Yes, the Honeywell Lyric thermostat can be controlled using Apple HomeKit. If you wish to accomplish this you must make sure you have the 2nd generation Lyric thermostat which is part number TH8732WFH5002.
The reason why is because the 1st generation Lyric thermostat is missing a necessary internal chip and common wire "C wire" terminal that allows for compatibility with Apple Homekit. If you don't have the 2nd generation Honeywell Lyric thermostat than you will need to replace and purchase the 2nd generation thermostat to gain these features.
Once you have installed the Honeywell Lyric 2nd generation thermostat into your home or business the next step is to connect to the Lyric App. After you have successfully connected to the Lyric App this is what will allow your Lyric thermostat to be controlled by Siri and the Apple HomeKit.
Click the PDF document below to show you step by step instructions on how to Install your Honeywell Lyric thermostat with Apple HomeKit.
Honeywell Lyric Security System Apple Homekit
The Lyric thermostat is not just a standalone Wi-Fi thermostat Honeywell has developed a whole wireless connected platform around the thermostat. The Lyric wireless connected platform includes a whole line of encrypted security products and at the front line of the Lyric security system is the Lyric Controller.
The Honeywell Lyric controller is the main control panel for both security and home automation features and has built upon many years of Honeywell wireless professional security systems. If you want to Learn more about the Honeywell Lyric security system Click HERE.
To clarify a common question the Honeywell Lyric security system doesn't utilize the Lyric App it uses a different application and its called Total Connect 2.0. You may be thinking that is a bit confusing so I will simply.
Total connect 2.0 is for control of your security and home automation features including basic functionality of your Lyric thermostat. But, as far as being able to use Siri and Apple HomeKit this will only apply to your Lyric thermostat. For example: You can't ask Siri to arm or disarm your security system you will only be able to control features of the Lyric thermostat specifically from Siri.
The reason why is because Apple HomeKit and Siri are only able to connect to the Lyric app. So in conclusion, You are able to integrate the Lyric thermostat into the Lyric security system and be able to control and setup smart scenes through total connect 2.0. But, if you want to control your Lyric thermostat via voice commands through Apple HomeKit and Siri this will be done through the Lyric app.
At the end of the day you are able to have the best of both worlds still because both the Lyric App and Total Connect 2.0 can exist together to provide you with all the functionality.