October 2019
Intermediate to advanced
350 pages
9h 5m
English
Content preview from Hands-On Internet of Things with MQTT
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Chapter 8: Building a Smart Productivity Cube, Part 2
- MQTT apps for iOS and Android can be used to both display and send MQTT messages. Their purpose is to build a personal dashboard that allows you to consume all of the important information published by your MQTT devices and to control them by publishing messages as well.
- To send just the activity time (without the activity name), you have to change the client.publish("/tims-channel/cube/activity", text); line to client.publish("/tims-channel/cube/activity", timeSpend);.
- A good client ID, to be compatible with most MQTT clients and servers, should be no longer than 23 characters and only contain regular characters (a-z, 0-9, and -). Also, you should make sure that nobody else is using ...
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