For measuring the boiler's in and out temperature, I use an ESP with DS18b20 sensors, tie-wrapped to pipes.
You can attach multiple sensors to 1 ESP.

https://espeasy.readthedocs.io/en/latest/Plugin/P004_DS18b20.html

I know, I have used ESP based temperature sensors quite a bit, but now moved to ...

Problem has been solved with an update in the plugin.
Plugin support is excellent!

It was there, but had a very strange value (over 100 degrees)...

So where does this device come from? Is it made up by the OTWG plugin?


Nice that your new device is working!
Return water temperature is one of the normal outputs of the OTGW. But since no data is given by your boiler, it remains zero.
RWT is not an output for every boiler.

Maybe your ...

OK, I am now the proud owner of a brand-new OTGW unit.
Works great, but I have a question about the "Return water temperature".
In Domoticz a temperature device shows up, with value 0 celsius, not a very likely value compared to tht Boiler water temperature of 33,1 celsius.
You'd expect something ...

waltervl wrote: Tuesday 03 February 2026 13:52

manjh wrote: Tuesday 03 February 2026 13:40

waltervl wrote: Tuesday 03 February 2026 13:25 In the Z4D webgui, do the new plugs show up as certified?

I can see them as "optimized". Is that what you mean?

Yes, that is what i meant.
Do you see for those new plugs also only one device widget mentioned in the Z4D webgui?

Yes!

waltervl wrote: Tuesday 03 February 2026 13:25 In the Z4D webgui, do the new plugs show up as certified?

I can see them as "optimized". Is that what you mean?

Just to make things clearer: the new plugs work fine as switch, only the three special measuring values are missing!

I have lots of ZIgbee smartplugs, they all come into ZigbeeForDomoticz with four functions, for instance:

SP19 AutoPower
SP19 electric
SP19 AutoPower kWh
SP19 Voltage

The names are what I gave them in Domoticz.
Functions are on/off, ctual power usage, voltage, and total kWh. The units show up as ...

Thanks, that webinterface is the one I was using.
Upgrading the ESP software sounds OK, except that I run the risk of an inoperable OTGW, which makes my heater go down. (Complex story, has to do with the combination of an Insmart remote monitoring tool with the Honeywell T6 thermostat, Known problem ...

I already tried re-booting several times over the past weeks.
But why would that work I can see many valid values coming into Domoticz from the same device. Connecting from the Windows OTMonitor does not yield anything. And yes, I did disconnect the Domoticz HW entry before trying that.


What ...

Use the OTMonitor to connect to your OTGW. Using that tool you can also update your otgw firmware.

https://otgw.tclcode.com/download.html (near the bottom of the page)

I installed the tool. When I connect to the OTGW, all I see is a message like this:
07:10:22.227794 SE
To make sure, I ...

Is there a simple way to find the firmware version?



Use the OTMonitor to connect to your OTGW. Using that tool you can also update your otgw firmware.

https://otgw.tclcode.com/download.html (near the bottom of the page)

I installed the tool. When I connect to the OTGW, all I see is a ...

My OTGW carries an ESP unit to communicate with the Domoticz server. When I log on and look at the log, I see: What does this mean?

What does Domoticz log say when a value is received?
From what version of Domoticz did you upgrade. The firmware of OTGW in newer Domoticz versions needs to be min 5.x
https://wiki.domoticz.com/Opentherm_Gateway_OTGW

Log doesn't say much:

2026-01-14 21:29:26.459 OTGW: Temp (Return Water ...

I moved from my old Domoticz/Raspberry installation to a new setup, and also installed OTGW.
It works, but for some strange reason I see odd values, for instance the "Return water temperature" is fixed on 0 degrees.
I can see in the devices tab that it is updated regularly, and I am quite sure the ...

Found this thread when searching the forum, not sure if it is the right one.

I have recently purchased a Honeywell T6 thermostat, and am trying to get it into Domoticz.
Followed the instructions and created an account, and received a confirmation which said to wait a few weeks.
I did wait (4 weeks ...

jannl wrote: Thursday 13 November 2025 11:55 I don't think this is a big issue, since my google home mini also connects to the bridge. And I think also via the homekit protocol, but not sure about that.

Doesn't that Google Home use internet as well?

Is there an overview somewhere showing which functionality TadoLocal offers?
In the screenshot it shows the different zones. I assume you can manually change temperatures.
But can you change the programming schedule? times/temperatures per day?

I am thinking about replacing my thermostat by a Honeywell, either a Lyric T6 or a Home Chronotherm Touch.
Looks like they will both do the job in my home, but which of the two is better when I want to link to Domoticz?

And, more generally, which of these is the better thermostat?