1-Wire Temperature Sensor Distance

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skr0d
 
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1-Wire Temperature Sensor Distance

Post by skr0d »

Does anyone have any idea about a distance limitation on the 1-Wire network?

I want to put out several temperature sensors http://www.adafruit.com/products/374 and am trying to decide if I should make a large on-wire network to read the many temperature sensors, or maybe deploy a bunch of 3.3v Trinkets with their own temp sensor and a wireless transmitter back to a central station.

If I can make a large 1-wire network, it is easy to power from one device, but requires a lot of wiring through walls and stuff (all over my house).

If I make a bunch of small trinket/temp sensors, I have a lot of batteries to keep charged, and I have to figure out a reliable (and inexpensive) way to transmit the temperature data using a wireless signal. I found some 433MHz TX/RX pairs, but have heard that they are unreliable. XBee would be nice, but exceeds my budget. Same with 802.11.

Thanks for the input!

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adafruit_support_bill
 
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Re: 1-Wire Temperature Sensor Distance

Post by adafruit_support_bill »

Maxim has a nice app-note on the subject here: http://www.maximintegrated.com/app-note ... mvp/id/148

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