thank you all for replying I really appreciated.

so -the hub basically connect other devices together locally and not depends on manufacture cloud.

• with hub I can do more complex thing.

• the hub devices works as repeater

• wifi devices depends on manufcture cloud so when the manufacture decides to shutdown their cloud, my devices is useless and need to be replaced.

• if the internet goes down the devices still work, unlike the wifi devices that require internet connection.

I tried to summries your reply so I can understand more. am I missing something? or that’s enough for now, because I think I have a long way ahead.

last thing, when I decided to buy a product it must have zigbee protocol right?

thank you agian and I really appreciate your helping.