What Grafana version and what operating system are you using? Grafana v10.4.1 (d3ce857c0e) Debian GNU/Linux 12 (bookworm) Linux 6.6.20+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64 GNU/Linux What are you trying to achieve? I’m trying to build a dashboard for MQTT dat…

Yip if you want real time trending then only MQTT dashboard panels must be used with no refresh of any other panels otherwise any refresh restarts the MQTT panels. Sad but true.

Here’s the log: logger=settings t=2024-04-05T13:25:16.941807153+02:00 level=info msg="Starting Grafana" version=10.4.1 commit=d3ce857c0eb86f571ffa993a9cd8493b6f47b630 branch=HEAD compiled=2024-04-05T13:25:16+02:00 logger=settings t=2024-04-05T13:25:16.94271601+02:00 level=info msg="Config loaded fr…

Looks like this is actually the default behaviour and not related MQTT at all, see link . Quite surprised about that though.

[image] michaelw: Seems like the data is not stored properly. Data stored where?

I was assuming it is stored in the default sqlite DB. But it seems like it is not, this DB is just used for UI settings, dashboards etc. However, I wonder how to use the MQTT plugin reasonably then? If I just see the data received since I opened the dashboard and no historic data it doesn’t make se…

Depends. Mqqt retention etc maybe? So if you ran the same query outside of grafana through some querying tool of mqqt, would you see historical data?

First thanks for trying to help me with this. Didn’t notice the reply though. Unfortunately this is not how MQTT works. I use a so called “MQTT broker” (Mosquitto) and I think the methodology is similar to Apache Kafka. You can publish information via “topics” to send information. To receive inform…

[image] michaelw: But what is the point in the MQTT data source then? How am I supposed to use it properly when data is stored nowhere? well :slight_smile: why did you decide to use mqqt then? see this new thread in case it helps [image] MQTT chart demo Dashboards …

Hi @michaelw , I think the subtle difference is that once a dashboard is saved GRAFANA streams data directly to the panel data buffer which you may readily access and download etc. However as soon as any dashboard change is made and saved the panel data buffer/queue is purged as you note. Below is…

Hi @expoenergy , I could live with the behaviour you describe. But my issue is not even related to changing the dashboard itself. I just navigate to other areas within Grafana and anytime I open the dashboard it is empty again - just collecting the data from the time I opened it and then being initi…

Just to chime in here, when I first set up MQTT with Grafana, I too was disappointed that just closing the dashboard and then coming back would cause the 5 minutes or whatever of history to disappear and then start again. For that reason, today the only panel that I use the MQTT plugin with his the…

MQTT data not stored

Grafana Data Links

yosiasz April 22, 2024, 9:50pm 8

well why did you decide to use mqqt then?

see this new thread in case it helps

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MQTT data not stored

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