer 7 features have been dropped from knxd 0.14 because (a) a router supports layers 1…3, possibly 4, but certainly not 7, (b) they've been written in a way that's fundamentally incompatible with event loops.

• extend the protocol with high-level features (device reset, programming mode, …)

• fork a layer-7 process if a client wants these features

• figure out how to test this

• physical addresses: time out if you don't see a device sending for however long

• 15.15.255 (the programming address) is special: don't cache for more than a second or so, because somebody might want to do bulk address assignment on multiple buses in parallel

• group addresses: ability to specify which buses get which group destinations

There's a rudimentary shell script for testing …

• "knxtool" has a bunch of features, all of which want testing

• There are multiple ways for more than one knxd to talk. Test them all.

• ipt: may or may not work (client as well as server)

• See specific page on this subject

• the list of open issues.