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One of the first extensions added was the Expander Plug, an 8-bit general-purpose digital I/O interface.

So now, with just two pins consumed on the ATmega, you could have up to 32 input/output pins (by daisy chaining 4 of these plugs and setting them each to a different I2C address).

There is infinite potential in each of us, and I’m certain that if we can tap even just a tiny fraction of it, the world will be a better place.

I’d like to think that I’ve played my part in this and wish you a lot of happy tinkering. I can assure you that my interests and passions have not changed, and that I’ll remain as active as ever w.r.t. The whole point of this change is to allow me to invest more focus and time, and to take the Jee Labs projects and products further, in fact. Following the advice of some friends I highly respect, I’m making this last weblog post open-ended: it’ll be .

With the Dive Into Jee Node series, I wanted to single out a specific range of technologies as an example of what can be accomplished today with open source hardware and software, while still covering a huge range of the technology spectrum – from C/C running on a chip to fairly advanced client / server programming using Java Script, HTML, and CSS (or actually: dialects of these, called Coffee Script, Jade, and Stylus, respectively).

pick and route individual pins for each case where some component or sensor was being connected.

That meant you could connect up to at least four sensors independent of each other.I’m writing this post while one of the test Jee Node Micro’s here at Jee Labs is nearing its eighth month of operation on a single coin cell: It’s running the radio Blip2 sketch, sending out packets with an incrementing long integer packet count, roughly once every minute: The battery voltage is also tracked, using a nice little trick which lets the ATtiny measure its own supply voltage.As you can see, the battery is getting weaker, dropping in voltage after each 25 m A transmission pulse, but still recovering very nicely before the next transmission: Fascinating stuff.If you’re familiar with hardware development or have some experience with the Arduino world, then this same setup lets you get familiar with setting up a self-contained low-power Linux server and try out the command line, and many shell commands and programming languages available on Linux.If you’ve set up a home automation system for yourself in the past, with PHP as web server and My SQL as back end, then this same setup will give you an opportunity to try out rich client-side internet application development based on Angular JS and – or perhaps simply hook things together so you can take advantage of both approaches.

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