1. First we need to define the first port for WAN connection so the router will connect to the internet via another router with DHCP.
In winbox click IP > DHCP Client and Add DHCP Client to port ether1
2. Let's add the hotspot service to wlan Click IP > HotSpot and the Setup box, choose wlan1 as hotspot interface. You can accept default values but choose none for certificate. Leave the IP as it is (10.5.50.x). If you change this IP, the LOGIN and LOGOUT links will not work on your splash page.
In the hotspot profiles (IP > HotSpot > Profiles) choose your hotspot profile and allow radius in the radius tab, de-select cookie, allow http pap and chap.
Click Servies > Hotspot, enter radius address: 18.104.22.168, Secret: hotsys123
Drag and drop this login.html to your "hotspot" directory in the Winbox program.
If you wish to use FTP you can FTP to your mikrotik router with the admin userid and password and replace the file there under the 'hotspot' directory.
11. As the last step you have to add hourly checking for up status for the Router Alert feature.
Policy: enable all
Press Apply and OK.