@Drillo If you do not have any particular speed needs I would seggest to use Archer C54 router in RE mode on 2.4GHz band:

@Biglurr54 There are two options which you could choose from: 1. Use the RE315 in AP mode routing an ethernet cable to them. In this scenario you'll get the best bandwidth and stability from your...

@MrDav0 This modem router is apparently provided by the ISPs - that's the reason you can't find its FW on the support portal. You should contact your ISP with the issue description for assistance.

@Jacopo Unfortunatelly C50 doesn't support building any mesh networks. You can still connect range extenders to C50 but you won't benefit from the mesh seamless roaming.

@superfly71 TL-MR6400 supports only a VPN Server which can be seen by its specs.

@RichG83 Make sure that the TL-WA801ND IP address is in the same subnet as your main router and the TL-WA801ND DHCP server is disabled. If that doesn't help set a static wireless channel on your main...