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Ah right. So let me supply a proper code fix back to Domoticz that deals with 0C and -ve temperatures. But atleast now, I have enough evidence that...

:/ I'm fetching the beta directly from github, so I'm not compiling locally :(

Your OT is returning the proper data. Could you please do this for me. Edit the file hardware/EvohomeRadio.cpp search for //SendTempSensor(27,...

Yup, sounds about right :)

OK, but is 14.84C about right in terms of outside temperature for you now? That's what the 0E D8 translates to.

Actual temp on the boiler is 14.5C

Just had a heating engineer visit. Very much looking like a pump, not fan related issue. They believe one of the main 22m supply/return pipes is...

Yup, everything is now properly reported. External Temperature reading seems to be quite off though. New value: 2021-03-01 14:41:40.977 Status:...

To me that seems odd. The fan is doing a different job and is not needed when the pump alone is on. Mine certainly isn’t. The fan is needed to...

The new code needs to first detect that you have an OTB in your system. That process can take a few minutes, but once it detects an OTB, it will...

Done for the upgrade to latest beta. Pending for the missing data, seems that the data is coming back online (but slower than every 5 mins) I've...

If you have access to the latest Domoticz Beta, could you please download and run that. Confirm that all your OT devices that had stopped updating...

I do :) Boiler is Perfinox 4100, is reporting the external temperature on the system itself. It should respond to regular OT request, as the...

Our pump is integral to the boiler, and the fan appears to be directly linked to the pump speed.

The problem with mine I think is the fan speed is directly related to the pump speed, and when the pump is on the fan is on! Got Ideal visiting today...

Mine does not fire up during an overrun, but that would defeat the object of the overrun, as you say, it should be off. My pump though is frequently...

It does have a serial com port on the front under the perspex cover. I think I might even have the cable for it that I got with it.

I don't think Honeywell actually allowed firmware upgrades on any of their heating systems.

The boiler should be completely off during a pump overrun. Unless your boiler is designed in a way that the fan is trying to also cool the boiler in...

Thanks for clarifying but should the boiler fan also keep running? I say this because when the boiler is just circulating water (setpoint below...

A 3B+ will happily run Domoticz. But do be aware that Raspberry Pis are notorious for chewing through the limited write-lifetime of SD cards. There's...

A 3B+, as a safe option in my ignorant state.

I forgot to ask; What kind of RPi did you get?

I used to use Domoticz on Synology for years. But then gave up and moved over to QNAP, for the Virtualisation Station. Now I run Domoticz in an...

That is quite clear evidence that the OTB is doing a lot more than is being instructed by Evohome.

Here are all the types of requests seen by my OTGW. You can see there are a bunch of them with a period of around 1m45s. The DHW ones are odd,...

Reliance on an Internet feed for temperature was always going to run into these sorts of issues, especially with the lag involved in the update...