Just starting out with SmartThings and playing around with handlers.
I have the BASICS of writing/reading code from some C++ courses in first year, but not much past that.
I’m looking to add the functionality described here (display when the sensor was last opened):
First attempt was to take the template of the Z-Wave Door/Window sensor, and add the code bits that used “lastcheckin”. No dice, but not sure where I’ve gone wrong (I did have to figure out I need to change the “runlocally” to false.