I have used serial device using RS232 communication. I want to check signal of device. When I push its button, I can get Hexa data (After I will say signal). My computer has 4 serial ports (main board: asrock IMB-183), so I want to connect serial to device. When I test the device using USB2SERIAL, I can get the signal with minicom. But when I use serial port, minicom does not work.
I checked the Rx, Tx using Windows (same computer and same device) with serial at terminal program (like highper terminal), I can get the signal. So I think I have problem with Linux together with using serial port.
I checked my BIOS. At SuperI/O I turned on COM port to enable. and I checked group, dialout.
Now I show you status of my computer and device.
# id ......, 20(dialout), ....... # cat /proc/tty/driver/serial serinfo : 1.0 driver revision: 0: uart : 16550A port : 000003F8 irq: 4 tx:0 rx:0 RTS|DTR 1: uart : 16550A port : 000002F8 irq: 3 tx:0 rx:0 RTS|DTR ........
linux 3.13.0-32-generic, Ubuntu 12.04