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Renaming serial ports in unix

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Operating Systems OS X (Apple) Renaming serial ports in unix
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Old 05-24-2012
Renaming serial ports in unix
Hello everyone, this is my first post and I am by no means a unix expert, so I hope I explain my issue well.

I'm on a mac (mac mini), 10.7.

My question is about serial port names. I have an arduino microcontroller plugged in via usb, and every time the computer is shut down it gives the arduino a new auto-generated name (some variation of tty.usbmodem111 or tty.usbmodem121).

The problem is that I am communicating with my arduino via firmata with an external program where I have set the correct serial port name by hand. So of course, whenever the computer restarts and then renames the serial port that my arduino is on, my program can no longer find it!

So I need to find a way to manage this issue, either by making sure it always names the arduino serial port consistently. Or, maybe a script that can be executed to re-name the serial port to something pre-set. Or any other ideas for dealing with this renaming issue.

I really need to solve this problem, as I will not be able to rename the serial port by hand each time.

Any help would by very greatly appreciated, I really need to solve this issue.

Best,
Erik
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LEARN ABOUT OSF1

dc

dc(7)							 Miscellaneous Information Manual						     dc(7)

NAME

       dc - serial line/mouse/keyboard

SYNOPSIS

       controller   dc0   at ibus0   slot 0   vector dcintr

DESCRIPTION

       The  dc	serial	line controller provides DECstation 2100, DECstation 3100, DECstation 5000, and DECstation 5100 computer systems with key-
       board, mouse, and serial communications interfaces. The serial communications interfaces on the DECstation 2100 and DECstation 3100 provide
       partial	modem  control.  The  serial communications interfaces on the DECstation 5000 provide full modem control.  The device special file
       /dev/tty01 on a DECstation 5100 provides full modem control, while the remaining ports provide no modem control at all.	All serial  commu-
       nications interfaces operate at baud rates from B50 to B9600, excluding B200.

       The  dc	ports  are  used as follows: Usage Graphics device keyboard at 4800 BPS Mouse or tablet at 4800 BPS Communications port 1 (w/modem
       control)/local terminal Communications port 2 (w/modem control)/local terminal

       On all systems except the DECstation 5100, serial port 2 is used for the system console port in server (that is,  non-graphics)	configura-
       tions.  On DECstation 5100s, the serial port labeled 3 on the back of the system is always the system console port.  The serial system con-
       sole port always operates at 9600 BPS, 8-bits, no parity; modem control is not supported.

RESTRICTIONS

       Data communications equipment attached to the console serial port in server configurations must be set to 9600 BPS, 8-bits, no parity.  The
       scc driver enforces this restriction.

FILES

       console terminal local terminal local terminal local terminal (DECstation 5100 only)

RELATED INFORMATION

       console(7), devio(7), tty(7), MAKEDEV(8) delim off

																	     dc(7)