/dev/tty.usbserial access

MCS has asked for the wisdom of the Perl Monks concerning the following question:

I have a usb to serial converter and I can't figure out how to access it in perl. I am on OS X and when I plug the usb converter in it creates two devices, /dev/tty.usbserial and /dev/cu.usbserial

The device I want to connect to is a obdII car datalogger. I have the information on what commands to send etc, but I can't figure out how to send and recieve data from it. I'm not even sure which one I should use.

If anyone could provide some guidance I would greatly apreciate it.

Comment on /dev/tty.usbserial access

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Re: /dev/tty.usbserial access by Abigail-II (Bishop) on Jan 14, 2004 at 21:22 UTC
What's your Perl question? To open a file in perl (and /dev/whatever is just a file), use `open`. To write something, use `print` or `syswrite`. The format of the data you need to write (or read) isn't Perl specific. You'd read/write the same thing if you wanted to it in C or Java. Abigail	[reply]
Re: Re: /dev/tty.usbserial access by MCS (Monk) on Jan 14, 2004 at 21:41 UTC
thanks, I wasn't sure if I needed to print to it in a certain way. Also when I tried it initially, I used the /dev/tty.usbserial and it didn't work. Now that you mentioned that's what I needed to do I tried the /dev/cu.usbserial and it works.	[reply]