@Yaboinebby If someone have moved the RE315 away from the main router the RE could be on the edge of main router 5Ghz wireless coverage. Try putting RE closer the the main router and test how it goes.

@codewarrior The mandatory source of information for the HW version is the router bottom sticker. FW versions for HW v1 and v1.6 should be the same according to TP-Link description: ( Normally...

@kolenda52 There are some models that can suit your needs like Archer C2300, Archer C50 or TL-WR841HP (only 2.4Ghz band). Their availability depends on the local market though. These router models...

@Elon92 There is a recommendation in this guide - Part 3: Q3.6 But if you're about to use RE315 in Easymesh with an ethernet backhaul I believe this recommendation shouldn't be considered.

@TBrady You have to reset the RE to ist factory defaults and then re-configure to connect to your new router. To reset the RE press the reset button for about 10 seconds.

@Phiiliip Yes, you can.