Batch function with averaging

General
1

Hi,

in Node-RED there is node called "batch" where I can group messages by time interval. But I need to average every field that is received in meantime repeatedly. The problem is when messages are sent randomly (when values are changed). I can't define in advance the count of messages and even the field names.

It is possible to write that batch function with grouping messages and averaging values"

Thank you

2

You could use batch and join to get a msg.payload that has all of the values over your set time in an array that you could then calculate an average from (using a change node and JSONata or using a function node). That has the advantage of only needing core nodes.

If you are happy installing another node, the node-red-contrib-calculate node should do what you want I think.

3

node-red-contrib-calculate working perfectly ! thank you

4

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