Feature Request: Notify me if the twine stops talking to the server. (Heartbeat Montior)
I would like a server side rule that notifies me if the server has not head from my twine for several hours. If my twine looses wifi our something else bad happens, (stolen, dead batteries) without this feature, all the other notification rules can't be trusted.
My guess is that the batteries themselves don't function well in freezing temperatures.
Duracell Procell AAA Alkaline: -20°C to 54°C (-4°F to 130°F)
Energizer Advanced Lithium e2 AAA Lithium: -40 to 140 degrees Fahrenheit
How cold is your freezer. Are you getting condensation? The real issue might be waterproofing to keep the frost from damaging things.
In the freezer now twine seems to be reading a steady 15 degrees. Works form my needs, but probably not accurate.
As for sensing inside freezers, I've posted a solution elsewhere repeatedly - cheap bimetal based thermostat with mercury switch + long wires to break-out board,