Wich actuator for underfloor heating?

Hardware
1

Hi to all friends of the fantastic HomeAssistant,

i started to build me a smart controlling of my underfloor water heating.
First steps have been doing some temperatur-sensors with ESP-Home 8266 and generic thermostat wich is working fine.

But i do not find any solution for my standard water-valves M30x1,5. I do not want to use the electro-thermo actuators cause i live with an Iland-System (i produce my own electricity to drive my house)

Best would be motorized actuators wich can be controlled by value, e.g. 0 to 100 % or an 8Bit word.
Like radiator thermostats but without their temperatur-controlling.

Any suggestions please or is there such a projekt already ?

regards, Bert

2

This?

https://www.amazon.de/dp/B07RJZ57D7

With this?

https://www.amazon.de/dp/B07RJZ5F1Y

I have no experience with it. But I read a lot of positive reactions and there is an integration available it seems.

3

Hi ‘Sender’,

thank you for your fast reply !
I studied this now and it is unfortunatly not a solution for me, please note:

  • it is expensive. For my 16 heating circles in 3 floors it costs minimum 1300.- € not included shipping, ev. hub or ecu …

  • then i have a single UFH-contolling by room-temperature sensors only.

  • with HA then i have only access to that temperature values, only indirect access to the Homematic-system.

As i think this is not enough for a good UFH - controlling. Better i have direct access to the actuators.
And you found in documentation of the Homematic-actuator for 15.- €: it is only the motor with gear, no other sensors …

I opened a standard radiator-actuator for 8.- €, there you have additionaly rotary sensor, H-Bridge for the motor, you could use the temp-sensor for mesuring the water - temperature comming back from the circuit …

I want to have the UFH - controlling in my own hands and this is the big advantage of HomeAssistant, isn’t it ?

4

Hi to all Underfloor - Heaters,

is there nobody with proportional controlled valves ?
no people with actuators controlled by values ?

So i have to make some by myself, i think will do it with one AtMega per valve.

Is there any example for ESP-Home having Serial Output/Input (similar RS232 with 3.3V only) ?

Cheers, Bert

5

I think you being Dagobert, this should not be an issue?

And I think your question is too generic. You are asking almost for a “complete” solution home-made floor heating controller which is not there as far as I know. If you have any specific question on how to connect “things” to an ESP and how to configure with ESPHome there is enough help on this forum to get you further.

6

Hi ‘Sender’,

Dagobert is also stingy ;-))

You have shown me a complete solution floor heating, but i am not stupid, i do not pay over 1300.- for a ‘bad’ one.
Control engineering is part of my profession and i can understand/judge that.

Like most all other people i search for a ready made actuator (cause my livetime is limited ;-)) and if there is none i look for an example or ideas how to make one.

My specific question here was already, how to connect another item to ESP by serial comunication and i have done surching at ESP-home without success till now, thats why i asked.

And for all others who are interested in my theme of UFH-actuators:
have found now in DIY-examples (it was the last in the list ;-))
“ESPHome floor heating controller (proportional valves) by @nliaudat”

Will continue reading there.

Cheers