How to connect a WiFi hotspot to a hotspot?

Question

WiFi

Good day!
The problem happened, I don’t know how to solve it ... I’m making a Wi-Fi network for a large room, in order to expand the coverage area, I connected 2 more routers to the main router (Router 1) via lan ports (router 2, router 3), on routers 2 and 3 disabled DHCP, assigned different channels, the SSID and password for Wi-Fi are the same, everything works fine ... it was necessary to expand the coverage ... HERE THE PROBLEM BEGINS connected router 2.1 to router 2, also disabled DHCP, named the network by the same name , put an unoccupied channel, but there is no access to the Internet through a 2.1 router ... Tell me, please, how to solve this problem?
all TP-link 740N routers

Answer 1

Ports come in two varieties - LAN and INTERNET
You only need to put the Internet on INTERNET on router 1
In other cases, connect everything via LAN
Is that right for you?