I have a Panel PC which was Android OS. In this Panel PC, There are two DB9 Port which can use RS232, RS232/422/485.
It was possible to communicate serial data using USB port [for example FTDI chip or PL2303].
But I want to use the DB9 Port without FTDI or PL2303.
I know that linux is possible to communicate using device driver directly.
Are there any method to access to device driver directly in Android OS like Linux?
Please Help me.