Not blowing up the Pi by steevc

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homeautomation · @steevc · Nov 1 '16 (edited)

$10.10

Not blowing up the Pi

<html>
<p>I've <a href="https://steemit.com/iot/@steevc/echo-location">mentioned</a> before that I plan to improve my home automation system using a <a href="https://www.raspberrypi.org/">Raspberry Pi</a> running <a href="https://home-assistant.io/">Home Assistant</a>. I'll be replacing an old system which lacks connectivity. The new system will allow me to use all sorts of new technology. They <a href="https://home-assistant.io/components/">list over 400</a> 'components' for everything from wifi lights to Bitcoin price feeds.&nbsp;</p>
<p>My first step is to get my existing PIR sensors and door switches working with the Pi. The sensors run off at least 9V, so I was very wary of overloading the Pi inputs that only handle 3.3V. I did some playing around with resistors and opto-isolators, but it looks like it just needs a resistor on the output. Although I did a degree in electronics many years ago I've worked mostly on software and my hardware experience is limited and rusty. I was able to write a little Python program to poll the input and see when movement was detected.</p>
<p><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/RaspberryPi.jpg/640px-RaspberryPi.jpg" width="640" height="427"/></p>
<p>Image from <a href="https://commons.wikimedia.org/wiki/File:RaspberryPi.jpg">Wikimedia</a>.</p>
<p>The next step is to get Home Assistant to use this. I'll be switching lights using old <a href="https://www.x10.com/x10-home-automation.html">X10 technology</a> as it's what I already have. The Pi will connect to an interface via a USB to serial adaptor. Eventually I hope to get some more modern devices, but I'm not looking to spend lots of money right now.</p>
<p>I've also finally tried to use the <a href="https://www.raspberrypi.org/products/pi-zero/">Pi Zero</a> I got free with a magazine. I don't have adaptors to plug it into much, but I read that it was possible to get access <a href="http://blog.gbaman.info/?p=791">purely over USB</a>. I had some 2GB micro SD cards, so I flashed one of those with <a href="https://www.raspbian.org/">Raspbian</a> Linux. My PC can see the Pi, but it looks like SSH may not be active, so I need to look further into that. I may buy some cheap add-ons for the Zero. There's a <a href="https://thepihut.com/collections/raspberry-pi-hats/products/scroll-phat">scrolling LED display</a> that I could use to show useful alerts, e.g. when a whale votes my posts up!</p>
<p>Update: There's a comment on the USB post above about getting this working with Ubuntu. Just had to tweak a network setting. I've had to change the name of that Pi as the PC was getting confused about ssh keys.</p>
<p>I've been trying to find more time to play with this stuff. It's fun and not too expensive, but time is in short supply. I'll post further updates as I make progress. If anyone wants further details then let me know.</p>
<p><img src="https://steevc.keybase.pub/steemit/steevc.png" width="200" height="200"/></p>
</html>

👍 pharesim, clayop, nextgencrypto, silversteem, kushed, donkeypong, silver, ramta, wang, justin, steemservices, anwenbaumeister, steemship, joseph, shaka, curie, opheliafu, nextgenwitness, barbro, anyx, bue, cryptos, anonymous, fminerten1, mattclarke, krishtopa, xeroc, michaeldodridge, jaewoocho, gargon, smailer, bola, lehard, acidsun, gomeravibz, funnyman, isteemit, asmolokalo, katharsisdrill, zaebars, fubar-bdhr, ratel, titin, masteryoda, pgarcgo, hello, nekromarinist, crowdfundedwhale, steevc, steve-walschot, chloetaylor, fufubar1, blakemiles84, anomaly, lloyddavis, anasya, robotev, babsboard, phenom, vl248, donalddrumpf, randyclemens, bue-witness, world, and 119 others

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@jahtech · Nov 1 '16

Hi looking forward to your future articles. I am waiting delivery off a orange pi which i hope to use for mining. cheers and good luck

👍 steevc

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@steevc · Nov 1 '16

I've not looked at the Orange, but it looks like a bargain. What will you be mining with it?

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@jahtech · Nov 1 '16

Not to sure im pretty new to the hole cryptocurrency thing theres a lot to learn .but im finding it all realy interesting . i was thinking litecoin. At the moment im mining burstcoin which has been a pretty good coin for a learner.still got a few kinks to iron out so i can be more efficient. Have a three week Christmas brake so i hope to use that time to experiment with the orange pi .

👍 steevc

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3 replies

@katharsisdrill · Nov 1 '16

Cool project :) Building the internet of things yourself. That's the way to go.

👍 steevc

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@steevc · Nov 1 '16

I like to have control of the technology I use, but it is more work to do it yourself.  Once it's all set up it should be fairly easy to use.

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@katharsisdrill · Nov 1 '16 (edited)

I always do it myself too, the time is just the price of being curious. All these projects...

👍 steevc

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@linkback-bot-v0 · Nov 2 '16

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@opheliafu · Nov 1 '16

Exciting stuff! Looking forward to your updates on this.

👍 steevc

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@virtualgrowth · Nov 2 '16

https://img1.steemit.com/192x192/https://s15.postimg.org/hlkpghmkr/Spot_light.png
[Included in Steemprentice Spotlight](https://steemit.com/steemprentice/@virtualgrowth/steemprentice-spotlight-sharing-steemit-stuff-and-skills) :)
Tweeted by [SteemLand](https://twitter.com/Steem_Land)
http://www.onlinesignature.in/animateText/text785697588.gif

👍 steevc

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