How to setup restAPI to receive Webhook push

1

I would like to send a push message via webhook to:

http://192.168.178.143:8080/rest/items/Bewegungsmelder_Reolink_Trigger

Unfortunately it doesn’t work out, so I’m wondering how to configure the RestAPI in openHAB 3.2.

2

There is no configuration for the REST API. It just is and what it provides is what you get.

In OH 3.2 I don’t think there is any option, certainly no official option. There is a REST API but you have to use POST to send a command to an Item and PUT to post and update to an Item. You can get more details in MainUI under Developer Tools API Explorer.

In OH 4 there is a Webhook binding you can install from the marketplace. Webhook HTTP binding

In OH 5 I think they are adding a webhook REST endpoint that lets you send commands or update an Item using HTTP GET.

There used to be an unofficial and unsupported hack using BasicUI, but I don’t remember when that stopped working and since it’s years since I last touched OH 3 I don’t have anywhere to look.

3

Thanks for the quick reply.

I just did a test with API Explorer - this works as expected.

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2025-05-28 19:12:16.355 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'Bewegungsmelder_Reolink_Trigger' received command ON

However, when the Reolink Cam sends the message nothing happens. Is this because there is no Authorization like in API Explorer?

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I thought with this setting, there is no need to authenticate.

Or maybe there is some other workaround…

4

It doesn’t work because the Reolink uses an HTTP GET request. The OH REST API requires an HTTP POST request.

5

Ok, that’s bad.

Is there no other possibility to receive the motion sensor status message?

6

I listed all the options above.

  • Search the forum for the BasicUI hack and see if that still works.

  • Upgrade to OH 4 and use the Webhook add-on.

  • Upgrade to OH 5 and use the new native REST API endpoint that supports HTTP GET requests.

7

Many thanks for your support.