“This temperature corresponds to 0 degrees Fahrenheit, so it was “probably a round, easy number to remember”
That’s what Allouche and team will be working on next, as they build their research summary into a full report, to be published in September 2024. “These findings give good reasons for ‘3 degrees of change’ to be further explored,” Allouche says.
Three Degrees Of Change: Frozen food in a Resilient and Sustainable Food System (PDF)
The freezer has a far simpler ready-made solution, an Acurite or Lacrosse outdoor sensor ($10-20), an RTLSDR dongle ($10) and rtl_433 to put the data on MQTT.
I do my data logging with the free version of Mango Automation SCADA which integrates very well with MQTT and is lightweight and cross platform.
Got a sensor in each of my freezers and my root cellar, rtl_433 also picks up my weather station and rain gauge, wireless buttons, motion sensors and more, rtl_433 is a great addition to any home automation system and cheap and easy to set up.