"correct" usage

[pbathuk]

Hey,
So i have been using this for a few weeks now and wanted to make sure I was using it correctly, as have noticed that occassionally it is not doing what I would expect - i.e. the temperature in an area is below the desired temperature, but the heating has not kicked in.

To provide some information:
I have 11 Sonoff TRVZB's, all with dedicated thermostats (most are the sonff ones, but some - for areas where I care less about the exact temperature, I have my old aqara temp / humidity sensors).
All are on the latest zigbee2mqtt and are on the latest firmware (as know new features were added at different points)

For the temperature sensors I have the reporting set to update at 0.1C rather than the default of 1C.

I then have a central zigbee dry relay (aqara T2 relay), which is connected to my gas combi boiler to turn on or off (no openthem).

I have setup the central one (sorry I am unsure how to extract the YAML version of my setup), and have a question about a few things:

My understanding is that the 0.1 to 0.8 will ensure that the TPI will only active if the heating is within those ranges, so if I set the heating to 21, then TPI will kick in at 21.1 (or is it 20.9?) and then turn off if it ever went about 21.8 - I.e. heating off.
Is this right? so it will keep it more stable around the 21 + range?

And then on the TRV's I have set them up as control over climate with the key pages (I believe) being:

My question is, because I have Sonoff TRVZBs is the regulation threshold 3% as I am understanding it, even though its a over_climate setup, as when I look through the documents I see that it is setup as 0.05 on the same sonoff setup, so is the line 3% for Sonoff TRVZB (else the Sonoff TRVZB can lost its calibration). on the https://github.com/jmcollin78/versatile_thermostat/blob/main/documentation/en/over-climate.md indicating, linked to the image above it, that 0.05 is actually 5%, so coding way of showing a percentage?

BTW just to add, I think the intergration is great, and overall I am really happy. waking up to just the parts of the house that are needed to be warm is great :)
I am just making sure that I have not missed something - what I will say about the instance I did not see the kitchen turn on when I had that set as 20.5c and the current temp was 20.1c was that I had just restarted HA.. so wonder if my 5 minutes minimum activation is linked to this perhaps? For all of them I have:

The only difference on all of this setup is that for the kitchen I have :

As I was finding that such a big room and the radiator we have, plus alot of glass at the back of the room, the normal settings were not working, so I upped the coaf_int for that room (might have gone too far with 0.9 😄 ) and reduced a few things to try to get it pumping more heat into that area.

[jmcollin78]

Hello, one short answer:

If you use TPI threshold you will degrade the regulation. If you want something stable around the target setpoint, keep it to 0.

My understanding is that the 0.1 to 0.8 will ensure that the TPI will only active if the heating is within those ranges, so if I set the heating to 21, then TPI will kick in at 21.1 (or is it 20.9?) and then turn off if it ever went about 21.8 - I.e. heating off.
Is this right? so it will keep it more stable around the 21 + range?

21.1 if you set it to 0.1. You can set negative value liek -0.1 to have something between 20.9 and 21.1. But once again, just tune correctly your coef_int and coef_ext and you will have the best stability.

Threshold are here to avoid too much changes on the device and is more efficient for very low latency device like pellet stove or heatin floor.

You have TPI tuning advices here: https://github.com/jmcollin78/versatile_thermostat/blob/main/documentation/en/algorithms.md#principle

In your case, try to augment the coef_ext (target temp not reached)

[pbathuk]

Brilliant, thanks for the quick reply on that part. I have set these to 0 (high and low priority thresholds) and have just left the kitchen coef_int higher than the normal.

Thanks

[pbathuk]

Just to confirm, as removing the TPI thresholds, if, for the regulation threshold of 3% mentioned in the documents should be reflected as :
3
Or
0.03?

As I see alot of people with 0.05 or around there. And so don't want to be setting it as 300% by accidentally

[jmcollin78]

Give me a screen copy of what you are talking about. And read the help text just below the attribute you are trying to fill

[pbathuk]

So it is the 3 here:

But when I compare it to the help page :
https://github.com/jmcollin78/versatile_thermostat/blob/main/documentation/en/over-climate.md

But on that page, a little furhter down it says:

So my question is, as the screenshot on the help shows 0.05... is that actually 5%, as the docs below it clearly say should not fall below 3%. Or is that incorrect and putting 3 as I have done, actually 3% and the screenshot on the help docs are wrong?

[jmcollin78]

For valve (this is your case, because you have TRVZB), you should set in %. Here is my configuration:

Where do you find this screen copy ? I can find it in the documentation.

[pbathuk]

Great, I thought so, but the https://github.com/jmcollin78/versatile_thermostat/blob/main/documentation/en/over-climate.md#configuration was confusing me, as clearly shows a sonoff trv with 0.05, but under it is says to have >= 3%.

You have answered my questions, thank you. Maybe I am looking at the wrong page above, but that is where the over_climate took me, which I believe is what I am doing 😄