How to get Presence Sensor Last activity data into app?

🚧 Developers
1

Working on a new app and need to have the 'Last Activity At' data brought in and then made into usable data. I have no idea how to do this! :sunglasses:

What I need from this data is to know how long someone has been 'Present'.

Basically what I want to do is:

If presenceSensor has been Present for less than 10 minutes
.... Do this
else
.... Do that

Could anyone help me out with an outline on how to code this?

Thanks

2

Are you trying to write your own app in groovy, or would a RM rule do what you want?

One rule to turn on a virtual switch when someone comes home, then turn it off 10 minutes later. Another rule to say when virtual switch is on do this, else do that.

3

No, needs to be in Groovy (which is why I posted in Developers and not RM :wink:)

Just need to know how to

  1. get that data into the app
  2. turn the data into how many minutes someone has been Present

Thanks

4

Update: I've think I've figured out how to go about getting the difference between two dates. Thanks to ST forums. :roll_eyes: lol

Still need an example of getting the 'Last Activity At' data into the app. Pretty please! :grin:

5

One way to do it is to simply have your App subscribe to the presence events from the various sensors. When the App is notified of a change in presence, have it store the Date/Time into a State Variable. That way you always have the latest time that it changed without having to interrogate the device.

6

Thanks, will have to do some research on how to do that.

Was hoping there was a simple one liner. Something like...

def s = presenceSensor1.currentValue("date")

7

There very well may be. Hopefully someone with more App development experience will chime in with the answer.

1 Like
8

Have you tried using the following?

deviceName.getLastActivity()

Where “deviceName” is your device object reference.

https://docs.smartthings.com/en/latest/ref-docs/device-ref.html#getlastactivity

2 Likes
9

First test looks very good. I should be able to work with that! I've been digging this whole time too on the 'other' board.

Thank you very much!

1 Like
10

Just to close out my first post. This is what I ended up doing.

def lastActivity = presenceSensor1.getLastActivity()
			
		    LOGDEBUG("lastActivity: ${lastActivity}")
    		long timeDiff
   			def now = new Date()
    		def prev = Date.parse("yyy-MM-dd HH:mm:ss","${lastActivity}".replace("+00:00","+0000"))
    		long unxNow = now.getTime()
    		long unxPrev = prev.getTime()
    
    		unxNow = unxNow/1000
    		unxPrev = unxPrev/1000
    
    		timeDiff = Math.abs(unxNow-unxPrev)
    		timeDiff = Math.round(timeDiff/60)
			def delay1ms = delay1 * 1000
    
			LOGDEBUG("timeDiff: ${timeDiff}")
1 Like
11

Last activity could be a nice way to quickly look at devices that are possibly offline. A nice visual quick glance. Green for online, Yellow to indicate offline for x period, and Red for period expired, device is offline.

1 Like