On Sat, Jan 22, 2011 at 5:28 PM, Bob Ammerman wr= ote: > Did you write the code on both ends of the link? I did not. On the master side, it is some standard MODBUS control software. On the slave side, I'm using someone else's protocol, but my own code. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .