Why are TCC thermostats not supported? The Honeywell Home app allows me to import and control them.

The problem is Honeywell doesn’t let you authorize any thermostats that have been paired with the TCC app for third party control via the Honeywell Home API. Until Honeywell allows the authorization, TCC thermostats remain unsupported by this driver. There is a dedicated API for TCC thermostats but we have been unsuccessful so far in getting access. If you know someone from Honeywell/Resideo who can help, please don’t hesitate to reach out and get us connected.