Cache folder/file(s)

Setup, Configuration and Use Beginners
1

Hello,
I’m having issues getting my Tradfri set to work. I had originally experimented with the example settings I found in documentation etc and managed to create my own configurations which seem to work for a while only to somehow “reset” or change overnight. For example, I am now seeing log entries such as:

Cannot delegate command ‘ON’ for item ‘Light_Ceiling’ to handler for channel ‘tradfri:0220:gwb072bf2254e3:tLight:brightness’, because no thing with the UID ‘tradfri:0220:gwb072bf2254e3:tLight’ could be found.
2017-07-09 14:18:54.959 [WARN ] [ome.core.thing.internal.ThingManager] - Cannot delegate update ‘21’ for item ‘Light_Ceiling’ to handler for channel ‘tradfri:0100:mygateway:myDimmableBulb:brightness’, because no thing with the UID ‘tradfri:0100:mygateway:myDimmableBulb’ could be found.

I don’t have myDimmableBulb or mygateway anywhere in my configuration items, sitemap, things etc

I remember the myDimmableBulb being in the example for the Tradfri binding

Is there a way to “reset” or clear whatever cache is holding this information as it seems to confuse OH?

I’m using OpenHAB 2.1

2

That is what the error is saying. You are referring to a channel ID in Light_Ceiling that doesn’t exist. Look in your .items files for a Light_Ceiling Item and make sure the channel ID is correct and look in PaperUI and see if there is a Light_Ceiling Item and make sure that the channel it is linked to is correct.

3

That’s the thing. myDimmableBulb does not exist anywhere and Light_Ceiling is controlling another “thing” now.

None of these exist in my set up

0100-mygateway-myDimmableBulb

I did, however, add them to my default.things while I was experimenting and later removed them from the file as well as the interface and rebooted.

__

4

Since my initial post yesterday, I backed up my settings and ran “apt-get purge openhab2*” then reinstalled and did some basic configuration before restoring my settings and now it’s working fine. However, I still want to know f it’s possible to “clear” whatever cache OH holds these things in as I’m pretty certain I did not have them anywhere in my openhab-config folder.

5

Things that are created by PaperUI or other Admin UIs get saved to the JSONDB. But Things created in .things files do not.

You could try deleting userdata/cache/* and userdata/tmp/* but I don’t think Things are stored in there.