Instantaneous water heater?

[mhgue (M.H.Günzl)]

Since several years there have been questions about integration of instantaneous water heaters e.g.:

Does anymone know an "instantaneous water heater", that can be controlled via Home Assistant?

Hi @klacol I tried to install your plugin, while setting all this information, I can not have it working, I tried you python code and it give me this Traceback (most recent call last): File "config/test.py", line 9, in <module> parsed = json.load( clageHomeServer.requestStatus() ) File "/usr/local/lib/python3.9/dist-packages/clage_homeserver/clage_homeserver.py", line 398, in requestStatus response = ClageHomeServerMapper().mapApiStatusResponse(status) File "/usr/local/lib/python…

Recommendation for a HA-compatible electric water heater (DE/Europe)

Hey all. I’m at the point of an apartment renovation where I have to choose a tankless water heater to install. I’d of course like to get something that is compatible with HA! Does anyone have a recommendation for a tankless electric water heater that can be monitored and have things like temperature controlled via either a direct HA integration, or a diagnostic port via ESPhome? Local-first preferred over cloud. Any advice graetfully received!

Looking into Github today, one can find interface descriptions for a REST-API and a Modbus RTU interface of two devices from CLAGE:

Home

Home

There is one device with WLAN and a REST-API and another with Modbus RTU additionally. So in theory there should be two ways to integrate in HA:

1. WLAN connection and using REST-API
2. Connect Modbus RTU to a Modbus gateway and integrate the device by Modbus TCP.

I have one of these devices (ISX) and successfully tried the latter, using a Waveshare RS485 gateway and YAML provided with some patches.

So my question is: Does anybody in the meantime has any alternative way to integrate an instant water heater (preferably my ISX) in HA?

PS I would prefer a cloudless option.

[Karosm]

Modbus RTU through Esphome devboard.