Peter,

Yes, I saw and understood the ROM search function call requirements. I just decided that it would be a better use of my time to plug in the Dallas code than to debug yours. Especially since I had to make many mods to accommodate the long wire active pull-up and pull-down circuitry.

Our system is limited to a max of 5 sensors which must be identified individually by the search routine. We save the IDs in EEPROM so that on power-up, we can tell if the user has changed one or more sensors.