[OpenTRV-dev] Hatching product plans in my head for this coming winter...

[Bo Herrmannsen]

of course..... thermostat for the boiler and not the rads :-D

well unfiltered from the mind... a box with a a relay board to control the valve and in parallel a board that can fabricate the power needed to supply our board?

it could be one combined board, needs to have a kind of shell over it so you cant get access to it normalvise... kind of a box in a box.... next to this our board... then a lid on 


sounds total bonkers?



Den 21/03/2014 kl. 21.51 skrev Damon Hart-Davis:

> No wires other than the two to control the boiler.
> 
> Rgds
> 
> Damon
> 
> 
> On 21 Mar 2014, at 19:30, Bo Herrmannsen <EMAIL ADDRESS HIDDEN> wrote:
> 
>> hmm..
>> 
>> so, we have a box on the wall with 230V in and wires out for the valve?
>> 
>> and we want to put our stuff in direct replacement?
>> 
>> 
>> Den 21/03/2014 kl. 15.46 skrev Damon Hart-Davis:
>> 
>>> Given observations in a few houses now I just create the following JIRA story:
>>> 
>>> 	• TODO-211
>>> Make hub box direct physical replacement for 2-wire 230V mech thermostat
>>> 
>>> 
>>> 
>>> Build a box which will serve as a physical replacement for standard wall thermostat.
>>> 
>>> Assume no power socket likely to hand (often in a hall for example), so will ideally be parasitically powered from the sense voltage.
>>> 
>>> Probably little or no UI (maybe just the LED). Also, as may be floating at mains voltage extra care would be needed for any buttons etc.
>>> 
>>> 
>>> So the parasitic power shouldn’t be too hard (I’ve done something like it in the past) and it only needs ~100mW to keep a radio receiver running.
>>> 
>>> If we do have any UI on the hub, and it isn’t managing a local valve, maybe it could be modified to handle house-wide party/holiday mode buttons.
>>> 
>>> Also, conceivably, this could be knitted into dynamic demand type stuff to help the grid by turning off the boiler for a short while when the grid’s having a bad moment.
>>> 
>>> Rgds
>>> 
>>> Damon
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