you and your family members can use one tp-link cloud account to control the devices on multiple devices at the same time. That's to say, you can download and install kasa app on their mobiles,but...

no power at all? tried another power sockets?

it may requrire to restart the device to obtain info from the cable. Does it often power outage?

:confused: model number? is the wired connection still working properly? If the wired connection is still working, can you connect Wi-Fi successfully?

hey, you can have a look at this instruction. https://www.tp-link.com/en/faq-398.html

How about the internet IP address on Archer MR200? is it the public IP?