Run flow every 5 minutes

[Daniel Felipe]

Hi guys,

So, Im trying to use the Node Red to get data from my Arduino using MQTT and input the data in a Database.
How can I configure to run the flow every 5 minutes to get the data and input to the database?
Or is this configurable using the MQTT or arduino code?

Thanks.

Daniel

[Zenofmud]

in your Arduino sketch, have the loop run every 5 minutes or what ever. Just add a delsy

# this will delay for 15 minutes

 delay(1000*60*15);

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[Arnaud]

Hello,

For recurrent task, I use the node-red-contrib-cron node (https://flows.nodered.org/node/node-red-contrib-cron). It works perfectly for reccurent flow every minute/5minutes/day/month, etc... like a cron on Linux !

Arnaud

[Mark Setrem]

If you want to do it node-red and you want to initiate a flow every 5 minutes you don't need the node Arnaud suggests.

The "Inject" node which is already included uses cron for the  "interval between times" and "at a specific time" options and has a setting for 5 minutes.  

But personally I'd do this on the arduino

[Mario Bianchi]

Hi Daniel,

The MQTT node "subscribes" to an MQTT source and your flow will be just be called every time there is new data there. You dont need to do anything to collect / read or poll the data.

You can try a very simple flow with one MQTT and a debug node and you will see it is executed every time there new data.

Now if for any other reason you need to rate limit the data every 5 minutes, you can use a delay node that can delay or rate limit your flows.

The other way to rate limit this is to contro this from the publishing device, what is the Arduino in your case.

Good luck !