ramblings about home PIC networking
Perhaps a mix of wired and wireless, or even IR is best...
If wire can be used - that's best.
But then I2C or SPI - is one more noise immune than another? Do either do more like "differential" in which 2 signals are driven apart and together so the DELTA between the 2 wires is the signal, without regard to ground? (thus avoiding "noise the bumps the voltage in both").
https://www.xs4all.nl/~jwasys/old/diy4.html#irphone
is an interesting idea of carrying a 38KHz IR remote carrier via PHONE LINES, in case they happen to be in two of the rooms you want on your network!
Other tricks could be used - but you need a carrier to go much higher than audio on the audio lines, and of course if you have DSL (which I believe already does this) you can't do it.
Has anyone experience with differential drivers/receivers? Trouble is you need differential voltages - unless you invert the bits +/- then -/+ on the wires, rather than reference to ground.
Should be an interesting discussion to follow.. I'm intersted in the idea of PIC networking too - including such things as IR to detect someone (don't want to turn the TV way up if someone is sleeping), wireless to send from a base to some remote computer to turn it on, maybe the darn basement water sensor, etc. I already have some wireless X10, but not interfaced.