Honeywell T6 Pro temperature reporting oddities

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21

Just to provide a little more data.

The device had done the same thing the day prior, Below are the logs just prior to the temperature ramp up logs I posted prior.

At 10:48:04AM I clicked Refresh, because Hubitat was reporting 69.5F on the device configuration page and the same on a dashboard that I have, but the actual face of the device was displaying 67F. You can see that it then z-wave reported out the temperature of 67F, when it hadn't z-wave reported since 69.5F 1:35 prior.

So even though the last z-wave report was 69.5F, the device itself knew it was at 67F because the Setpoint was at 68F, and the A/C was cycling on/off around 68F, and when I clicked refresh the device actually z-wave reported 67F.

So if all those facts are true, it is a mystery as to why it chose to not send the temperature report in this period when the temperature had clearly dropped below 69.5F, and the face of the device had again confirmed this..

Name	        Value	Unit		Source		Date	                       Time Since Last Temp Report
Setpoint	85	F		DEVICE		2020-05-27 10:59:00.861 AM 	
coolingSetpoint	85	F		DEVICE		2020-05-27 10:59:00.849 AM 	
OperatingState	cooling			DEVICE		2020-05-27 10:51:59.998 AM 	
temperature	67	F		DEVICE		2020-05-27 10:48:04.543 AM 	00:00:00
temperature	67	F		DEVICE		2020-05-27 10:48:04.327 AM 	01:35:12
OperatingState	idle			DEVICE		2020-05-27 10:43:39.667 AM 	
OperatingState	cooling			DEVICE		2020-05-27 10:34:20.015 AM 	
OperatingState	idle			DEVICE		2020-05-27 10:26:19.620 AM 	
OperatingState	cooling			DEVICE		2020-05-27 10:16:59.917 AM 	
OperatingState	idle			DEVICE		2020-05-27 10:08:59.632 AM 	
OperatingState	cooling			DEVICE		2020-05-27 09:58:59.963 AM 	
OperatingState	idle			DEVICE		2020-05-27 09:51:19.683 AM 	
OperatingState	cooling			DEVICE		2020-05-27 09:40:39.962 AM 	
OperatingState	idle			DEVICE		2020-05-27 09:33:19.712 AM 	
OperatingState	cooling			DEVICE		2020-05-27 09:22:21.463 AM 	
OperatingState	idle			DEVICE		2020-05-27 09:15:41.161 AM 	
temperature	69.5	F		DEVICE		2020-05-27 09:12:52.566 AM 	00:03:20
temperature	70.5	F		DEVICE		2020-05-27 09:09:32.582 AM 	01:13:20
OperatingState	cooling			DEVICE		2020-05-27 09:01:01.155 AM 	
Setpoint	68	F		DEVICE		2020-05-27 09:01:00.780 AM 	
coolingSetpoint	68	F		DEVICE		2020-05-27 09:01:00.739 AM 	
temperature	71.5	F		DEVICE		2020-05-27 07:56:12.561 AM 	01:27:20
temperature	70.5	F		DEVICE		2020-05-27 06:28:52.563 AM 	00:41:40
temperature	69.5	F		DEVICE		2020-05-27 05:47:12.579 AM 	00:13:20
temperature	68.5	F		DEVICE		2020-05-27 05:33:52.549 AM 	05:54:20
OperatingState	idle			DEVICE		2020-05-27 05:31:01.127 AM
22

Did everyone's issues with reported temps bouncing around get solved?

I'm curious what power mode (battery or 24V) @jerias.mitchell, @Automatican and @JohnRob 's thermostats were running on, since this may affect Z-Wave reporting. Also which of the several available drivers were in use at the time with these devices.

23

I have 24 volts on all my thermostats.

24

My Thermostat is also powered via 24V (not batteries) using bcopeland's driver. I'm currently using the Thermostat Controller app with a refresh set to 5 mins. That combined with the 0.5F setting seems to give a reasonable temperature reporting from the T6. However, I don't use the T6 temperature for anything other than data collection. I'm using external temp sensors with the Controller to drive the HVAC.

25

Food for thought....

I had an older Honeywell smart thermostat and somehow it received or though it received a temperature command that was way out of any desired setting I would make. I couldn't identify the culprit hardware (or software). What saved me from having this become a real issue was the "hard" temperature limit in the thermostat.

A good friend purchases a house some years ago. The inspectors came in and set the old machinal thermostat to the max to test the furnace. They forgot to reset it when leaving. When they got to the house some days later the laminate on the kitchen cabinets had started to peel off. These cabinets were 30 years old at the time and based on the other features of the kitchen were not cheap cabinets.

So I sleep better an night knowing there is a hard limit on any temperature setting.

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26

If I understand correctly you're using the Thermostat Controller app to schedule and control your HVAC - but is the T6 still your hardware interface to drive the HVAC control signal lines or some additional piece of hardware?

27

Correct. The Thermostat Controller is just an app that drives the real thermostat through the driver. It effectively does a bang-bang type of control by adjusting the setpoints to turn the thermostat on or off.

The T6 is still driving the HVAC system with min/max set in the T6 configs.

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