Hi Brandon, thanks for that, shall check it out! Should have mention modulation is nice and simple OOK. turn on transmitter for a '1', turn off transmitter for a '0' For this project using 2 different microprocessors. On the master end I have a Mitsubishi M16, and on the slave end a Motorola HC08. Regards and happy holidays :) Peter Mcalpine -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Brandon Irwin Sent: Friday, 21 December 2001 12:50 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [OT]: RF link data encode / decode Here's one... "two-frequency coherent-phase encoding" There's more info in this ("http://www.phrack.org/show.php?p=37&a=6")old issue of phrack. Just curiouse... Are you using a PIC? What type of modulation are you using? Have fun! - end --- Peter Mcalpine wrote: >Hi all, >doing a project at the moment using low power 433MHz >transmitters and in the search for the most robust >format I can get. Data overheads not really a problem >and speed is also not a concern. > >At present I am using manchester encoding at 1000bps >and it seems quite good. > >What other schemes would people recommend I trial? > >Regards and happy holiday season :) >Peter Mcalpine > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. _____________________________________________________________ Get your free email here at http://www.e-ha.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.