Example for Data Manipulation plugin with Nodered

Hi, I have problems using that plugin in combination with Nodered.

It wouldt be VERY helpful, if an easy example can be provided.

  • What Grafana version and what operating system are you using?

logger=settings t=2023-07-20T09:47:18.285556648+02:00 level=info msg=“Starting Grafana” version=10.0.2

Add-on: Grafana
The open platform for beautiful analytics and monitoring

Add-on version: 9.0.2
You are running the latest version of this add-on.
System: Home Assistant OS 9.5 (aarch64 / raspberrypi4-64)
Home Assistant Core: 2023.3.3
Home Assistant Supervisor: 2023.07.1

  • What are you trying to achieve?

I like to use the Data Manipulation plugin to communicate with Nodered

  • How are you trying to achieve it?

I tried to use an url like http://homeassistant-test.fritz.box:1880/endpoint/grafana with a POST request to address Nodered Node type “http in”

  • What happened?

Getting no data in Nodered

  • What did you expect to happen?

Getting data in Nodered at the /endpoint/grafana

  • Can you copy/paste the configuration(s) that you are having problems with?

  • Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.

seeing 404 in Chrome console

  • Did you follow any online instructions? If so, what is the URL?


1 Like

@guenterms Community members successfully used the Data Manipulation panel with node-red, and we have a blog draft for node-red. I will look into prioritizing it.

The error means that you are making POST requests to /endpoint/grafana, when in the node-red, I see only GET request configured. You need to add a POST request to accept updates.

Thank you!

I’m interested in the blog draft for node-red. Is it available?

In my understanding, the POST requests are generated from the Grafana plugin to address a “http in” node in node-red /endpoint/grafana when the button is pressed. But nothings arrives in node-red. Of course i have to answer a request with a http response WHEN the request arrives. But that’s the problem. Chrome still states 404.

Any idea how to get closer? Anyone has an example with node-red?

Thanx Guenni

I got it!!

You’re right, it must be POST, see screenshot

Another good hint is: Node-RED | Volkov Labs

Thank you!

@guenterms You are right. There is an excellent example in the documentation, which is not complete. I will look into updating it as well.

Hey Mikhail

just a quick (maybe even a stupid) question. Im new to IOT and working with grafana. I need to send data back from grafana to NODE-red. I think i understand most of the stuff but i can’t seem to link them both up by the URLs.

@mohammadbintila, you need to create a POST endpoint in the Node-RED. Check the screenshot above.

Data Manipulation can’t find the POST endpoint on the provided URL.

Have i not? i mean i did change the name to ‘intake’, but i choose method 'POST" and then specified the URL of my Grafana Dashboard.
Is that not how i was suppose to do it? and if not. then can you please guild me through it?