I have a DS18B20 temperature sensor connected to my Pi.
I can see how to set up a trigger, but do not understand how the value change panels for this work. They don’t all change and I cannot understand why. Can somebody pls explain them?
Secondly - what I want to achieve is detection of temperature falling and rising something like this…
Let us assume I’m interested in 15/12/10/5 deg C and I want to know ONCE as it drops past each temperature and then ONCE as it rises through them again.
Can I do that and if so, how?
I did see a similar question for Arduino, but did not fully understand the answer, specifically how to write and upload code.
(Simple Python code is within my capabilities!)