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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Chapter 4. Interacting with Sensors in Java
In this chapter, we will write Java code to control sensors with MQTT messages. We will write code that will be able to run on different popular IoT platforms. We will:
- Understand the requirements to control sensors with MQTT
- Define the topics and commands to control sensors
- Install the Eclipse Paho Java Client
- Create a security helper class to establish a TLS secured connection
- Configure a TLS secured connection in Java
- Work with asynchronous notifications and callbacks in Java
- Subscribe to topics and understand notification events in Java
- Process commands that interact with sensors in Java
- Work with last will and testament in Java
- Publish messages with commands to target sensors
Understanding the requirements ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.