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Thank you very much for your help, it works.

Now I see more clear how to use dbus-send, at the beginning I have found a bit confusing the documentation.

Hi, first of all I am not very familiar to DBUS. Right now I have a daemon ot-monitor running in a raspberry-pi. The process is sending signals to the "system bus", in fact I can check it via "dbus-monitor --system", so the guy is running good in that sense. Now I want to command...

Your questions suggest you have not yet found the opentherm protocol specifications. Google for it. Then you'll have the same information most of us have to go by. Completely agree, sorry for this inconvenience. I was reading in more detail the document posted in this forum but I have to say it is ...

Hello Hailsham, it seems that you are pretty familiar with some terminology here. In particular I am talking about "modulation level", what does exactly mean? Going into the protocol document does not help at all, here is the "best definition" I have found there (related with the...

Thanks a lot for your time trying to clarify this doubt. To be honest, I find this protocol a little bit with nonsense sometimes, specially when I am reading the .pdf posted in the web I have found that many things have not been defined properly or not defined at all. Maybe there exist another addit...

Thanks for the explanation. I have checked that indeed when I am using the hot water from the tap, the "domestic hot water is on". I do not understand what is the "flame" indicating then. Sometimes I have the "central heating system on" but the flame is not on. Does it ...

Hi, I recently to start using the OTG quite successfully and now I am looking at the system in more detail. In particular I would like to know what are the central heating and domestic central water modes. I see that both are enabled in the status so I can choose both modes, but I do not know what t...

I guess my question fits in this post.
What does "relative modulation level" mean?

This is a really nice explanation!

It is been a long time I do not deal with analog electronics, thanks a lot, I have understood it pretty well.

Hello, I am new in the forum and recently I have purchased an opentherm gateway. Looking briefly at the communication protocol and at the design http://otgw.tclcode.com/schematic.html#schematic , I would like to know how the analog circuits for the master and the slave actually work since there is n...