>> ...and I was curious why it took 2 I/O pins to do the communicatio=
n.  I thought 1-wire meant only one.  (-:


Lindy, what Dallas senso=
r do you have?
a DS1820 - DS18S20.. use only 1 pin for communication (pl=
us ground and V+).
Note that there are also other Dallas temperature sen=
sors with different protocols, as 2 wire (DS1721) and 3 wire (1620)...=0D
=

You can find an example of 1 wire protocol on TLOGGER.zip (16F84 & DS18=
20) at:

http://www.nexuscomputing.com/picarchive/files.html

There a=
re other examples on the web, I remember.



Marco







=0D
=
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