I already have a simple program with botton, did in Enclipse,
Now I need that each botton send an HEX string when is touched them.
So I need that some one teach.
The way to teach is adding the necessary code in my prograrm.
So I could see the code and learn.
But it is really important that the person know how USB/RS232 interface works.
It must work in any tablet with Android 4.