Ariston Nuos Plus Wifi 250 - HA Integration

[joseh29]

Hi, I’m sorry if I’m not in the right Topic, but it’s the one it seems the most appropriate.
I’ve wanted to integrate my Ariston Nuos Plus Wifi 250 with my Home Assistant Server, but without success. I’ve seen users report that there are currently two approaches:

1. Connect an eBus adapter and control your boiler directly
2. Use the GitHub - fustom/ariston-remotethermo-home-assistant-v3: Ariston NET remotethermo integration for Home Assistant based on API

The second option seems to have died, since the api is not responding, so I would like to focus on the first option.

In the past I’ve opened my boiler front panel and saw that it’s using an Expressif ESP32-WROOM-32D and I’ve tried to connect it to my Network without success (through app and via LAN webserver). Checking my router logs it seems it connects and ~20s later it disconnects. I’ve tried a lot of things to fix it, from reseting to factory settings, memory reset, wifi reset, forcing a static ip (and disabling DHCP), turning off my 5ghz network, etc etc, without success .

I’m not sure how an eBus adapter works, but from the top of my mind I wouldn’t need one, since my boiler already has wifi (that is it already supports receive commands through wifi and sending them through eBus?). I’m not sure, since I’ve only recently started exploring with hardware.

I’m a bit lost atm, so I’m looking here to anyone that can have some clues to what I should proceed next.

Thanks

[joseh29]

Now that I think about it a little more, this would be the schematics for my boiler:

So if I would check the eBus connector it would not be connected to anything right? So I could just buy a eBus adapter and connect it and control it through there? But how would I then find out the available commands to send?

[wrongisthenwright]

The internal ESP module is probably used to “call home” to the Ariston Cloud.
The simplest way to integrate that boiler is via the eBus port.

Take a look at this thread:

Ariston Group integration via eBusd

Hi all, this is a post on how to integrate Home Assistant, via eBusd, to an Ariston Group (R) BusBridgenet (R) HVAC system, accessing the system bus via a custom/dedicated adapter, in READ and WRITE operations. You’ll be able read and change parameters as temperatures, modes etc. This post is not a comprehensive HOWTO, but a more general “instruction” on how to do it, as there are many different ways to tap into the bus and many configuration possible for HA (HASSIO, local setup, docker etc). …

The OP explains a little how to do it but in a few words you need:

• an ebus<->wifi/ethernet/serial adapter (I’d go for the “original” at https://adapter.ebusd.eu/v5-c6/index.en)
• a server running ebusd (it can run as HA addon)
• a custom config file

on that thread someone already posted a config file for the Nuos, see post

Ariston Group integration via eBusd

This is my csv file for the Ariston Nuos Split. The first block are values that are frequently broadcasted so I do not need to poll for them. The values in the second block are broadcasted infrequently therefore I poll them. the third block are values queried from the slave. The fourth block are broadcasted values to be ignored. The last lines are so I can query for incidental values and can send a command that is not foreseen in the csv. # type (r[1-9];w;u),circuit,name,[comment],[QQ],ZZ,PBSB,…

[joseh29]

Got you. What happens is probably the boiler connects to my router and then it exchanges http requests between himself and the ariston cloud servers. For some reason it’s not working, so my best bet would be to attach it an ebus adapter so I can make my own local connection. Correct?

[wrongisthenwright]

Yes, buy an adapter (it costs 30/40€ shipped) then connect it to your bolier (bus port) and to your wifi. Then set up ebusd to decode the bus messages.

For the built in wifi adapter try to connect it anyway, it gives you the ability to change the boiler settings via Ariston cloud infrastructure, as long as they’ll keep it alive it’s a nice thing to have.