Hello all,

I've been asked to look for a way to communicate between two or more PICs, tentatively 18F series, over the DC power bus which is 9V. We have used TDA5051A modems to interface and commicate over the bus successfully, but like so many electronics applications these days, they want it smaller so the thought is to eliminate the modem and, through software, have the PICs perform as modems in addition to simple I/O. I've been searching Microchip and this forum for hours with no luck. I've come across many standalone modems and some methods for communicating over AC power lines, but nothing for the (9V) DC bus powering the PICs (after being dropped down with a DC/DC converter of course).

Any advice or suggestions are greatly appreciated.


Thank you,

Tony