It's been a while...
I decided to finally spend the time and fix the data in the main RRD for the temperature logger. At one point digitemp config was re-written and the order of the sensors was skewed.
Before: | After: |
Python to the rescue. A quick script to load the dump up and transpose the sensor readings after the datestamp of the glitch. It looks a lot better now. I may just rip out that fermenter column all together, it has maybe a handfull of sensor readings over the 3 years.