doph2013-01-06 00:33:21
doph, 2013-01-06 00:33:21

1-wire sensors and that's it?

I'm building a house. Until the walls were sewn up, I decided to lay some kind of network for a smart home, so as not to suffer later. I decided to break everything into three segments - “sensory” - all sorts of sensors to collect information and know what is happening where, “annunciator” - so that you can send an alert to any end of the house (the speakers are different) and “control” - so that you can the necessary devices to send a control signal - "turn on this, turn off that."
I decided to start with the first, sensitive part. I drew a floor plan in visio, laid out different sensors on the plan. The main ones turned out to be - sensors for temperature and humidity, light, air quality (to feel an unhealthy concentration of gases), motion sensors, and little things - sensors that respond to water, and so on. There were about 60 different sensors.
To interrogate sensors, I have a raspberry (good thing, I played with it a little already).
Here are my questions:
where to buy sensors and how to understand that they are suitable for 1-wire?
what wires to pull? twisted pair (2 pairs) - okay?
What else is important not to forget, so as not to be sad later?
(I don’t know how to solder) Are there “hubs” in nature to connect all the wires or just solder it yourself or connect everything on some “comb” - is this also a good option?

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1 answer(s)
Eddy_Em, 2013-01-06

1-wire is expensive. Cheaper - a bunch of analog sensors + a cheap microcontroller. Communication - via CAN bus (it's easier than implementing via ethernet). The terminal controller can already be done with ethernet or USB (depending on what you need).
If you need exactly 1-wire, then the choice is not very big. And you need to pay attention to the fact that the sensors have their own ID (otherwise some Chinese fakes do not have an identifier, so it is impossible to work with them). If the sensor cannot be powered from the line, 3 wires will be needed. For short distances, the vitukha is enough for the eyes, or even four-wire "noodles" for RJ-11.

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