@quoquopuffs There is a beta utility you can possibly try but is for a Windows computer: link Regarding the Mac error message you may need to override the security: link

@Jonathandavid It sounds like setting up the extender is not successful or the 2.4G or 5G would be solid. I would recommend verifying the wireless password you are using in the Kasa app during setup...

@bolletjenomat Regarding logging in, I'm wondering if the names being the same may be causing an issue. I would likely go with the network names being unique in that it avoids any confusion and...

@super_boris One of the things you can try is to log into the RE305 via a web browser, and go to Settings > Network, and manually assign the IP information. With respect to the DNS, you can reference...

@Barnmb Ignore the underline and use just numbers and letters.

@Tstick93 You could probably have another C510, and then connect an indoor AP unit to broadcast the Wi-Fi indoors.