Hi nimbusgb,

also consider that your use case looks good for our new brand product, MQTT.Cool, which brings the power of Lightstreamer's engine to the web. Basically, it is a web gateway that you put in front of any existing MQTT broker to boost its native feature in terms of scalability, architecture, and performances.

Keeping focused on your specific case, by using MQTT.Cool you are no longer required to write your own Adapter Set to manage mqtt connections and subscriptions to an external broker, it is actually the MQTT.Cool's job. Just use our Eclipse Paho like JavaScript library (available for the web and node.js runtime), and develop your UI logic by making direct connections and subscriptions to your broker.

You can even deploy the product in production for free.

Have a look at the Getting Started Guide and get back to us for your feedback and further information.

Here some references: