@stone7, your topic has been moved to a more suitable location on the forum. Introductory Tutorials is for tutorials that e.g. you write, not for questions. Feel free to write a tutorial once you have solved your problem 
I have no experience with the newer Nanos so can't really help. Some points
- Double / triple check the wiring, post a schematic and your code.
- The original Nano was a 5V device, how did you connect a 3.3V sensor to it? Level shifters? If so, did you remove them from the design?