Hi Everibody !!
I don't take long with the subject of raspberry.
In this moment I'm working at project for connection betwen Rpi and JCM (bill acceptor). its communication is serial. After an investigation, I disable bluetooth, modify some files linux and leave the pin 15 and 16 as UART rx and tx module. I'm implementing example the following code:
http://pi4j.com/example/serial.html
But the bytes sent from the PC, I don't get to see the raspberry, I have a breakpoint in netbeans, where I have a listener for receiving data in the raspberry. I clarify the communication tests, I'm doing between PC and the RPI. with a sniffer only I see RPI data sent to the PC, but not vice versa.