Mr Al:
This
https://www.thermoworks.com/products/alarm/rt8100.html is the thermometer I have.
The LED alert only shows for an hour. The LCD alert shows continuously.
The freezer is located in the basement in a way that's its hard to see if the door is open.
There is actually a 16 cuft freezer next to a 1950's refrigerator/freezer, so one probe is on each.
So, in a perfect world, it would be nice if I got an SMS as a door prop alarm. I investigated the door prop alarm. Too expensive for now.
No kids! But the latch is simple. If somehow the door wasn't shut properly because some food was sticking out too far, I'll know. If something fell and propped open the door, it would be open a small amount.
I had two instances this summer that required defrosting the freezer because the door was open. Not good at all.
I have two long-term plans:
1) A possible SMS from a door prop alarm. This probably won't happen.
2) an SMS from an over temperature alarm. I'd have to figure out how to tap into the LED signal on the fridge alarm.
3) Just turn on a light if overtemp occurred.
4) What actually seems the EASYIEST is to mount a "grabber catch" on the freezer. e.g. One of these:
**broken link removed**
They come in 3, 5 and 10 lb pull forces. I got a 5 lb. I'll mount with double-stick tape. One on a flat Aluminum plate and another on an angle bracket.
Then I will use that to actually turn on a light, that really needs to be on anyway, so I kill two birds with one stone. Door prop could happen in a future iteration. So, could interfacing the freezer alarm.
Light on with the door open is higher on the priority list although I approached it from lots of angles. It may be possible to send an alarm from a UPS which isn't installed yet. It has inpus for water/temperature contact closures and can be network connected. Priorities are all over the place.
You blink an eye and the week is GONE!