I will just list few cons what I found on some products before moving on to what I selected, exactly as I did with relays<\/a>.<\/p>\n I decided to go on with 1-WIRE based technology: DS9490R USB-to-1-wire adapter<\/a> and DS18B20 sensors<\/a>. Why? Because temperature sensor price is only about 1 EUR and even less if ordered from China. 1-wire technology supports big range: 200-500m<\/a>. There are available also other f.e. humidity sensors what can be plugged to the same bus. I don’t know how negative it is but this selection requires some cabling\/soldering and preferably externally powered connection hub to take the load off from the adapter and USB socket.<\/p>\n DS9490R image from http:\/\/datasheets.maximintegrated.com\/en\/ds\/DS9490-DS9490R.pdf<\/p><\/div>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n Sensors are available in original (TO-92<\/a>) form as shown on image in the right and also as a ready-made probes with attached cable (claimed to be waterproof). Search DS18B20 from Ebay and you will see. If the cable length is enough you can save a lot of soldering. I used original TO-92 form sensors, cut ordinary RJ12 phone cables in half, soldered sensor to one end and connected other end (with RJ12) plug to the home made 1-wire hub which had RJ12 sockets but this is already story for next how-to.<\/p>\n If you found this useful, say thanks, click on some banners or donate<\/a>, I can always use some beer money.<\/p>\n\n
![\"DS9490R](\"http:\/\/www.bashpi.org\/wp-content\/uploads\/2014\/07\/DS9490R.jpg\")
<\/a>![\"DS18B20\"](\"http:\/\/www.bashpi.org\/wp-content\/uploads\/2014\/07\/DS18B20.jpg\")
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