Hello, I am working with the node "node-red-contrib-modbustcp" and I am trying to create a server. I know that the server is working because I am connected to it by using a modbus master. The problem is that I need to transform the field payload that you can see remarked in red in the image attache…

Can you post the debug output in text ? Or even better, make a mockup flow that only produces the output. Come to think of it, you can use the csv node to make a comma separated string.

Are you sure you want as a string with embedded values, not as an array for example? Whichever, first have a look at the article on working with messages in the docs, which will show you how to access the components. Then if you do really want it as a string as you have shown then you can use the …

The Modbus Server says this: "msg.payload must be an array of numbers or strings with values between 0:65535". I understand that I need an array but that its composed by strings. [image] Colin: msg.payload = (${msg.payload.BATTERIA},${msg.payload.somethingelse}, ...) So, what do I put in th…

So you want an array of values, not a string containing the values. So in the function node you will need something like msg.payload = [msg.payload.BATTERIA, msg.payload.somethingelse, ...] return msg The square brackets tell it to construct an array containing the values. There are other ways r…

Simpler still, use Object.values(msg.payload). [image] Object.values() The Object.values() method returns an array of a given object's own enumerable property values, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in th…

[image] TotallyInformation: Object.values(msg.payload) I assume that @carlosglez needs them in some specific order, likely not the same as Object.values() will return.

[image] Colin: I assume that @carlosglez needs them in some specific order, likely not the same as Object.values() will return. I think that it returns them in the order found but I might be wrong.

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Transform JSON field to string array

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carlosglez 9 August 2019 10:04 6

ok, thank you! That is exactly what I am looking for.

Regards!

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Transform JSON field to string array

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