On Sun, Apr 26, 2009 at 11:05 PM, Isaac Marino Bavaresco wrote: > How about RS-485 ? > Or even half-duplex RS-232 with a diode in each TX output and a > pull-down to V- ? > Or the very inexpensive 433MHz RF modules ? Where can I get the 433MHz modules? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist