A little help modifying from template

[Chingyul]

Hi
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):

Door Sensor - display when last opened

I looked around a bit but didn’t find if its possible to display within the Smartthings app when the last time the contact was open. I have this next bit of code that displays the last checkin time, but i want to replace it with the last time opened. tileAttribute(“device.lastCheckin”, key: “SECONDARY_CONTROL”) { attributeState(“default”, label:‘Last Update: ${currentValue}’,icon: “st.Electronics.electronics13”) }

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.

[AlecM]

If you want, take a look at this DTH for the Xiaomi door sensor - it has functionality for a “lastOpened” and “lastOpenedDate” as a secondary control. Note that it also allows you to reset manually and has a date format.

bspranger/Xiaomi/blob/master/devicetypes/bspranger/xiaomi-aqara-door-window-sensor.src/xiaomi-aqara-door-window-sensor.groovy

Note that it has a date format (US vs. UK) in preferences which feeds into the functionality to get current time.