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 CocoaMQTT client library is written in:
- Objective-C.
- Swift 2.
- Swift 3.
- In the CocoaMQTT client library, a
CocoaMQTTinstance represents:- The synchronous MQTT over WebSockets client.
- The asynchronous MQTT over WebSockets client.
- The asynchronous MQTT over TCP client (no WebSockets).
- Which of the following methods does the CocoaMQTT client call after a message is received from the MQTT server?
func mqtt(_ mqtt: CocoaMQTT, didReceiveMessage message: CocoaMQTTMessage, id: UInt16 ) {.func didReceiveMessage(_ mqtt: CocoaMQTT, message: CocoaMQTTMessage, id: UInt16 ) {.func mqtt(didReceiveMessage message: CocoaMQTTMessage, id: UInt16 ) {.
- Which of the following properties of a
CocoaMQTTMessageinstance provides the string representation ...
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