I’m a complete beginner. I’ve got some basic knowledge back then from school, but well, it didn’t keep me from installing DS18B20 in every room of my flat and wanting to read them via my Arduino Ethernet. I’ve been using the usual tutorials to set this up. Right now, I have a shielded cord containing two wires (2x0.14 mm^2). I’m using the shield as GND and the two wires as +5V and I/O.
It looks basically like this:
<breadboard with 4.7k pull up resistore from +5V to I/O line>------10 meters -----------5 meters-------
It’s working well, that way, BUT if I add another DS18B20 directly to the rails of my bread board and do a rescan (added such a function to my code), no sensors can be found at all. Also tried it with a different sensor to rule out defective parts.
I bet there’s a very stupid flaw somewhere, but can’t find it. Any ideas?