Node-Red Buffers -(Integers and Floats)

[@andresm4668]

Thanks for always save me!
Greetings from Mexico!

[@quaternion-pi]

Thanks for the clear explanations and excellent related references. Very helpful.

[@josephtanner248]

Thanks Steve for these explanations. I love your no frills little examples!
Could you show this with the node-red-contrib-buffer-parser. Especially with a longer string, this node would be clearer.

[@HelloHelloXD]

I just discovered your channel. Great job!

[@edsontouche]

Thanks for help me Steve!

[@milleniazwisabatinasirait1432]

Can I ask a question pls?
how can we do calculations with these buffer numbers according to float or integer type calculations? for example 12.5 : 2 = 6.25, how can we do this in a buffer or can we do it in a function which only consists of converting a float number to a buffer and doing the calculations in a normal way? or do we have to do the calculations in a buffer calculation as well?
and can you give an example sir? thank you 🙏

[@stevecope]

To do the calculation you will need to convert the buffer into a float then do your calculation and convert it back again to a buffer.
Rgds
Steve

[@devendrasongra786]

You explained very gr8.
I am trying to convert buffer [4] to 32 bit float value but it's not done.
Buffer Value is [57,19,67,90] represent as 32 bit float value
Pls tell me how to do or give code for this same 32bit representation
Or
for array [2] to 32 bit value floating reprentation.
Thanks in advance

[@stevecope]

hi
code should be
b=Buffer.from([57,19,67,90]);
output=b.readFloatBE()
output should be the float number
0.00014044102863408625
Is that correct?

[@devendrasongra786]

@@stevecope output should be in like a 3 digit value as 230.3 volt of frequency or different

[@stevecope]

Hi
Is the buffer value you sent me correct? Should that buffer value evaluate to 230.4? Is it BE or LE
rgds
steve

[@devendrasongra786]

@@stevecope
Hi
Now buffer value is [67,162,67,104] or for Array showing [17315, 17256].
In this case Energy Meter voltage showing 232.3 volt 32bit floating value.

[@stevecope]

Hi
Not sure of the question? To convert the buffer into a value use
value=buf.readFloatBE()
I've updated the tutorial on the site with examples at the bottom.
www.steves-internet-guide.com/understanding-buffers-node-red/