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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Summary
In this chapter, we analyzed the requirements to control actuators wired to different IoT boards with MQTT messages. We defined the topics we would use and the commands that would be a part of the message's payloads to turn the motors on and off.
Then, we created an iOS app with Xcode and Swift 3, combined with the CocoaMQTT client, to control a motor. We wrote code to publish messages to target remote devices in Swift 3, and we were able to process the received messages to provide feedback to the user.
We worked with MQTT.js to write a Node.js script to process commands that simulated the interaction with motors on different IoT boards. We were able to run the iOS app and the Node.js script and understand how all the pieces worked together ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.