@Allispossible " My main router had its local IP 192.168.1.1 and the TP-Link device received IP 192.168.1.3. The TP-Link's device own network was 192.168.0.1. This worked completely fine until the...

@m_schulz This will depend on your particular environment and wireless clients - that's the reason this is not specified in the tech specs of the device. This story will be a good starting point.

@Nav97 Better consider an easymesh device - they have better compatibility and interoperability. A good candidates which fit your requirements: Archer AX55, AX53 (Wi-Fi 6) Archer C86, C64 (Wi-Fi 5)...

@Manolisk Yes, that's correct because you're not using its WAN port anymore, this shouldn't be a major concern. In this scenario the device time can be set manually and the FW can be upgraded...

@Manolisk When configuring according Case 2 pay attention that you actually don't switch to AP mode, but using the device in wireless router mode where this feature is available. In this case the...

@Manolisk Yes, that's possible in AP mode (Case 2) that's the configuration you're asking for.