Hi,
Can you post a fully connected schematic, including
Show power supply and please connecting wires.
Your diagram is okay for PCB manufacture but a hopeless "search a word" for trouble shooting.
Use gnd and 3V3 symbols, but please connect everything that is connected.
You have no bypass capacitors anywhere in your circuit, you need also to add the suggested capacitors to the 1702 as in the datasheet.
Tom... 
