Ok, i read from the play.google you require 1.4/1.4+ for connection.
Even read you have an old 1.4 which you bought from china long time ago.
What i have learned, adapters from eBay often claim they are version 1.4, but are actually Chinese rewrite-1.5's.
There is no ELM327 1.5 as per the ELM electronics website, i acknowledge this.
So, how about you write these Chinese 1.5's into code? They might be buggy. but for example Torque can handle chinese 1.5's.
It is a bitch to find a 1.4 today unless you want to buy genuine IC's from ELM electronics and build one yourself.
This software looks promising, but it is not up to date with the hardware in the market today.
I have already bought few of these adapters, advertised as 1.4's from eBay, which are actually 1.5 rewrites. This is getting a bit expensive for a ~5€ software.
All these adapters work just fine with other software, but not with SMO.