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I'd like to sprinkle my house with 1-wire sensors (temperature - everywhere, humidity and flooding - in the basement), but the only wire in most locations is the power-socket (110V)...

Can a 1-wire microlan simply coexist with the AC power without short-circuiting and without the readings getting lost? If not, perhaps, HomePlug AV devices can be used?

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1 Answer 1

The device you inquired about, the DS18B20, can not be directly connected to AC power circuits. It requires a DC supply of 3.0 to 5.5V. Some sort of power-line modem or interface circuit, at a minimum, would be necessary to connect a raw sensor IC such as this to an AC power line circuit. Anything that involves communications over 110V AC power mains should not be considered a "do it yourself" kind of projet. I would suggest sticking to the Home Plug AV devices you mentioned, or similar commercial power line communications devices.

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Any idea, if HomePlug AV devices can be used to simply pass a signal (simulating 4 twisted pairs found in an Ethernet cable), or must I use actual Ethernet protocol to get data through the AC-power wiring? Thanks! –  Mikhail T. Dec 4 '12 at 14:18
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