@briche : Hi Bob, I am not sure what you want to achieve, since my custom handler DOES display latest temperatures on the main tile, NOT the open/close state.
Any way, it is somewhat of a moot point, since thanks to SmartThings repeated efforts, I cannot use anymore either the Classic SmartThings mobile App, nor the new Samsung SmartThings App.
Once more, SmartThings has shown its total disregard for early adopters investments, breaking completely my 6 years old system, with thousands of $ and months of personal time investments.
You should consider yourself lucky yours still runs, probably because you are located in the States and the migration to the new Samsung SmartThings App worked well, when mine in France failed.
Furthermore, I am afraid to be the bringer of more bad news : AFAIU the SmartThings roadmap, they will abandon next year the Groovy language, which will definitively kill all custom Handlers.
I want to thank those who followed and helped me during those 6 years of SmartThings adventures, but it is time to find something else…
…which according to a wise man will likely be dead and need replacement within 4-5 years too, if it is cloud based too 
.
Those in need of perpetuating Internet temperature measurements and reportings should rather look at something like LoRa connections for the sensor (low power, low bandwidth, long distance connections), with an attached Internet bridge for SmartPhone reporting.
Anything based on a cloud unilaterally controlled by a third party will break as soon as this party finds to its benefit to break upward compatibility 
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