KNX switch-control and group address syntax

Setup, Configuration and Use Beginners
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1

Right - I’m embarrassed to ask this question because I see it coming up so often (usually followed by a very patient answer by @Udo_Hartmann ) but for the life of me, I cannot seem to integrate it into my situation:

OpenHAB should own the state of the winter/summer switch:

Type switch-control : SummerMode "is Summer" [ ga="1/6/20" ]

Switch SummerMode "[MAP(summerenabled.map):%s] mode" (gPersistRestarts) ["Switch"] {channel="knx:device:heating-mode:SummerMode"}

My assumption is that since OpenHAB controls the state of SummerMode it will also respond to GroupValue_Read requests from the KNX bus. Correct?

I also setup my MDT heating controller to read the value of 1/6/20 but when testing in ETS5 I don’t see answers to read requests.

Would a mainGA that accepts read requests? I tried ga="<1/6/20" and I also tried ga="1/6/21+<1/6/20" and ga="1/6/21+<1/6/20" but I feel like I’m shooting in the dark… what’s the right way to have a group address that my heating actor can read that is only switched from within OpenHAB rules (no other KNX devices)?

2

Hello Simon,

in the item definition I’m missing the bridge. Not shure, if it’s really required but it’s in the examples and I’m using it as well.

Switch SummerMode “[MAP(summerenabled.map):%s] mode” (gPersistRestarts) [“Switch”] {channel=“knx:device:bridge:heating-mode:SummerMode”}

3

@JuSt thanks for the comment - I’m using the following format to enable to me spread out my knx things across multiple files and reference back to knx:ip:knxrouter defined in one place. For example:

Thing knx:device:ntp         "KNX Date/Time"          (knx:ip:knxrouter) {
        Type datetime-control      : knxdate    [ ga="11.001:1/3/11" ]
        Type datetime-control      : knxtime    [ ga="10.001:1/3/12" ]
}

My other knx things are definitely working so I don’t think that’s the problem.

4

Well, in theory, openHAB should answer to read requests when it’s a *.control channel, but to be honest, I’ve never seen an answer to a read request from knx bus either.

As your bridge seems to be a knx/IP Router, is filtereing switched off?

for *-control channels, the first GA is the one which is used to answer read requests, so whgen using

Type switch-control : SummerMode "is Summer" [ ga="1/6/20" ]

a read request to 1/6/20 should be answered by openHAB.