(Mandatory, for Streaming API PubNub events): Install Hub configured to connect to Sandbox tenant. See guidance here. The client-side REST API is also used in this demo to detect your Plantronics "device Id". Note Firefox users: If you get "Error connecting to Plantronics Hub." then visit this URL: https://127.0.0.1:32018/Spokes/DeviceServices/Info and click Advanced > Add Exception... to add a security exception to allow the connection.