Shelly-Binding: NullPointerException when trying to close roller shutter

Add-ons Bindings
1

Hello,
I’m new to openHAB and trying to implement some rule to close my roller shutter using a shelly 2.5.

I use shelly binding and created a thing. I also created an open-close item that works manually.

My test rule looks like this:

rule "Roller Close"
when
    Time cron "0 0/1 * 1/1 * ? *"
then
    Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed.sendCommand(100)
end

When the rule is triggered I get the following error:

An error occurred while calling method 'ThingHandler.handleCommand()' on 'org.openhab.binding.shelly.internal.handler.ShellyRelayHandler@20dd2c': null
java.lang.NullPointerException: null
	at org.openhab.binding.shelly.internal.handler.ShellyBaseHandler.authorizationFailed(ShellyBaseHandler.java:616) ~[?:?]
	at org.openhab.binding.shelly.internal.handler.ShellyBaseHandler.handleCommand(ShellyBaseHandler.java:306) ~[?:?]

I would be very grateful if someone could give me a hint…

2

Is Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed the item name? Did you link the correct channel to an item?

EDIT:

Try:

rule "Roller Close"
when
    Time cron "0 0/1 * 1/1 * ? *"
then
    Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed.sendCommand("100")
end

Or

rule "Roller Close"
when
    Time cron "0 0/1 * 1/1 * ? *"
then

var closed = Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed.state as Number
    Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed.sendCommand(closed)
end
3

Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed is the item, created through PaperUI. It is linked to control.

Unfortunately your suggested code didn’t work either.

4

What is the name of the item?

5

Shellyswitch25UgRolloWc_Roller_RollerControl0Open100Closed is the name, I think.

6

Will need to know the name if it’s going to work in a rule.

Looking back over the topic:

You can control it manually from where? What do you see in the logs when you control it as that should tell you the name.

FYI: Open/Closed items are Contact items, ON/OFF are Switch items, and percentage items are Dimmer type.

7

PaperUI, Control

The item name is correct.

8

Itemtype is Rollershutter

9

Then you have not named the item and that is the default.

Example of a Shelly item using files.

 Switch Shelly_XXXXX1_Relay “Light” {channel=“shelly:shelly25-relay:XXXXX1:relay1#output”}

I really don’t think I can help more as I’m out of time but here is a link that should.
https://community.openhab.org/search?q=shelly%20roller%20shutter

Read thru a few topics and best of luck. I’ll check back later to see how things are going.

10

Thank you so much for helping out.

I found the solution:

sendCommand(DOWN)

11

Please read thru the OH documentation to understand items. I assumed you had done this but I was mistaken.

This could have been resolved much faster with knowledge of how items work in OH.

Check out both links. :wink:

12

I read the documentation, but I was misled:

  1. The stack trace contained authorizationFailed (ShellyBaseHandler.java:616) which made me think that it wasn’t the sendCommand parameter but some other configuration problem. I think instead of a NullPointerException an IllegalArgumentException should be thrown with a corresponding error message.
  2. The automatically generated name of the item led me to use a numerical value.

Sorry for the inconvenience