I previously posted on my first effort building the first complete sensor from OSBSS, a long-term battery powered temperature and relative humidity data logger (revision 09 30 2014), as well as about a week’s worth of data sampling at 1-minute intervals in my office and co-located next to an Onset HOBO U12. Just to test the battery life and clock drift, I’ve left it running since late September until yesterday (December 10, 2014), logging at 1-minute intervals in my office for a period of about 73 days. The sensor and data logger are still functioning normally even at this high resolution of data collection and powered only by AA batteries! The clock appears to have drifted minimally (maybe 5 seconds, although I can’t confirm that). See below!
