You're reading from Mastering Embedded Linux Programming - Third Edition

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Published inMay 2021

PublisherPackt

ISBN-139781789530384

Edition3rd Edition

Concepts

Embedded Systems

Authors (2):

Frank Vasquez

Chris Simmonds

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Using Mender for local updates

So much for the theory. In the next two sections of this chapter, I want to demonstrate how the principles I have talked about so far work in practice. For these examples, I will use Mender. Mender uses a symmetric A/B image update mechanism, with a fallback in the event of a failed update. It can operate in standalone mode for local updates, or in managed mode for OTA updates. I will begin with standalone mode.

Mender is written and supported by mender.io (https://mender.io). There is much more information about the software in the documentation section of the website. I will not delve deeply into the configuration of the software here since my aim is to illustrate the principles of software updates. Let's begin with the Mender client.

Building the Mender client

The Mender client is available as a Yocto meta layer. These examples use the Dunfell release of the Yocto Project, which is the same one that we used in Chapter 6, Selecting a Build...

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Mastering Embedded Linux Programming - Third Edition

Published in: May 2021Publisher: PacktISBN-13: 9781789530384

Authors (2)

Frank Vasquez

Frank Vasquez is an independent software consultant specializing in consumer electronics. He has over a decade of experience designing and building embedded Linux systems. During that time, he has shipped numerous devices including a rackmount DSP audio server, a diver-held sonar camcorder, and a consumer IoT hotspot. Before his career as an embedded Linux engineer, Frank was a database kernel developer at IBM where he worked on DB2. He lives in Silicon Valley.
Read more about Frank Vasquez

Chris Simmonds

Chris Simmonds is a software consultant and trainer living in southern England. He has almost two decades of experience in designing and building open-source embedded systems. He is the founder and chief consultant at 2net Ltd, which provides professional training and mentoring services in embedded Linux, Linux device drivers, and Android platform development. He has trained engineers at many of the biggest companies in the embedded world, including ARM, Qualcomm, Intel, Ericsson, and General Dynamics. He is a frequent presenter at open source and embedded conferences, including the Embedded Linux Conference and Embedded World.
Read more about Chris Simmonds

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