Hi there,
So this is a very good sensor, but I feel your pain with the comms.
RS_485 is one of the most versatile interfaces , support P2P, Master/Slave, Multi-Drop. and more.
Takes a bit to get it going , but most robust of all of them.
have you loaded the App?
What code have you tried, and how do you have it connected. Any pictures?
of post up the code you are trying.
HTH
GL 
PJ
