This is a set of several utilities that allow you to record and graph temperatures from a Dallas DS18S20 compatible sensor over an RS232 serial port. The utilities are:

• readtemp.pl -- diagnostic utility to test sensor readability
• probetemp.pl -- capture temperature readings to a TXT logfile and an RRD file
• gengraphs.sh -- generate PNG graphs from the RRD file
• runbacklog.pl -- rebuild a corrupted RRD file from the TXT logfile

You will need the following prerequisites:

• Perl
• RRDtool