Trying different web rtc libraries

Simple Web-RTC

After researching upon SimpleWeb-RTC https://simplewebrtc.com/ it was found that there were issues trying to set up peer to peer connection even after using the sandbox provided by the SimpleWeb-RTC.SimpleWeb-RTC provides the sandbox server for development and testing purpose.But when the following code was tried using there sandbox server the connection couldn't be setup. The javascript file

var room = "hhhhhhh"
        // create our webrtc connection
        var webrtc = new SimpleWebRTC({
            // the id/element dom element that will hold "our" video
            localVideoEl: 'localVideo',
            // the id/element dom element that will hold remote videos
            remoteVideosEl: '',
            // immediately ask for camera access
            autoRequestMedia: true,
            debug: false,
            detectSpeakingEvents: true,
            autoAdjustMic: false
        });
        // when it's ready, join if we got a room from the URL
        webrtc.on('readyToCall', function () {
            // you can name it anything
            if (room) webrtc.joinRoom(room);
        });