How do I read an array of doubles from arduino to processing?

MitchR — Wed, 28 Feb 2018 03:08:54 +0000

So I have code, which prints out an 8x8 array of doubles into the serial port in Arduino (live updated from sensor). How do I get processing to read these into its own array? I have an array globally defined as

float[][] array = new float[r][c]

where r and c are how many rows and columns there are. How do I turn this into an array that gets live updated from the serial port? If any more info is needed I will be happy to provide it, thanks!.

Transmission of a float through a serial link

jmeuf — Wed, 30 Sep 2015 19:28:48 +0000

Hi everybody,

I am trying to send a float through a USB link between an Arduino and a Processing (ver 3) application.

On the Arduino, I am breaking the float with a union before sending the 4 chars:

`union _UVAL { float f; char c[4]; } uval;

That's the easy part!

Now I am trying to reconstruct the float under Processing knowing that Processing doesn't handle the union, the pointer, the bitwise shift (<<, >>), etc.

As an example, 1.0 is encoded as '63 128 0 0' (or in hexa: 3F 80 00 00). You can check on the IEEE754 web site:

http://www.h-schmidt.net/FloatConverter/IEEE754.html

With the 4 bytes received and coded as chars, can you please provide a way to retrieve the float.

Thank you very much in advance.

Tagged with asfloatbuffer() - Processing 2.x and 3.x Forum

How do I read an array of doubles from arduino to processing?

Transmission of a float through a serial link