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Smart Home Forum by FIBARO Team

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Fibaro UBS + Dallas on 2 wires



Builders of my house has laid cables for Dallas temperature sensors, but by mistake laid cable with only 2 wires. UBS needs 3 wires, but since Dallas sensor support 1-wire, 2 wires should be enough. I've read thousands pages in the internet and found out which 2 cables could be crossed, but UBS while paring with home center doesn't see temperature sensor. 

Has anybody succeeded with connecting it  that way? Could anybody help me? Now it's to late to change those cables and it's crucial for me to have temperature readouts throughout my home. 


Thank you in advance for help!  

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I believe that this page could help you out:

Please login or register to see this link.

Search for parasite power mode. Also if wires are colored, then black should be GND (most cases).


This one also shows connection:

Please login or register to see this image.



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  • Inquirer
  • Hello, 


    thank you for your reply I will check this site. I have tried parasite power mode but UBS from Fibaro doesn't work with it. 

    But I have not thought about Arduino. 

    Is there possibility to connect Fibaro with Arduino? I have found Z-UNO -> which is an Arduino with Z-Wave module. 

    Does anybody has some experience with it? 



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