Beiträge von alexvs

Zitat von realbudhead

I wasn't aware of this functionality when I wrote my post, but it defently works fine. Already tested.

When you disable automatic temperature control, the valve can be set in any position.

Thanks for checking!

So in a nutshell one has to do the following thorugh API:

1. set "/settings/thermostats/0/target_t.enabled" to FALSE (disable automatic valve control / "manual override")

2. set "/thermostats/0/pos" to desired position

3. set "/settings/thermostats/0/target_t.enabled" to TRUE (enable automatic valve control / return to the state before the "manual override")

right?

If you have a TRV around, could you please help me by checking if the MQTT topics allow the same?

(I haven't ordered any TRV yet, as I first want to check if the valve can be manually controlled through MQTT / HomeAssistant).

Zitat von ploppythekangaroo

Agree.

Although you could just set the valve to 0% or 100%

In those (and I can imagine most...) of the cases, yes, one could do just that.

Zitat von thgoebel

Exactly! It would be brilliant to set the appropriate link to the lexicon schematic…

As I am new here, I am not sure what you mean... the link to the schematic is already in your earlier message. My intention was to link the thread/message containing the script itself, not the schematic.

Is there any built-in function for preventing the valve from becoming stuck/calcified/etc. (in reality this happens more often than not)? E.g. fully closing and opening the valve periodically/on a schedule (e.g. not during the night, in order to not disturb people that are sleeping etc.)?

In order to prevent the valve from becoming stuck, other TRVs on the market have a built-in feature for fully opening and closing the valve once/a couple of times on a regular basis, independent of any active heating mode/schedule (after completing the open-close cycle, the valve returns to the position/mode/schedule in which it was before starting the cycle).

According to the API documentation (link), one can get the position of the valve (/thermostats/0, "pos" attribute).

How can one directly SET the position of the valve (e.g. fully open or fully close)?

Such a feature is needed for situations when particular valve positions (at least fully open and fully closed) are required regardless of the target and measured temperatures, for example:

- when bleeding the radiators (the valve must be fully open)

- if a pipe/radiator has to be replaced/repaired, or any other related activity (the valve must be fully closed)

- when performing complete valve open-close cycles, in order to prevent it from becoming stuck/calcified/etc.

Zitat von thgoebel

[..] But there is an adequate solution to be found in “Lexicon”: With only one button switch you may control two lamps with long and short push! This seems to me a bit more comfortable as with the Finder series switching, but will need some adaptation in handling.

Addendum: Link to the “Lexicon”: Click!

Thanks for the pointer, I guess that you are referring to this, right?

Thema

Beide Ausgänge per "Scripts" über einen Eingang schalten

Die Anfrage des Users Marcos M in diesem Beitrag, hat mich veranlasst dieses als kleine Anleitung für andere User mit ähnlichem Problem zu erstellen. Ein besonderer Dank gilt Seven of Nine für die Erstellung und Freigabe des Skriptes! Danke!

Durch die heutigen technischen Möglichkeiten wird man oft verleitet z.B. Beleuchtungen im eigenen Zuhause zu schaffen oder zu erweitern, in dem eigentlich die elektrotechnischen Voraussetzungen nicht vorhanden sind, oft ist es nur eine fehlende Ader…

SparkyMaster

30. Dezember 2021 um 20:23

I am searching for a (preferably Shelly-based, as I do use many Shelly products) solution for replacing some 220V DIN rail-mounted 2-pole / double phase step relays (e.g.Finder Type 20.26) for lighting control.

The current functionality is:

relay output 1 OFF, output 2 OFF -> light switch pressed -> relay output 1 ON, output 2 OFF -> light switch pressed -> relay output 1 ON, output 2 ON -> light switch pressed -> relay output 1 OFF, output 2 OFF

(the relays are controlled with single-pole push-button/momentary switches)

Can the Shelly PRO 2 operate in this manner? (I remember reading somewhere that the Shelly 2.5 could operate in a similar manner)