April 2017
Intermediate to advanced
280 pages
6h 18m
English
Content preview from MQTT Essentials - A Lightweight IoT ProtocolBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Test your knowledge
- The Eclipse Paho JavaScript client provides:
- Only a non-blocking (asynchronous) API.
- Only a blocking (synchronous) API.
- Both a blocking (synchronous) and a non-blocking (asynchronous) API.
- In the Paho JavaScript API, the
Paho.MQTT.Clientobject represents:- The synchronous MQTT over WebSockets client.
- The asynchronous MQTT over WebSockets client.
- The asynchronous MQTT over TCP client (no WebSockets).
- After the
Paho.MQTT.Clientinstance establishes a connection with the MQTT server, the callback assigned to which of the following attributes of theconnectOptionsobject passed as an argument to theconnectfunction will be called?connectCallback.onSuccess.onConnect.
- After the
Paho.MQTT.Clientinstance receives a message from one of ...
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