Hallo,
das syslog meint folgendes immer wieder...
syslog:
Feb 15 13:11:15 raspberrypi p4d: Checking state ...
Feb 15 13:11:15 raspberrypi p4d: Line not open, aborting read
Feb 15 13:11:15 raspberrypi p4d: Warning device not opened, can't read line
Feb 15 13:11:15 raspberrypi p4d: Error reading serial interface, repopen now!
Feb 15 13:11:15 raspberrypi p4d: Error: Opening '/dev/ttyUSB4' failed, errno was (2) 'No such file or directory'
Feb 15 13:11:15 raspberrypi p4d: Retrying in 10 seconds
Feb 15 13:11:25 raspberrypi p4d: Checking state ...
Feb 15 13:11:25 raspberrypi p4d: Line not open, aborting read
Feb 15 13:11:25 raspberrypi p4d: Warning device not opened, can't read line
Feb 15 13:11:25 raspberrypi p4d: Error reading serial interface, repopen now!
Feb 15 13:11:25 raspberrypi p4d: Error: Opening '/dev/ttyUSB4' failed, errno was (2) 'No such file or directory'
Feb 15 13:11:25 raspberrypi p4d: Retrying in 10 seconds
Feb 15 13:11:35 raspberrypi p4d: Checking state ...
Feb 15 13:11:35 raspberrypi p4d: Line not open, aborting read
Feb 15 13:11:35 raspberrypi p4d: Warning device not opened, can't read line
Feb 15 13:11:35 raspberrypi p4d: Error reading serial interface, repopen now!
Feb 15 13:11:35 raspberrypi p4d: Error: Opening '/dev/ttyUSB4' failed, errno was (2) 'No such file or directory'
Feb 15 13:11:35 raspberrypi p4d: Retrying in 10 seconds
Wenn ihr keinen tip habt, setz ich Ihn einfach nochmal neu auf.
Nachtrag fehler gefunden:
mit lsusb findet man nur Geräte die angeschlossen sind.
Befehl cat /dev/tty zeigt dann den richtigen USB an.