Anthony Toft wrote: > BTW with the cable unplugged, the voltage is +-8v OK, so you're MAX232 is working correctly. Something is wrong on the other end of the cable. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads