@Penduko There are no trunk or access ports in TP-Link switches per se. There are only general ports, but you can configure them so they behave in a similar way to CISCO trunk or access ports. To set...

@lakmalv Try Port 6 untagged in VLAN 200, PVID of 200, and tagged in the other VLANs. If it still does not work, manually set a static IP address in the VLAN 200 subnet range.

@orfenegro That would be a mistake. I don't want to speculate what would happen.

@Penduko Maybe inspecting the MAC address and ARP tables can shed some light on this unusual phenomenon.

@orfenegro Your switch does not need those static routes, but your router needs them. They tell the router that you have additional subnets on the network, beside the subnet the router is in, and how...

@xRuby What's the subnet mask? How exactly is IP configured in those smart devices? How exactly do you try to connect to them?