JavaScript - lastStateChangeTimestamp and lastStateChangeInstant both return null

Setup, Configuration and Use Scripts & Rules
1

I’ve got an item dbe_thuis_owntracks, which has had state changes and updates:

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image1636×816 11.2 KB

According to the documentation (Item - openHAB JS & JavaScript Scripting - Automation | openHAB), the following should work:

var dbethuisinstant = items["dbe_thuis_owntracks"].lastStateChangeInstant;
var dbethuistimestamp = items["dbe_thuis_owntracks"].lastStateChangeTimestamp;
console.log("dbethuisinstant = "+dbethuisinstant);
console.log("dbethuistimestamp = "+dbethuistimestamp);

The output, however, is null:

17:31:57.794 [INFO ] [enhab.automation.script.ui.scratchpad] - dbethuisinstant = null
17:31:57.795 [INFO ] [enhab.automation.script.ui.scratchpad] - dbethuistimestamp = null

What am I doing wrong?

2

Mmm, the code does work with an item that’s been changed recently. OpenHAB has restarted since the last state change of dbe_thuis_owntracks, so I assume that’s the reason.

Can someone confirm?

3

Yes, but if you have restoreOnStartup for these items, that should restore these timestamps as well if possible.

4

Apparently, that check box is not checked! I wonder why. Is there any reason I might have unchecked it? Is there a drawback to checking it?