screen /dev/ttyUSB0 - no output

[jago25]

OK, so I couldn't get the Windows USB driver to work. So now I'm trying linux instead.

But when I connect screen or just try to cat /dev/ttyUSB0 I get nothing:

jjj@IDPP-1377 ~ $ dmesg |tail
[ 3578.400479] usb 2-1.3.1: Endpoint 2 MaxPacketSize 512
[ 3578.400483] usb 2-1.3.1: Setting MaxPacketSize 512
[ 3578.400881] usb 2-1.3.1: FTDI USB Serial Device converter now attached to ttyUSB0
[ 3578.403132] ftdi_sio 2-1.3.1:1.1: FTDI USB Serial Device converter detected
[ 3578.403211] usb 2-1.3.1: Detected FT2232H
[ 3578.403219] usb 2-1.3.1: Number of endpoints 2
[ 3578.403226] usb 2-1.3.1: Endpoint 1 MaxPacketSize 512
[ 3578.403234] usb 2-1.3.1: Endpoint 2 MaxPacketSize 512
[ 3578.403240] usb 2-1.3.1: Setting MaxPacketSize 512
[ 3578.403775] usb 2-1.3.1: FTDI USB Serial Device converter now attached to ttyUSB1
jjj@IDPP-1377 ~ $ less /dev/ttyUSB0
/dev/ttyUSB0 is not a regular file (use -f to see it)
jjj@IDPP-1377 ~ $ less -f /dev/ttyUSB0
jjj@IDPP-1377 ~ $ cat /dev/ttyUSB0
^C
jjj@IDPP-1377 ~ $ cat /dev/ttyUSB1

(no output with "screen /dev/ttyUSB0 or ttyUSB1" either)

Can anyone even tell me what the 2 USB serial devices are? Why 2?

[jago25]

ah, I notice more detail now - "Cannot find pty"

So we can't find a pty on either of those serial devices. What now?

[flitjesdev]

Try screen /dev/ttyUSB1 115200

It seems your ttyusb1 is your serial output.