[OpenTRV-interest] Frankenvalve brainstorming

[Nigel Tolley]

If I had TRVs already, I'd be way ahead of currently, where I've got
two, and on one of those the valve is stuck!

There's 8 in total in my bit of the house, so 6 + 1 that need changed.
Probably another 20 through the rest of the building.

N

On 09/01/2015 22:34, Damon Hart-Davis wrote:
> Note that if you have TRV bases in place (of the right sort) no draindown is needed to replace the top part; they simply screw on and off without getting you anywhere near the water…
>
> Rgds
>
> Damon
>
>
>> On 9 Jan 2015, at 22:05, Nigel <EMAIL ADDRESS HIDDEN> wrote:
>>
>> I don't know about you, but the basic hardware at under £10 is a bargain. 
>>
>> The hardest part is going to be the fitting - doing every one of 30 odd radiators is going to make draining the system a good idea! Once fitted, software and outer hardware are a snap to fiddle with by comparison. 
>>
>> I can 3D print a new case if need be at small cost. I can swap the 'motherboard' or whatever quite easily. I can update firmware with no issue. But I really don't want to swap the valve hardware ever again. 
>>
>> Oh, while I think about it, any chance of a firmware update hardware switch of some form? Like press the button then you have 3 hours to push an update before it disables it forever - until you press the button again?
>>
>> That would give you time enough and avoid getting hacked.
>>
>> N
>>
>> Sent from mobile
>>
>>
>> -------- Original message --------
>> From: Tim Small <EMAIL ADDRESS HIDDEN>
>> Date:09/01/2015 19:42 (GMT+00:00)
>> To: "Open, non-developer list for interested parties" <EMAIL ADDRESS HIDDEN>
>> Cc:
>> Subject: Re: [OpenTRV-interest] Frankenvalve brainstorming
>>
>> On 09/01/15 17:13, Nigel wrote:
>>> The other option, to re map a different valve, would kind of cease
>>> this project, & would also mean being stuck with all their issues and
>>> design flaws. Plus of they add DRM or something it could turn out bad.
>>> Behind arrested for breaking the DMCA for your radiator valves would suck.
>> I'm really only considering this as a stop-gap until cheap OpenTRV
>> hardware is available, and any design changes from the manufacturer will
>> always cause problems when adapting 3rd party hardware (whether
>> replacing their electronics or not).  No DMCA in the UK AFAIK (and the
>> EU laws only prohibit circumvention for the purpose of copyright violation).
>>
>> They could lock down the firmware using signing etc. but that's going to
>> make their life more difficult...
>>
>> Until you have cost-effective hardware available, you limit (seriously)
>> your developer community.  Until you have a good sized developer
>> community it makes it difficult to make cost-effective hardware. 
>> Chicken-egg problem.
>>
>> There are other solutions to it of course, but it's worth considering IMO.
>>
>> Tim.
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