>I am trying to read a serial port after sending a command to a device. The
>data coming back has been read by various methods (most garnered off
>examples on this list). The problem is that it works most of the times, but
>every 5th, or 10th, or 20th read (it varies), I get extraneous characters,
>first couple of characters missed, or just plain jibberish.

I would suspect the serial cable going into your Mac. The Mac is not RS-232.

Peter           mailto:peter@...