Same setup - openHAB, reflashed Cube (I presume or are you using a CUL?), 16 Max! valves, 7 thermostats, 23 devices in total in 14 rooms all controlled by Homegear. Although I do use openHAB and have all my valves and thermostats as items so I can see what’s going on and makes changes to temperatures or Manual / Auto in HABPanel, I also use Node Red (for most of my rule programming in openHAB anyway) and I use firstly JSONata (super-powerful once you get your head round it) and then MQTT (and openHAB’s broker) to go direct to Homegear to program schedules without going via openHAB. That’s the direction I’m heading as I add functionality and I may end up building a UI in Node Red rather than openHAB. I’d be interested to hear about your experiences with Max!, Homegear and openHAB.
You know you can get a version of the CUN firmware that has the 1% duty cycle limit removed and I believe also one that modifies it such that instead of blocking you for an hour and not allowing anything at all when you breach the limit, it recovers constantly so at least half an hour later you will have 1/2% to play with. If you’re brave enough / technically skilled enough you can also rebuild the CUL firmware with whatever limits you want in there (or none).
Now that might technically be illegal, I’m not sure on what the rules are about selling equipment that breaches the 1% limit vs building your own equipment that breaches it. Maybe the rules are there to stop vendors selling equipment to unsuspecting users that hog all the bandwidth. It also depends where you live, what other equipment you or your neighbours might have and how often you feel you need to break the limit. If you’re the only person using 868MHz and you only very occasionally need 1.5% in one hour to re-program all your valves but the rest of the time don’t use very much then you may feel quite comfortable ignoring the limits.
I did quite a bit of research on this when trying to reflash my Cube prompted by the Cube not being able to cope with all my rooms and devices. Since I’ve been running Homegear though everything is going brilliantly.
House warm only in the right places at the right times = reduced heating bills. More importantly, warm house = happy wife!