I think you can use setserial /dev/ttyS0 to set the speed and other options on the com port.. I cant remember exactly - also , try this before using the max232 because it seems that gps of yours doesn't need a level converter so if you add a level converter the logic is gonna be inverted which wont work anyway -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Amaury Jacquot Sent: Wednesday, April 14, 2004 11:16 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: connecting a Garmin GPS 16A to a PC serial port Andre Thomas wrote: > Did you check both tx and rx lines? I have found (I think it was a > motorola gsm module) where either the tx or the rx was running at 5v > whilst the other was running 3.3 volt. yeah, the oscilloscope was showing 5v/0v on one cable, and about 50mv to 10mv crosstalk on the other. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body ************************************************************ Scanned by @lantic IS Virus Control Service This message was scanned for viruses and dangerous content. @lantic Internet Services (Pty) Ltd. - http://www.lantic.net eScan for Windows-based PCs - http://www.escan.co.za If you have received a message marked in the subject line as [SPAM] please note that according to our MailScanner, this message has all the attributes of Unsolicited Commercial Email (UCE). If the message has however been marked incorrectly, please send a query to abuse@lantic.net ************************************************************ -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body