For most range extenders, they apply the same way to configure. So you just put the second extender and your router in the same room, then configure it following the installation guide. No special...

What's the model number of router? There are some settings under guest network, such as "allow guest to access my local network", "all guest to see each other", something like that.

The latest version for android is 1.7.10. Does anyone have the same issue on the latest kasa app?

ping the gateway on your computer. or check it on your computer, whether it's the LAN IP address of the main router. do you have other computer that has the same issue?

what's the firmware version of your plug? I found this on the tplink website, http://static.tp-link.com/iotUpgradeTool_V1.0.zip it's upgrade tool to install on the windows computer, then it will...

there will be packets sending for the smart bulb to maintain connection with the kasa app and cloud server, the cloud server records the log or something. Is there a problem using the bulb? or it's...