Thanks @johnconstantelo for all you that have done for the Smartthings community. I have been using several of your device handlers and I really enjoy them. I recently installed a Honeywell z-wave thermostat RTH8580ZW1001 which Smartthings does not recognize as a Honeywell and added it as a generic Z-wave thermostat. I switched to your handler for the TH8320ZW which is tremendously better. I would like to ask if it is possible to add the “Permanent HOLD” feature? While I could remotely change the temperature set point, but when the thermostat moves to the next programmed slot, it will automatically change to the temperature programmed for that slot. It would be very useful to be able to permanently hold a temperature remotely as I could do on the unit itself.
First, thanks for those comments, I appreciate that!
Unfortunately that’s not supported by the thermostat via zwave commands. Page 12 and 13 describe what the thermo can do:
The only workaround would be to always keep the thermo in “hold”, and then to use a SmartApp to control programming. Here’s a link to a discussion on one that works really well:
Thanks @johnconstantelo for the reply. I guess I shouldn’t need to program the thermostat when I could have Smartthings control it all together. I finally realized that the Smartthings hub could provide all the programmable capabilities of the thermostat and more. I setup a few automation routines to turn the heat on/off based on mode and arrival/departure and it’s working great. Since I have two heating zones, I installed two z-wave thermostats. I only wish Smartthings would update the software to allow independent temperature settings for each thermostat. For example, in the “Good Night!” routine, it allowed me to select and set both thermostats, but only allowed one temp setting to be applied to both thermostats. Unless I add another routine, I cannot set the upstairs temp to 65 and the downstairs to 58. I should send a comment to Smartthings support and see if they are receptive to improving on the next update.
Yeah, I completely agree. Because of how many devices and rooms I have in my environment, I ended up creating two Routines, but I would have preferred to keep it simple and have just 1.
Looks like this got Hi-Jacked.
I poached the Following Solution from another forum https://forums.homeseer.com/forum/thermostat-hvac-plug-ins/thermostat-hvac-discussion/97075-honeywell-z-wave-th8320zw-won-t-connect-to-z-wave-solved
and it solved my problem with Getting the Thermostat to Connect to SmartThings.
"Honeywell Z-wave TH8320ZW won’t connect to Z-wave - Solved!
August 23rd, 2016, 09:00 AM
I hope this helps others out there-- hopefully you won’t waste a couple of hours trying to figure out what is wrong with your device.
I bought a Honeywell TH8320ZW thermostat to work with my Samsung SmartThings hub. After getting it turned on, the top of the screen would almost instantly say “Communication failed”. I would try to add it to the Z-wave network (just like it says in the manual) and it would do one of two things: 1) say “Adding to Network” but it would never do anything for a few minutes, or 2) almost instantly say “Action Failed”.
The problem is this: the Z-wave component of the circuit board is not properly connected to the main circuit board. The two are connected by four thin pins, and the housing is spacious enough that they easily become disconnected. To reconnect them, open the housing by peeling off the front housing (the one around the touchscreen), it should snap off, and this will expose the screen casing. There are two tabs on the sides of it to push back, then the whole thing can come loose. You can remove the main circuitboard now, and then you’ll see the Z-wave board just underneath (still in the housing). Try to now push them back together (being very careful to align it properly). You can put the thermostat back on the wall without the front casing on, and try to set it up again and see if it will connect to your Z-wave hub now. This did the trick for me.
Hope this helps someone!"