Matthew Tice wrote :
Hi, I'm wondering if anyone has been successful setting up and graphing an item that fluctuates between positive and negative values? I'm trying to trend the temperature of my freezer. When I created the rrd earlier today (when positive values were generated) the graph was functional. When I put my sensors inside the freezer (where the temperatures drop a few degrees below zero F) the values wouldn't drop below zero on the graph. I tried modifying the current rrd tool with: rrdtool tune /home/hobbit/data/rrd/tice/freezer.rrd --minimum freezerf:U
Hi,
there's a small bug in hobbitd_rrd 4.2.0 which prevents negative values to be plotted. You have to upgrade to a snapshot or backport a few modifications from do_ncv.c : the "l = val + strspn(val, "0123456789.")" part and the creation arguments of the rrd file.
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