@Pankracij If you've set C50 IP address as dynamic IP you should confirm its IP address from the DHCP client list of your main router. Use this IP address to access its web management. If you set C50...

@MoreConfused In AP mode you'll get better speed and connection stability for sure. But if you want to avoid cables, you can try replacing your C80 for C64 or C86.

@MoreConfused That's correct. Another option that you could use is the C80 AP mode (Case 1) but that involves additional cabling (if applicable).

@MoreConfused I really don't know the answer to this question but earlier in the same thread there's another post which offers a possible justification.

@Luca5chv Can you post a screenshot of your TL-WA850RE LAN configuration ? Any DHCP address reservation or IP&MAC binding configured on your router ?

@Yorocoboy Try to power the WA1201 with its 12V/1.5A original power adapter (not the passive PoE) and check if there's any difference.