Connection stuck consistently at 87%. 

Hi I'm trying this example app to connect to my OBDII ELM327. But it consistently stuck at 87%. 
I have absolutely no clue on why it happened. But I couldn't get a successful connection. Please help. 
<img width="996" alt="screen shot 2018-07-21 at 23 02 53" src="https://user-images.githubusercontent.com/26127202/43036844-5abaed78-8d3a-11e8-97dd-01d06a31d2b1.png">
