Following task to do:
There is a protocol that defines minimalistic data like:
binary 0 1 0 0 0 1 1 1 0 0 1 1 1 0
variable [-] [-----] [---] [-------]
name a b c d
where parameter "a" consists of 2 bits, parameter "b" of 5 bits and so on. I have to set them like
a=1
b=1
c=6
d=...
so the above bit buffer will automatically result.
This stream of bits shall be stored in a buffer like this:
let buf = Buffer.alloc(64, 0);
Is there a possibility to achive this?
There are a number of approaches to this.
Using nodes like the node-red-contrib-buffer-parser which will allow you to do this as part of a flow
Do basic bit shifting in function nodes. e.g.
var a = 1
var b = 16
var c = 2
var d = 10
var answer = a << 14 | b << 12 | c << 10 | d << 6
which can then be written to a buffer.writeUint16()