DaleHeller wrote Thank you very much for your suggestions. I checked the items you mentioned; I'm on the correct firmware according to Kasa; the router is showing -50 db at the switch location on one...

So only one smart switch is not working at that way in the video? What do you mean "manually connect"? Can you control the light with the button on the switch? refer to the FAQ, which step is not...

when it lost internet, do you see the downstream and upstream light are still on? internet light? are you still able to login modem setup page? it is better to locate the problem first. If anyone of...

C9 V1 only support SMB1.

maybe the format is not the one C3150 support. you can refer to this. http://www.tp-link.com/us/faq-603.html

try another computer or other ports on the router