Help with VLAN and DHCP

[vellanix]

I need some help with the VLAN configuration since I'm newbie configurig them!

I have a Linksys router (LRT214) and a TP-LINK Smart Switch TL-SG2008.
The switch has port 1 to 7 with different devices and port 8 going to router.
The router has WAN port to internet and port 4 to switch.
The DHCP server is running on the router.

I have some VLAN on the switch that you can see on the attached screenshot.
And no VLAN configured on the router.

Eveything is working fine except that if I connect a new device on the router port I cannot get the IP address from dhcp.

So I think I have to configure the reouter in some way to give dhcp address also on devices attached directly to the router.

Any idea?
Thank you

 

[Cloud200]

Try disconnecting the switch and test a device on port 3 and again on port 4.
Can you get an address in either situation?