Re: [mh] Setpoints -- heating and cooling?

[Rick Bolen(gm) <ric...@gm...>]

You can leave the mercury tstat as is (set to say 55F degrees as a 
failsafe) and wire in relays parallel to the tstat's heat\cool circuits. 
Control the relays via 1-wire temp sensors and logic within MH.

One of the things I've been needing to do is to put a wider temperature 
"spread" on the activating circuit. Most of the tstats today have a 1F 
degree swing, which results in my system short cycling more than I would 
prefer.

Rick

On 02/03/2016 04:20 PM, kent S wrote:
> In my case the capabilities of the thermostat is zero (almost). My
> current thermostat is a 1960's round honeywell model with the mercury
> switch. I would like to keep it and build a "smart thermostat" around it
> in software. That is why I was suggesting replicating a lot of what
> current smart models can already do.
>
> I don't think what I want is actually possible, which is to leave the
> 'stat untouched and use a arduino or raspberry pi to read its settings,
> then do magic. That way if the pi or arduino break, relays can close and
> I am back to reliable and mechanical.
>
> Add in that I have a reluctance to distribute my "metadata", whether it
> be HVAC, lighting, or otherwise, and what I want will certainly be more
> complicated than what other people need that are willing to let others
> do some of the work for them. :)
>
> I just noticed the original question asked about time of year, which was
> the big part of my suggestion. my logic would be something like this
> (with minus points for style and consistency).
>
>
>
> if(summer && windows != open) {
>     if(outsidetemp == hot) {
>       cool_aggressively();
>       #this could be alternatively be coolsetting(setpoint -2)}
>     } elsif (cloudy) {
>        coolsetting($setpoint +5);
>     }
>   }
>
> if (winter && daytime && sunny) {
>    open_curtains();
>    if(freeze_your_eyballs_cold) {
>      heat_setting($setpoint +5);
>    } else {
>      heat_setting($setpoint);
>    }
> }
>
>
>
>
> On Tue, 2016-02-02 at 18:02 -0600, Dan Bemowski wrote:
>> Kent,
>>
>>
>> To some extent it does depend on the capabilities of the thermostat,
>> but only in that it needs to have heating and cooling capability and
>> the ability to change them and the set points.  The logic behind it is
>> what gives any of the thermostatsout there their features.  Putting
>> your own spin on that logic is what I find cool.  A number of years
>> ago I was part of a project called Open Source Automation, and one of
>> the things they were working on was occupancy sensing and doing things
>> like this based on knowing who was home and what their preferences
>> were.  The things you are talking about are easy compared to some of
>> the complexities of occupancy sensing.  I think moving things in that
>> direction is where things should move with MisterHouse.  Sure its
>> complex and hard, but there is a GREAT team of people behind the
>> software and in time it will get there.
>>
>>
>> Dan B
>>
>>
>> On Tue, 2016-02-02 at 16:48 -0600, kent S wrote:
>>> I'm not sure if this will even rise to the $.02 level, and I know it
>>> will add to complexity and make your job harder, but why hard code
>>> heat/cool? based on things like latitude, time of year, and outside
>>> temperature it should be possible to compute the right mode. The user
>>> sets 22° and the computer/thermostat takes over. If you add in
>>> modifiers, like "I like it a bit warmer in the winter" or "on cloudy
>>> days add 2°" or "in spring we have the windows open, so allow more
>>> slop", etc, then you would allow the user to set a temp, and maybe some
>>> preferences and voila!
>>>
>>> This does depend a bit on the capabilities of the thermostat and assumes
>>> the user has other sensors, but it seems to me to be worth saving room
>>> for, even if it is an FFA (future feature adapter)
>>>
>>> Note: I won't be buying a thermostat with only an internet API, so I
>>> won't be helpful for this particular model, but I am now thinking about
>>> how this could work in mh that would allow these features and the
>>> various "thermostat drivers" could access it.
>>> On Mon, 2016-02-01 at 23:34 -0600, Dan Bemowski wrote:
>>>>
>>>> Just to throw my 2 cents in here, I would say you could determine it
>>>> by checking what mode the thermostat is in.  If you base it off the
>>>> mode and the thermostat is in heat mode, then it would be a heating
>>>> set point, and vice versa for cooling mode.  Where it might get hairy
>>>> is in auto mode, but I would think that for auto you could base it on
>>>> the current temp.  If you are setting to 22 degrees and the current
>>>> temp is 27 degrees then make it a cooling set point.  Likewise if
>>>> setting to 22 and the temp is 18, then make it a heating set point.
>>>>   Outside of that you may have to figure out a way to tell siri that it
>>>> is specifically a heating or cooling set point.
>>>>
>>>>
>>>> Dan B.
>>>>
>>>>
>>>> On Mon, 2016-02-01 at 18:39 -0700, H Plato wrote:
>>>>>
>>>>> Further to Garry’s email, I’ve got the last Homebridge category ‘Thermostats’ roughly working. So ‘Siri, set the main thermostat to 22 degrees’ will trigger a MH action.
>>>>>
>>>>> Right now that action will trigger a subroutine in a common code module. Since I have a venstar and nest, I’ve managed to get those working. Should be straightforward to connect other thermostats.
>>>>>
>>>>> However, here’s my question. ‘Set the main thermostat to 22 degrees’ can mean either setting a heating or cooling setpoint. The nest has a ‘target temperature’ that should work, and for the venstars, I check if they are set to heating mode (then use a heat setpoint) or cooling / auto mode (then use a cool setpoint).
>>>>>
>>>>> The insteon thermostats have heating and cooling setpoint routines.
>>>>>
>>>>> Anyone have any suggestions or logic that might make sense? I thought maybe if it’s june - sept, then assume a cooling setpoint, however this only works for us northern latitude folks. This could be a config_param setting, but that seams cumbersome. Maybe based on outside temps, but what should the range be?
>>>>>
>>>>> Any ideas or suggestions?
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>
>
>
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