Hello,
I am using SmartThings for almost 5 years now. I have problems with almost 2-3 days I need to turn off hub and turn it on because lights goes crazy, automations delayed for 1-2 minute etc…
I am last few days looking will all my devices I have a lot of them be compatibile with HA, and I found that pretty all of them will be good I think.
I have some questions before migrating, because I didint have this type on instalations on Smartthings so I am little bit confused.
First , most of my devices are Zigbee, when i am reading compatibility with HA, I am getting yes with ZHA, yes with zigbee2mqtt so I am little confused because I didint need to change nothing on Samsung, and now I don’t know what I need to buy.
I am having right now Smartthings, Google Home (hub).
What I need to get with HA I am thinking about ordering Green, or you suggesting me yellow and why ?
What else I need to buy to get all my devices sucesfully connected ?
HA Green
Aotec z-wave stick for my aotec zwave indoor siren , and water leak sensor and door sensor are zwave only.
Smartconnect zigbee usb
Do I need to buy something other ? for matter for zigbee zha or zigbee2mqtt this I don’t understand how to change do I need more usb sticks this is what is complicating me now things in my decision.
Most of other things are zigbee , Ikea tradfri all light , Ikea tradfri contoler, led controlers are zigbee too. Ikea Motion sensors are zigbee too (problem is because I don’t know are they ZHA or zigbee2mqtt and how I can check this)
Other things are wifi based, samsung tv, remootio for garage, netatmo termostat, ring camera.
I have more questions, can i make in HA virtual sensor and connect them with alarm ? I have many many false alarm with my motion sensor , so in smartthings I put if my 2 sensor get motions then trigger virtual sensor and then activate alarm from then I didint have 1 false alarm because 2 sensor need to be triggered so I hope I can do this in HA too ?
What alarm system is in HA something similar like samsung have ? I can use motion sensor to trigger aotec siren and outdoor siren ?
Another complicated thing I had problem in samsung but resolved it , if I say hey google and some phrase lets say open my garage. I don’t want to ask me everytime unlock code - i resolve in smartthings this on way that I put in scene to open door and that phrase active that scene so i don’t need to say google everytime my unlock code.
Is it possible on HA to say Hey google, I am leaving home , to HA shutdown all lights, temeperature off, put alarm in armed mode with delay of 30 seconds, and open automaticly my garage only with that phrase this I can do in Smartthings so i hope I can in HA too.
Last question , I ordered now AQARA U200 I think conection is matter, I didint use till now matter never so how to connect this when i get HA ? I have Google HUB is it possible to google hub be my matter bridge and then connect to HA ? and what if WIFI goes off or internet even Google hub is my matter bridge will device connected matter on google hub will be usable or offline or you suggesting to get some more sticks ?
Sorry many questions I have but I want to move from Smartthings and you know how is it when you leave more then 5 years in SMART HOME 
!