Let's talk about the 'N' in WSNs
Feb 3, 2016

The acronym “WSN” stands for Wireless Sensor Network. Ok sure, we all have one or more wireless sensor nodes, JeeNodes or whatever, and they probably work nicely. But how do we manage them? What about code revisions?

Let’s go into this for a moment. Because the usual approach of: “a sketch, an upload, and off you go” doesn’t really scale well. How do you manage all those nodes, which may be different in functionality, in their hardware, or even just be different models or revisions of the same type?

But first, I’ll start off this week with a note about running the hub in the background:

And just to keep a clear model of the hub’s main role in front of you, here’s the diagram from last week’s configuration guide again:

Latest hub v4.0-45 builds now on GitHub.

For comments, visit the forum.

What's in a hub?
Jan 27, 2016

The restart of the JET project is progressing nicely. This week’s episode is about installing a first version as a basic-yet-functional new core system and describing / documenting some of the central features being built into the hub.

So here goes, one story per day, about what JET/Hub is all about:

Yes, that’s a lot of articles for one week. Because there’s a lot to describe!

Here’s another little diagram, this one is from 2014 - even older than last week’s:

And yet it’s still mostly applicable to JET …

For comments, visit the forum.

Overcoming JET lag
Jan 20, 2016

Long-time readers of this weblog know that the topics here have always been all over the map - electronics, digital design, embedded firmware, but also trying out new stuff, getting organised, re-thinking software development, and more. This week is no exception…

I’d like to revisit the design of a long-term home monitoring and automation system for use here at JeeLabs. If you’ve been keeping count, you could call it “HouseMon IV”, but I’m going to stick to the name “JET” for this project.

Here are this week’s articles, as always presented in a few day-sized chunks:

And since a picture is often worth more than a thousand words, here is one:

This diagram was made early 2015 for the intial README page of JET, and the basic design of the system now being presented really hasn’t changed that much.

For comments, visit the forum.

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