solarwind wrote: > On Sun, Apr 26, 2009 at 11:00 PM, Bob Blick wrote: >> Are there four wires run throughout the house? Because only two wires >> are used for telephone, you can use the extra pair. Forrest mentioned >> the one-wire network, that's a good start, and you can emulate it with >> any PIC. > > Thanks. I already have the temperature part done. I'm using DS18B20s > (1wire) and they work great. Now the trouble is making a network with > the PICs. I really don't want to run cables through my house so it > either has to be wireless or use something that is already there such > as phone line or 120 V power outlet. And I am suggesting you check to see if your telephone wiring has four wires, in which case two of them are available to use for a 1-wire network with PICs. A 1-wire network needs two wires. -Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist