[OpenTRV-interest] Programmable TRV performance

[Damon Hart-Davis]

REV7 is the rad valve and REV8 is the boiler end.

The tech should be mature enough (and you will be able to upgrade the software if you want to), but we may not have committed to a substantial production run by July; the plastics process is complicated and expensive (>£50k for full production moulds, etc).

Boiler control will still be on-off by default.  Most boilers should be clever enough to modulate themselves by observing return/flow times.

I do not expect to have better than alpha-standard Internet access this year since there is a fair chunk of important security stuff to get right first and that takes time.  Yes, RPi is very likely part of the story in one form or another.

Does that help

Rgds

Damon


> On 19 Feb 2015, at 14:34, Geert Steyaert <EMAIL ADDRESS HIDDEN> wrote:
> 
> Is that the Rev7 board work which is in progress now? What's the status on the adaptations of the Conrad valves towards the new radios? 
> 
> I'll be installing a brand new modulating & condensing gasboiler, with thermostatic valves in my new house, once I have the keys, being earliest July.
> 
> Will the Rev7 (or higher at that time) system be mature enough at that time, say July/August timeframe, to properly support the complete install? Taking into account the new radios, HW adaptations at the valves, efficient modulating control of the boiler?
> Is some kind of internet control in the plan for this year? I don't mind having a RPi (or similar) partly dedicated for this if need be.
> 
> Or, should I better wait till somewhere Oct/Nov to look again at progress/status of this project to buy the kits? Since in the summer is not that urgent to install a very efficient heating system anyway ...
> 
> Thanks,
> Geert
> 
> On Mon, Feb 16, 2015 at 6:32 PM, Damon Hart-Davis <EMAIL ADDRESS HIDDEN> wrote:
> Note that, FWIW, an RFM12B is not capable of the OOK (On-Off Keying) that we happen to currently use, ie to talk to the Conrad valve.
> 
> We are using the RFM23B, and sometime real soon now will move to the RFM69CW, though put that off a bit by buy nearly 400 of the 23Bs!
> 
> Rgds
> 
> Damon
> 
> 
> > On 16 Feb 2015, at 17:27, Tim Small <EMAIL ADDRESS HIDDEN> wrote:
> >
> > On 16/02/15 17:16, Mark Wigmore wrote:
> >> Is the split configuration available as a kit or even assembled?
> >
> > FWIW, others have retrofitted a RFM12b radio to the HR-20, and also
> > re-written to the firmware from scratch, this suggests it also works
> > with the HR-25 hardware:
> >
> > https://piontecsmumble.wordpress.com/2013/02/25/openhr-20-tutorial-part-0-introduction/
> >
> > No one has got this working with OpenTRV yet, but it sounds feasible I
> > think.
> >
> > Tim.
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