> Strange. I did just the same application (transmitter only] a > couple weeks > ago without any problem. I calibrated the oscilator by myself > (used 12C508 > with a window), the speed I use is 2400 baud with 1%... I guess YMMV depending on the PIC type, revision, maybe even the production lot, the temperature, Vcc variations, the phase of the moon and whether you have properly waved a dead fish. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads