Hi. I was looking into the single-wire iButtons, and wanted to hook up aprox 100 "reader-stations" spread out over 50,000 square feet, which all funnel down to a single PC via serial port. (Or perhaps a couple serial ports if need be) What I envision is having several pics, each having the capability to provide contacts to read 5-10 iButtons.. Each of these pics would reside on some common bus and eventually stream the data to a PC with a serial port. Each contact station would append a "station-id" to the 64bit serial number that the iButton reports... Has anyone been exposed to a setup like this? Leslie Bester Chief Technical Officer Gallmark Corporation 500-280 Smith St. Winnipeg, MB. R3C 1K2 Contact Specifications: 204-944-1119 (voice office) 204-949-0768 (fax office) 204-933-5164 (pager) 204-229-1082 (cellular) les@gallmark.mb.ca (email) pager@gallmark.mb.ca (email pager) -----BEGIN GEEK CODE BLOCK----- Version: 3.1 dpu(--) s: a- C+++(++++) UL++(++++) P++(+++>) L+++(++++>) E- w++ O M- V PS+ PE Y-- PGP- t@ 5@ X+(++) R(-) tv- b+(++) DI+++ D+ G e h(*) r y+ z ------END GEEK CODE BLOCK------