Archive of initial charts for a modified Lazutin hive with 6 temperature sensors
After 25 April 2017, data were uploaded to emoncms.org to enable use of the scrolling and expansion facility there.
The emoncms.org multigraph visualisation of the data is embedded in this page here.
First 24 hours monitoring
Downoad raw data: journal_27-28_0217.csv
Comments on first 24 hours monitoring
Sensor 3 is clearly in or very near the brood nest, 150 mm below the top-bar cloth. Sensors 4 and 2 are in the same seam as 3 but against opposite walls. Sensor 4 reads warmer than 2 because 4 is just below the top-bar cloth wheras 2 is about 150 mm below the top-bar cloth where it is expected to be cooler. The great variability in sensor 4's trace could be due to movement of bees on the edge of the cluster. Sensor 1 is in an equivalent position to sensor 3, but two bee seams removed from it towars the rear of the hive. The relatively high stability of it suggests that is close to the brood nest, possibly on the opposite side of comb from brood. Sensor 5, the coolest of the in-hive sensors, is several seams away from the brood nest centre. It's trace lags behind that of sensor 6 (ambient) presumably because of the insulation and thermal inertia of the hive structure.
The battery voltage fell a little during the night, then recovered somewhat the following day which was largely overcast with cloud. Thus the solar panel was probably not performing as well as it could.
Download raw data 28 Feb to 7 March 2017: v2_journal_2802-070317.csv
Download raw data 1-8 March 2017: v2_journal_07-080317.csv
Download raw data 8-14 March 2017: v2_journal_8-14_0317.csv
28 March to 4 April data failed to write to micro SD card
11-18 April data failed to write to micro SD card
Intermittent data on 18 & 19 April between micro SD card changes while troubleshooting data loss problem. The following chart has uninterrupted data from 10.39 on 20 April to 17.12 on 21 April. Now two bee seams are up to brood temperature (yellow & blue traces). From this point on at each card change an empty JOURNAL.CSV file is present on the micro SD card when it is inserted.
Email: david (at) dheaf (dot) plus (dot) com
David Heaf's beekeeping pages: www.bee-friendly.co.uk