Author Topic: Z-wave thermostat with external temp sensor?  (Read 482 times)

Offline tinman

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Z-wave thermostat with external temp sensor?
« on: August 24, 2017, 10:51:25 am »
I'm looking for a zwave thermostat that can be used with a single stage heat pump with oil backup AND has connections for an external temperature sensor. Honeywell has several zwave units but none seem to have the external temperature sensor connection. I currently have a 7-day programmable Honeywell thermostat that I like but I'd like to have zwave connectivity. Anyone know of such a unit?

Offline Don Phillips

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Re: Z-wave thermostat with external temp sensor?
« Reply #1 on: August 24, 2017, 09:34:06 pm »
Not sue I know what you are trying to accomplish but based on your question, here is my setup to give you some ideas.

I have a conventional gas heat/electric air with a CT101 thermostat and the Weatherunderground plug in with PLEG doing the heavy logic lifting. When outside is < 60, turn on heat, > 65 turn on cool. Setpoints are set to 68/75 for heat/cool for Home and Away, 65/72 for night, and 60/80 for Away. PLEG keeps the temperature of the house set year round relying on the outside temperature from weatherunderground.
Vera 3, UI7 1.7.947, CT101 t-stat, Everspring motion detector, GE/Jasco switch, Leviton outlet, AeonLabs door sensor, Insteon garage control, Blue Iris, Sricam SP011, iPhone locator, APCUPSD, VeraMate, VeraAlerts, PLEG, House Modes, Countdown Timer, DVR, Virtual & Multi Switch, Weather, Sys. Mon.

Offline kigmatzomat

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Re: Z-wave thermostat with external temp sensor?
« Reply #2 on: August 24, 2017, 11:02:51 pm »
I do something similar, but I have a monoprice motion/temp sensor on my covered porch to provide real-time local exterior temps.  Plus if either the exterior sensor or the weather plug in says it is <25F, my pipe heaters come on.

I have another sensor upstairs, with PLEG rules to adjust the HVAC targets using the downstairs thermostat temp sensor during the day and the bedroom temps upstairs  at night.  Floor/ceiling temp limits keep any part of the house from getting out of whack.  I get notifications if the house goes past those limits.

Offline tony-park

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Re: Z-wave thermostat with external temp sensor?
« Reply #3 on: September 04, 2017, 06:34:06 pm »
Netatmo have a weather station that can feed the vera with the current temps etc.

Maybe take a look at this?

Offline Sammy2

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Re: Z-wave thermostat with external temp sensor?
« Reply #4 on: October 27, 2017, 12:48:20 pm »
Not sue I know what you are trying to accomplish but based on your question, here is my setup to give you some ideas.

I have a conventional gas heat/electric air with a CT101 thermostat and the Weatherunderground plug in with PLEG doing the heavy logic lifting. When outside is < 60, turn on heat, > 65 turn on cool. Setpoints are set to 68/75 for heat/cool for Home and Away, 65/72 for night, and 60/80 for Away. PLEG keeps the temperature of the house set year round relying on the outside temperature from weatherunderground.

Care to share you PLEG logic and maybe take a look here and help with my question RE: Temp/Humid/PIR Sensor?

TIA
Thanks!

Offline Don Phillips

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Re: Z-wave thermostat with external temp sensor?
« Reply #5 on: October 27, 2017, 06:29:26 pm »
This is kinda old but I stopped dinking around with PLEG since summer since I got busy.
Vera 3, UI7 1.7.947, CT101 t-stat, Everspring motion detector, GE/Jasco switch, Leviton outlet, AeonLabs door sensor, Insteon garage control, Blue Iris, Sricam SP011, iPhone locator, APCUPSD, VeraMate, VeraAlerts, PLEG, House Modes, Countdown Timer, DVR, Virtual & Multi Switch, Weather, Sys. Mon.

Offline kigmatzomat

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Re: Z-wave thermostat with external temp sensor?
« Reply #6 on: October 27, 2017, 11:15:35 pm »
Care to share you PLEG logic

I have a 2 story house, with upstairs (bedroom=br and downstairs (ds). It wasn't uncommon for the downstairs to be frigid or the upstairs to be an oven.

I have 4 temp values for each, cold, cool, warm, hot.  Cold always turns on heat. Hot always turns on AC.  Cool and Warm are the preferred target values, but will avoid pushing another area to Cold/Hot. The time of day determines which are gets to be closest to Warm/Cool.  Bedtime means the upstairs gets precedence.

Triggers
Name   Description
tBr_cold    temperature goes below 65 degrees
Comments: bedroom+<65
tBr_Cool   temperature goes below 70 degrees
Comments: Bedroom+<70
tBr_hot temperature goes above 83 degrees
      Comments: bedroom+>83
tBR_warm    temperature goes above 77 degrees
      Commentsm+>77
tDS_Cold   Temperature goes below 67 degrees
Comments: thermostat+<67
tDs_cool   temperature goes below 68 degrees
Comments: thermostat+<+68
tDS_hot   Temperature goes above 80 degrees
Comments: thermostat+>80
tDS_warm   temperature goes above 76 degrees
Comments: thermostat+>76

Conditions- used as triggers for scenes that change thermostat set point.
Name   Options   Logic Expression
cAC_on      ((sworkday and (tbr_hot or tds_hot or pBr_temp>83)) or (tbr_warm or tds_warm or pbr_temp >75))
Comments: lower+temp
cHeat_On      ( tBr_Cool and sNight) or tBr_cold or tDS_cold or (sWorkday and tDS_Cool)
Comments: somewhere+cool/cold
cHVAC_Normal      not (tBr_Cool or tBR_warm or tDs_cool or tDS_warm)

Offline Sammy2

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Re: Z-wave thermostat with external temp sensor?
« Reply #7 on: November 08, 2017, 12:22:04 pm »
Thanks guys. I'll be working on my PLEG temperature control soon and this helps a lot!