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Cross Connection between devices in Realtime

hello,
i creat a page with qr code generator to scan this code with mobile and cross connection beween web and mobile in realtime its mean what i do on web browser i see it on my phone browser (same session or room) . actually this function its work with websockets throught node.js but on bubble i cant use it .
i generate random string and call it to qr code to generate link to session page in this format : https://testapp.bubbleapps.io/version-test/sessionpage/random string .
the logic of this methode is every random string = new room or session .
but now how can open session peer to peer devices ? and sync vision in real time ?

regards