Hi, I am using the Canvas panel to use http or rest to remotely switch a digital relay device. I have managed to succesfully do this using one of the standard elements and then thought I would try to rather use the experimental Element namely BUTTON. I am using a GET call without any authenticam …

Grafana Canvas button can also work with API calls, you can try for example this endpoint to confirm this fact. Most likely your device doesn’t provide necessary headers in response to API request (i.e. Access-Control-Allow-Origin ). At the same time call to your API works fine in Postman, because …

so I captured a fake api call and this is what I see in my browser network tab [image] Do you have documentation for the rest api stack @expoenergy

Ok tried it out and same error. I aalso set CORS to * (accept all) and is still gives the same error! Ok so in browser I get [image] In Grafana using Inbfinity Datasource I get [image] In Canvas Edit Paner I get when I press TEs API [image] From the brower Consol I get [image] This is t…

please clean up that wall of text, it is not readable also you have https://jsonplaceholder.typicode.com/todos/1E& instead of https://jsonplaceholder.typicode.com/todos/1 what is adding the E&

Yes here is the download link e-5773m-11-prus-172.pdf 1910.02 KB Note on the IoT device I set CORS to * which is accept all and it makes no difference? Many thanks for assistance. see page 66

[image] expoenergy: [image] You have extra characters in URL. Correct URL works: [image]

[image] not just * even then, it is dangerous to allow all like that, you need to specify the url of grafana, unless something else also needs access to this endpoint BUt for now test it using „*"

Thanks and yes I am just testing at the moment. No difference? [image]

please post http the payload sent from Postman and compare it to what grafana is sending across the wire. the next step might be contacting the manufacturer of this iot device and ask for tech support.

Hi, I am not using POST only GET. No parameters and no payload required I am just querying the status of the outputs. This same info is returned with the GRAFANA query. It is the Canvas Panel which is the problem. I will contact the provider but the question is why goes and why will it work in …

Canvas panel - button element API

Grafana Data Links

ebabeshko June 23, 2025, 5:09pm 15

You have extra characters in URL. Correct URL works:

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Canvas panel - button element API

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