I've never used this module, but i'm going to make some guesses/suggestions based on intuition...

  1. You may have a permissions problem, check what the file permissions are for /dev/ttyS0.
  2. You should follow the examples from the perldocs more closely, it says that you should check new for a true return value, otherwise something may have gone wrong, change it to... 
    $port = new Device::SerialPort ( "/dev/ttyS0") 
      or die "can't open port: $!";

    [download]
  3. I don't know of any perl implimentation that supports a "-W" option, i think you ment to use "-w."

In reply to Re: send command to RS232, then get data from RS232 by hossman
in thread send command to RS232, then get data from RS232 by wee_chang2002

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