Hi Guy, I´m a beginner on node-red and I tried get a values from a sample array of number. I tried to use function with a lot of methods inside. my array have the follow format. [array%20format] I need to separate each component of array to do a different data processing. somebody can help me? B…

Note that this is not an Array it is a Buffer, which is not the same thing. However, if you just want individual bytes as numbers then you can access as if it is an array of 8 bit integers. So you can use, for example var x = msg.payload[2] to get element 2. There are a number of questions thou…

Hi Colin, thanks a lot for your support. to complement your questions, I would like to handling all those elements received in the buffer. I need to parser each one element to trigger a new actions. As you advise me , I build an array using msg.payload[n] as you can see bellow: msg.payload = msg.…

I am not certain exactly what you want to do, but I think you will have to use a Function node for that and write some javascript. You can get the length of the array using msg.payload.length and you can, for example, loop through the array with something like var i; for (i = 0; i < msg.payload.…

Hi Colin, thanks a lot! I made this code to test and working well: var i; for (i = 0; i < msg.payload.length; i++) { var a; a= msg.payload[i] if (a==1){ return msg; //(used to see if works) } } right now I need to send a message, via serial port, according for each parameter received using…

[image] aargollo: How can I call a injection in the code to send send a command inside each one object inject? If you call node.send(msg) inside a function then it will send that message and then carry on. So you can loop through your array working out what to do for each one and sending the…

Hi Colin, thanks a lot. I had progress in my parser after you help me! As you see bellow, right now I can handling the parameters responses and send a command using node.send(). //variables var i; for (i = 0; i < msg.payload.length; i++) { // handling parameters and send the response message s…

I can see a slight possible problem with that. The first time it finds msg.payload[i] is 149 then you are overwriting msg.payload with a new buffer, so the next time round the loop it will use the new msg.payload. That will be ok provided you never want to use the original msg.payload again. Even…

Hi Mr Colin, I using buffer to send cmd, via serial, to my exchange device and array to handling responses received and make a specific decision. I have two parts in my code. I building a msg flow according msg received, detect a specific byte and than need to send another msg. Right now is worki…

please see this post which explains how you should be posting a flow in the forum [image] How to share code or flow json FAQs To share code samples or flow json in this forum, you need to take care to format it properly so that it is displayed correctly. The easiest way …

[image] aargollo: I need to building a html page, with button inside, to catch in specific function to send msgs. Do you have an link to suggest me to start to study it? Probably the standard node red dashboard will do what you need. [image] node-red-dashboard A set of dashboard n…

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How can I get array components values

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ukmoose 18 November 2018 07:09 10

please see this post which explains how you
should be posting a flow in the forum

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How can I get array components values

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