Hello ! I'm a bit lost in node-red, maybe I didn't wired the right nodes together... :sweat_smile: The context I'm working with LoRa sensors that send hexa code in the payload. Those datas are specific informations based on the "port" they use : 5 is battery info, 9 is an alive message, 30 is ope…

Have a look here: [image] Use function multiple times General One approach would be to use the global.set() with the memory module. store your function in a global variable: global.set('sum', function(a, b) { return a + b; }, 'memoryOnly'); use your function: ms…

Create 3 subflows for hex2bin, hex2dec & hex2float A subflow is kinda like a reusable function.

If you wanted to you could create just one subflow (that does all three operations) and you specify which operation by topic or by a subflow property. Have a play, see what best suits your needs.

Or a different approach, write them as a JavaScript module and make it available for use in functions through functionGlobalContext, see the configuration documentation

But I didn't find how to do this... And as Node-Red is using the concept of " Function ", it's hard to find answers on Internet for " JS function " ! You can search for javascript hex2bin, you will find something like function hex2bin(hex){ return ("00000000" + (parseInt(hex, 16)).toString(2…

I already have the functions, I just want to know how to reuse them in the whole flow, without copy/paste them. :slight_smile: Like an include, if you prefer.

I'll give a try to a subflow and the functionGlobalContext and let you know. :slight_smile: A lot of reading for this sunday !

Ah ok misunderstood then subflow or functionGlobalContext are good ways to go.

Works well ! I've done a mix with a subflow. :slight_smile: My subflow, called "JS classic function", has an Inject node "trigger-on-start" and 2 functions (hex2bin and hex2dec) wired to it, so it's executed at 0.1s after Node-Red start and the functions are in memory. I just had tyo had my Subfl…

I don't think you need the subflow, since you use it to set the global functions once. I'd use a function node instead.

That is an odd implementation of a subflow, but if it works, it works :wink: "Normally" you would add an input and an output and route your message through the "node" (read subflow).

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Defining and reuse a "classic" JS function

General

cflurin 6 October 2019 07:57 8

Have a look here:

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Defining and reuse a "classic" JS function

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