HS220 is a dimmer switch, if you don't have dimmer light, no need to purchase it. HS200 is two way switch, it will requires neutral, live and load lines. If you replace your old switch with the...

I saw someone shared their stories on another thread, that you need to leave 1-2 seconds between on and off action. Maybe you can try that. If no luck, contact tplink support.

Go to settings, location and time, sync location again. And make sure you've enable location permission for the kasa app. Contact tplink tec support if problem not fixed.

That's difficult. Camera and smart home are two different types of product. They have other apps as well, like Tether for router and extender

No archer router can support that. I don't think router for home can handle it.

Router for home like AD7200 doesn't support snmp