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@BackSpasm ....
All fine and good implementing a freezer monitoring system, but for you to get notification would require that your internet connection is up.....and in the event of a power outage that might not be the case, unless you have some pretty decent UPSs in your house or an automatic switchover to a generator.
I lost a freezer full of deer and moose when the big ice storm killed the whole NorthEast power grid for 5+ days many years ago. Bought a big generator after that. But it's not automatic, so if I was away for an extended period that wouldn't help me. I plan to install a fixed/propane generator that will fire up and switch over automatically one day...but it's many $$$ so I haven't done it yet. Ain't been travelling any since the pandemic lockdown so not a big deal.
I do have a monitoring system running in my house that I custom built/programmed. My smart thermostat uses a Rasberry Pi with a touch screen. I have another Pi which acts as a central gateway and a bunch of battery powered sensors around the house based on Arduino micro-processors that send temp/humidity/pressure/water level data to the gateway. Even have a sensor inside my cigar humidor that tells me when the humidity packs are drying out and need to be recharged!
Been meaning to create a couple more remote temp sensor modules for my freezers to tie into that system, but just haven't had the time.
