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My GSM modem is attached to ttyUSB2 port but I am not able to access the port for AT commands. When I try to access it I get an error as below:

$ sudo minicom
Device /dev/ttyUSB2 is locked.
Zanna
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srg
  • 123

2 Answers2

4

Do ps -ef and see if there is any minicom -s process running.

If there is then kill that process with kill -9 pid where pid is the PID number given in the output of ps -ef. It will solve your problem.

Zanna
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Manoj Surve
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  • 2
1

Read man minicom. It says. in part:

     B - Lock file location
          On most systems This should be /usr/spool/uucp. GNU/Linux systems use /var/lock. If
          this directory does not exist, minicom will not attempt to use lockfiles.

So, look for lock files in /var/lock or /usr/spool/uucp

waltinator
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