Good morning everybody, i need to read this from "mt-connect": msg.payload.MTConnectStreams.Streams[0].DeviceStream[0].ComponentStream[3].Events[0].e.Variables[0]_ but the string "e:Variables" write in this mode is not correct. Which is the correct syntax? Help me. thanks

There’s a great page in the docs that will explain how to use the debug panel to find the right path to any data item. [image] Working with messages : Node-RED

[image] Mattia.88: e:Variables" "e:variables" is correct. I need only know how to write this into "edit function node". For example: msg.payload.MTConnectStreams.Streams[0].DeviceStream[0].ComponentStream[3].Events[0].+"e:Variables"+[0]._ This mode make an error.

Easy answer - Open the link i posted - it shows you how to get the path to any variable Harder answer - Learn about JavaScript Bracket notation .

[Cattura] I tried to write this: msg.payload.MTConnectStreams.Streams[0].DeviceStream[0].ComponentStream[3].[Events][0].["e:Variables"][0]._; but is not correct!

[image] Mattia.88: but is not correct! The screenshot doesnt match the path because that is an error object. Something you are doing is throwing an error. Show us the debug (expanded) of the REAL message that you are trying to get this "e:Variables" from. Something like this... [2020-11-27…

data.json (11.4 KB) sorry ,the complete path is this

Ok - and? You still get the item path like I have explained... [image] [image]

[image] Steve-Mcl: You still get the item path like I have explained... ["e:Variables"][0]._

[image] Mattia.88: [image] Steve-Mcl: You still get the item path like I have explained... ["e:Variables"][0]._ ???????????? What are you saying? ok, so to save us both some time - here is the answer.... [image] I can not properly help you if you do not read the information I prov…

MT-CONNECT, e.Variables

General

Colin 27 November 2020 10:12 14

That is why it has been suggested numerous times that you read the Working with Messages page and in particular learn how to get the path to a variable by clicking the appropriate button in debug pane, from where you can paste it directly into your function.

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MT-CONNECT, e.Variables

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