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1<!doctype html><html lang=en-us><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><link href="data:image/x-icon;base64,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" rel=icon type=image/x-icon><title>Wireless sensor networks</title><meta name=description content="Zigbee networks have this wonderful capability to self-heal, which means theycan reorder connections between them if one of them is inoperable."><link rel=alternate type=application/rss+xml title="Mitja Felicijan's posts" href=https://mitjafelicijan.com/index.xml><link rel=alternate type=application/rss+xml title="Mitja Felicijan's notes" href=https://mitjafelicijan.com/notes.xml><style>body{padding:1rem;max-width:760px;background:#fff;font-family:times new roman,Times,serif;line-height:1.35rem}hr{margin-block-start:1.5rem}h1,h2,h3{line-height:initial}footer{margin-block-start:3rem}table{max-width:100%;border-collapse:separate;border-spacing:2px;border:1px solid #000;border-left:1px solid #999;border-top:1px solid #999}blockquote{font-style:italic}table thead{background:#eee}td,th{border:1px solid #000;padding:4px;border-right:1px solid #999;border-bottom:1px solid #999;text-align:left}pre{text-wrap:nowrap;overflow-x:auto;margin-block-start:1.5rem;margin-block-end:1.5rem;padding:.5rem 0;border-top:1px solid #000;border-bottom:1px solid #000}pre code{line-height:1.3em}pre,code,pre *,code *{font-family:monospace;font-size:initial!important}img,video,audio{max-width:100%}header{display:flex;flex-direction:row;gap:3rem}nav{display:flex;gap:.75rem}.pstatus-orange{background:gold}.pstatus-green{background:#9acd32}.pstatus-red{background:#cd5c5c}@media only screen and (max-width:600px){header{flex-direction:column;gap:1rem}a{word-wrap:break-word}}</style><header><nav class=main><a href=/>Home</a>
2<a href=https://git.mitjafelicijan.com/ target=_blank>Git</a>
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6<a href=/index.xml target=_blank>RSS</a></nav></header><main><div><h1>Wireless sensor networks</h1><p>Oct 24, 2013<div><p>Zigbee networks have this wonderful capability to self-heal, which means they
7can reorder connections between them if one of them is inoperable. This works
8our of the box when you deploy them. But you have to have in mind that achieving
9this is not as easy as you would think. None of it is plug&amp;play. So to make
10your life a bit easier, here are some pointers which, I hope, will help you.<ul><li>Be careful when you are ordering your equipment abroad. There are many rules
11and regulations you need to comply before you get your Xbee radios. What they
12do is they wait until you prove that you won’t use the technology for some
13kind of evil take over control of the world project :). For this, they have
14EAR (Export Administration Regulations) which basically means “This product
15may require a license to export from the United States.”.<li>I don’t know if this applies for every country, but when we purchased our Xbee
16radios from Mouser, this was mandatory! What we needed to do was to print out
17a form and write information about our company and send them a copy via
18email. With this document, we proved that we are a legitimate company.<li>When you complete your purchase and send all the documentation, you are not
19clear yet. Then customs will take it from there :). There will be some
20additional costs. Before purchasing, make sure you have as much information
21about costs as possible. Because it can get costly in the end.<li>I suggest you use companies from your country. You can seriously cut your
22costs. Here in Slovenia, the best option so far as I know is Farnell. And
23based on my personal experience, they rock! All I need to say!<li>Make plans when ordering larger quantities. Do not, I say, do not make your
24orders in December! :) Believe me! You will have problems with stock they can
25provide for you. So, we were forced to buy some things from Mouser, which was
26extremely painful because of all the regulations you need to obey when
27importing goods from the USA.<li>Make sure that firmware version on your Xbee radios is exactly the same! Do
28not get creative!!! I propose using templates. You can get template by
29exporting settings/profile in X-CTU application. Make sure you have enabled
30“Upgrade firmware” so you can be sure each radio has the same firmware.<li>And again: make plans! Plan everything! In months advanced! You will thank me
31later :)<li>Test, test, test. Wireless networks can be tricky.</ul><p>If you are serious, I suggest you buy this book, Building Wireless Sensor
32Networks. You will get a glimpse of how networks work in lumens terms. It is a
33good starting point for everybody who wants to build wireless networks.<p><strong>Additional resources:</strong><ul><li><a href=http://www.digi.com/aboutus/export/generalexportinfo>http://www.digi.com/aboutus/export/generalexportinfo</a><li><a href=http://doresearch.stanford.edu/research-scholarship/export-controls/export-controlled-or-embargoed-countries-entities-and-persons>http://doresearch.stanford.edu/research-scholarship/export-controls/export-controlled-or-embargoed-countries-entities-and-persons</a><li><a href=http://www.bis.doc.gov/licensing/exportingbasics.htm>http://www.bis.doc.gov/licensing/exportingbasics.htm</a></ul></div></div></main><footer><hr><div><h3>Want to comment or have something to add?</h3>You can write me an email at
34<a href=mailto:m@mitjafelicijan.com>m@mitjafelicijan.com</a> or catch up
35with me
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