Advice on HVAC integration protocols - Modbus vs WMP, KNX, Bacnet

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Hi,

I am planning to integrate my Daikin ducted HVAC (VRV with 2 outdoor units, 9 indoor units, hot water box and radiant heating box) with Home Assistant using an Intesys gateway IN770AIR00SO000.

The Intesys gateway offers a choice of integration protocols, any of which could be made to work with Home Assistant:

  • WMP over IP, using this integration
  • Modbus over IP using the native Modbus integration
  • KNX via a KNX->IP Bridge, using the native KNX integration
  • BacNet (I must admit I have not explored this route properly)
    Does anyone have any experience of the tradeoffs with these different integrations in a similar scenario that might help inform my choice? I’d rather avoid installing a bridge if I can, so I lean toward the WMP/Modbus options, but if it’s worth the effort I can do KNX.

Thanks in advance!

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No hands-on experience with the mentioned HVAC, however unless the HACS integration had a very active development and active community, I would go with one of the official integrations.

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Thanks. It looks like the gateway exposes a lot more functionality over modbus and knx than WMP, so that would also point in the same direction…

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In case anyone is interested, I have decided to use modbus, because:

KNX seems to require proprietary software
BacNet seems pretty complicated and over the top for my needs
The WMP integration is missing some important controls (like DHW control for example).

I am going to try using the modbus2mqtt add-on to simplify data acquisition.

I won’t be able to organise the hardware installation for a while but will report back when I have some news…

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Oooh - Intesis have very recently added mqtt to their 700 series gateways, so I am going to try that in the first instance.

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Just released this

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Wow. Now I am spoilt for choice :joy:

I plan to test out some protocols when I get some free time and the end of the month. Will take a good look at this and MQTT - Bacnet looks to offer a fuller integration but it’s all new for me.

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Well in the end I tried MQTT first as I was most familiar with it. It took a lot of trial and error but I now have a full-featured AC integration with 11 indoor units, DHW, radiators and underfloor heating. Works flawlessly. The intesis 770 unit is excellent and a huge upgrade over the Daikin iTab controller system (which couldn’t even control hot water production and has no API or automation capability). Would recommend!