Authenticate iptv , smart tv(browser less devices) over freeradius

Hello every body . I am working on hotspot sysetm with mikrotik and freeradius, I can do AAA for all devices without problem , but I have problem when trying to authenticate smart tv with freeradius , these devices don’t have any internet browser so they can not redirect to captive portal login page , how can I make authentication for such these devices , Isearched a lot but without success ,are there any chanse to get this idea ?