Abstract
Now that you have learned the basic building blocks for constructing a wireless sensor network with the Arduino and Raspberry Pi, you can turn your attention to some of the more intricate details of designing and implementing sensor networks. This chapter explores considerations for planning sensor networks, discusses some advanced sensor network topics, and offers tips for designing databases.
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Notes
- 1.
A cursory examination of professional and scholarly articles suggests there isn’t a standard yet. However, I include some of the more commonly repeated practices as well as a few of my own.
- 2.
There is even an XBee3 cellular modem for that that wants to make a cellular gateway node. See www.digi.com/products/embedded-systems/digi-xbee/cellular-modems/xbee3-cellular-lte-m-nb-iot for more details.
- 3.
Ah, those were the days, eh? ATDT… screech, squawk, bleep, boop, brrrr, bleep, ding, ding, ding!
- 4.
There are more sophisticated sensors that can sense water level over a range and provide a means to calculate water volume. These sensors typically produce either an integer or a float representing the water level.
- 5.
It may take several hundreds of thousands of rows for you to see this in action.
- 6.
You should avoid placing your XBee modules near large metal objects or at the bottom of concrete wells.
- 7.
Like while driving. Sadly, I’ve seen drivers do this. Personal grooming seems to be the most popular form of activity people should never do while driving, after texting, email, tweeting, and so on.
- 8.
Unless your penmanship is far superior to most, this will happen to you eventually. Writing down an idea while riding a bucking train can often lead to illegible text. Sometimes reading such notes in the same environment where they were written helps.
- 9.
In other words, an emergency redesign of a failed implementation—fancy words for a poor design choice.
- 10.
Don’t mount it to the outside of your house and put a huge sticker on that says “database server.”
- 11.
Let’s hope not, anyway.
- 12.
Most disconcerting, isn’t it?
- 13.
You can learn quite a lot about hardware by this approach. You haven’t truly pushed yourself to learn until you’ve made a few mistakes. If you take the proper care and precautions, the end result of minor mistakes is nothing more than a fried component or two.
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© 2020 Charles Bell
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Bell, C. (2020). Putting It All Together. In: Beginning Sensor Networks with XBee, Raspberry Pi, and Arduino. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-5796-8_11
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DOI: https://doi.org/10.1007/978-1-4842-5796-8_11
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Publisher Name: Apress, Berkeley, CA
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Online ISBN: 978-1-4842-5796-8
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