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/lates ... 18b20.html

manjh wrote: Saturday 07 February 2026 8:43 return water temperature is not. The matrix shows X...

Was it there before you upgraded?

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 boiler ...

It runs ESPEasy, build 147.
Not sure what you mean by the Web interface.
1020965753 : Ser2N: serial buffer full!


Webinterface: open browser, enter <ESP-IP:80>.
You should see a webinterface.
That might provide some log (not sure on the old version).

If not, you can upgrade the firmware of ...

jslegers wrote: Tuesday 27 January 2026 21:14 My question is can you set the current water meter value in the plug-in?

If not possible in the plugin, you can use the meter-offset in the device

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 ...

jannl wrote: Friday 23 January 2026 22:35 Do you use docker? Because if you do, the latest dockers run bookworm.

No, I don't use docker for domoticz, but it is needed for zigbee2mqtt or homebridge.
I had to use the bookworm version of Docker, ChatGPT was very helpfull on that matter.

Thorgal789 wrote: Friday 23 January 2026 17:33 BTW you have updated the OS alone or Domoticz in same time ? (I m thinking at the SSL V3 support)

Bookworm already supports SSL3.
I have updated both at the same time, not because of any solutions, but bookworm is getting eol soon.

Do you use Python event scripts (not plugins) in your environment? As they are a known source of memory leak.


I only use lua, dzvents and shell-scripts


I can see a big improvement too on memory use, but according to date it was before Trixie (trixie was out the 01 october 2025 ...

I was constantly experiencing issues with increasing memory usage.
I seen this since the upgrade to Bookworm. Since running on Trixie (~2026-12), those problems have disappeared.

I don’t think this was an isolated issue because I run multiple Domoticz installations; below you can see the memory ...

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 also ...

manjh wrote: Wednesday 14 January 2026 21:32 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)

Great piece of software!

See my earlier post

Installed manually.
This topic can be closed.

Has this something to do with anti-ddos on this site?

Here's the output from the install:

sudo bash -c "$(curl -sSfL https://install.domoticz.com)"
:::
::: You are root.
::: Verifying free disk space...
:::
::: Checking apt-get for upgraded packages.... done!
:::
::: Your system is up to date ...

thanks. that was indeed a typo.

i switch the dummy switch(which uses the gpio command.
indeed the esp does not give any feedback but the dummy switch does.

i figur domoticz will check the status of the dummy switch right?


Correct, only the internal dummy switch is checked.
If for some reason ...

Another way to detect presence of iPhones is the use of Homebridge and shortcuts on the iphone.
This works better than scanning the wlan, because smartphones usually disconnect from wlan when idle.

On action:http://192.168.1.150/control?cmd=GPIO,5,1
Off action http://192.168.1.150/control?cmd=GPIO,50

this works and when clicking the switch in the gui the relay turns on and off

I think the off command should be: http://192.168.1.150/control?cmd=GPIO,5,0

Also, ".checkFirst()" is useless ...

remcok wrote: Wednesday 06 July 2022 1:20 I created a plugin for Domoticz for local readout of a GoodWe inverter via modbus over UDP.

Could you add throtteling function? Similar to this

On Github I made a suggestion on how to