How can I see the openflow switch in Opendaylight

I just installed the openflow extension to Mikrotik hAP ac router. I installed Opendaylight controller (version Oxygen) to a windows computer. I attached the computer to the Mikrotik router port eth4. I saw that the IP address of the computer is 192.168.88.254. I entered the Terminal of the Mikrotik router and I created an openflow switch in the routerboard by the command

/openflow add controllers=192.168.88.254 name=ofswitch1 passive-port=6633

When I enter Opendaylight Dlux web control panel from the address http://localhost:8181/index.html, both the Nodes and the Topology pages are empty. Why? How can I see the Mikrotik openflow switch ofswitch1 in the node list page of Opendaylight?