Hi all so, first release of node-red-contrib-buffer-parser The name doesnt do it justice :slight_smile: so I will post snippets from the readme below - to try and explain it. Hope its of use to people. About A dynamic Node-RED node to convert values in a buffer or integer array into the many diff…

[image] mikeS7: Should I open an issue on Github Yes please. Could you also take a look in the Devtools console, is there an error or something?

Update (hopefully the last for a while) - V3.1.2 improve scaler operand checking tidy up code improve fan out pin descriptions add missing scaling equation operator validation for == & != Improve port labels fix issue with output pins changing "on cancel" add tooltips for checkboxes clean up conso…

Hi Steve I want to take a buffer (audio) and have Node-RED reduce each sample volume. So I thought - split it - process each byte - join - job done But I need each byte converting to a number to then use the range node to reduce the values down I've tried a few things but can't seem to just conv…

Cancel this (althought still would be nice to know just for intellectual sake as to whether it can convert a buffer length 1 to a number) Much better/easier (following DM prompt by Steve) to control volume another way I've found using amixer sset Master xx% in an exec node sorts me out on my Pi…

Thanks for the buffer-parser. Saving me lots of work. Any ideas on implementing IEEE 754? IEEE 754 - Wikipedia This standard is used in the new Finder 7M Modbus kWh-meters and other modbus devices. For now I use the buffer-parser to combine two 16-bit Modbus registers and to split it up in an int8 …

Hi @ericplan Could you provide a demo flow with your data (provided by an inject node) → buffer parser → you function - i will take a look. Thanks.

Pfff, that's lightning fast.... Thanks. Screenshot and code below. This is for two Modbus registers, but I would like to read 8 adjacent registers in a row. For instance this gives the voltage for L1, L2 ,L3 and average voltage. [Screenshot 2022-06-03 at 15.55.22] [{"id":"a02f30f382ba30f2","type…

[image] I do not have your device that's why i said [image] Steve-Mcl: Could you provide a demo flow with your data (provided by an inject node) → buffer parser → you function To be specific... Set the function to read all of the registers you are interested in Add a debug node after the…

Sorry for that. Here is the corrected flow. After some more reading I doubt my formula is correct. It should be something like this: N.n = (-1)S 2 e’-127 (1.f ) where S is the sign bit, e’ is the first part of the exponent and f is the decimal fraction placed next to 1. Internally the exponent i…

So, the manual you linked to shows an example... [image] This is a 32 bit IEEE 754 float (1 bit sign, 8 bit exponent) Buffer Parser floatBE and floatLE operators are standard Node JS Buffer functions readFloatBE``readFloatBE. From the nodejs buffer docs... Reads a 32-bit, big-endian float fro…

[UPDATED] node-red-contrib-buffer-parser - V3.1.2 - #67 by Steve-Mcl - Share Your Nodes

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