What do I need to use the iButtons?
Ray Dzek created a how to get started with iButton guide at http://www.solarbugs.com/home/ibutton.htm Here is a post from Clay Jackson Right now, I’ve got 3 sensors (DS1822, in the three-lead package, inside an epoxy filled soda straw) at the end of 150′ of Radio Shack “flat” cable, talking to a DS9097U (the U is CRITICAL) with no problems. On the bench, I had another 2 sensors on the end of a 50′ cable (for a total of 5 sensors). When I strung the 50′ cable, I must have crimped a lead, because it now meters “closed” and when it was plugged into the “net”, I got no readings. I also have an HA5 from Point-Six; that I’m gonna play with soon. The code Bruce did is for the 9097U, so that’s why I started there (and, it’s cheaper). The 9097U has all the “passive” pull-up stuff the data sheets talk about (courtesy of a DS2048 inside the DB9); so I’m hoping it will do the trick. Anyway, I’ll keep the list posted as things progress. Bottom line – all I needed was Bruce’s code, a 9097U from Dall
