Honeywell Component doesn't seem to work

I’m wondering if the site which I use to manage 7 thermostats in our building isn’t compatible with

There seem to be two flavors of Honeywell thermostat. Any insight from anyone who has made one of the RTH8500 series WIFI thermostats work with HA?

The Honeywell integration does not work with the mytotalconnectcomfort website as far as I have figured. I currently use IFTTT to bridge the gap and it works…for now.