I’m looking also at a Mitshubishi Heavy Industries AC , model SRK25ZS.
Although there’s a Wifi adapter card that can be installed in it and would allow me to control the AC via some cloud based software, I prefer to have local control not depending on a cloud service.
@hmerk How much did you pay for the Intesis Wifi Adapter ?
Wich Intesis Wifi adapter are you using ? The AC Cloud or the Home Automation one with the ASCII protocol ?
Gree is not cloud dependant. I use them only locally.
(Stuart Hanlon, UK importer of Velbus hardware)
I would recommend a more commercial biased system that supports nice and easy controls, then link to a robust system like #Velbus that can offer you full integration with the rest of the building, as well as work extremely well with openHAB.
One of the biggest issues we see is people not doing the ground work that you are and ending up with domestic air con systems that insist on using their web based controls, which work with openHAB, but aren’t easily integrated with the rest of the building.
Try to find a condensing unit that supports simple contact closures and 10v controls, with room FCU that have similar controls.
Thank you for all the replies, so far! I didn’t want to limit models in the opening post, but what I’m really looking for is:
Local control, I’m not interested in anything that depends on the internet to work
Well defined and documented protocol (bacnet, modbus, velbus) and if possible fully open together with implementation. KNX is not an option as it uses encrypted database and forces buying ETS.
I’m OK with direct controls (4.20mA, 0-10V, VFC), but comms are preferred. Also I’d rather have a cable instead of a wifi connection.
Most likely I’ll need multi-split AC - I don’t want to have X separate outdoor units.
Light industrial models will be my preferred option due to modbus/bacnet comms build-in. I assume integrating them with openHAB should be doable (I’m learning to write binding at this moment). But looks like openHAB has good bindings for Daikin and finding a connectable Daikin model should be easy, so going for direct control might not be the easiest option. @MDAR Thanks for the link! I wasn’t looking at Trane yet.
Going for Mitsubishi Heavy Industries and the airconwithme/intesis WiFi adapter gives you full local control and is fully supported by openHAB as we have a binding for those adapters. They might be used in different brands as well, which makes them compatible too.
See my last post, I am running a multi split system.
The newer Daikin devices sold since 2020 contain a newer Wifi Adapter (e.g. BRP069C4x) which only connects to the Daikin Cloud and is no longer reachable locally. These devices are only controllable with the Daikin Onecta App.
This library allows to initially (hopefully once) retrieve tokens by using a proxy to login to the Daikin Cloud. After that these tokens can be used and refreshed to interact with teh devices.
The esp module is connected with the AC unit using a cn105 connector and that is used to power the esp unit + do a serial communication with the AC unit. ESP module is then connected via wifi. Again, I’m using the EspEasy firmware for my setup (since it includes the plugin out-of-the-box) and you can access and setup the ESP module via build in web interface (+ do OTA, …), but I guess other firmwares would do the trick too.