Comments on: Serial Communication: Sending Variables to the Arduino

By: Robin Pooley

Robin Pooley — Thu, 01 Sep 2011 10:01:34 +0000

Really great work!
Thank you.

I am looking to build an LED cube and want it to represent activity on my companies system. I want the cubes lights to flicker when a user connects to the site or requests a page and want red LED’s to light up when an error occurs. I will keep you posted as to my progress :-) Thanks again.

By: Nathan

Nathan — Tue, 23 Aug 2011 02:01:18 +0000

I keep getting the error message “cannot convert from String to char[]” for the line char buff[]= “)000000000″; when trying to export as an applet. Any suggestions?

By: Mark

Mark — Wed, 06 Jul 2011 20:07:44 +0000

Thank you very much, I considered that might be the case, As I am still learning the basics, I don’t always understand the aesthetics written into the code! This is very instructional as well.

By: Anthony

Anthony — Wed, 06 Jul 2011 14:42:44 +0000

It’s been a while since I’ve looked at this code, but I believe it adds a bit of easing to the motion of the slider by averaging the current position and the mouse position. If I’m understanding it right, p=thesize-(mouseY-ypos) should work fine to.

By: Mark

Mark — Wed, 06 Jul 2011 12:39:24 +0000

Hi, thanks for your example. Was wondering if you could explain the formula for the p variable. p=(3*p+(thesize-(mouseY-ypos)))/4; I can’t seem to grasp what this is doing!! I know it works, but would like to understand it.

By: Guilherme Martins : RGB Mixer – Processing to Arduino

Guilherme Martins : RGB Mixer – Processing to Arduino — Thu, 22 Jul 2010 15:07:21 +0000

[...] the Processing side, I am using a slider class adapted from anthonymatox.com, and I created 3 instances of this class (I assume you understand the concept of class). The [...]

By: tony

tony — Wed, 23 Sep 2009 18:29:31 +0000

The other code, run on the computer which communicates to the external Arduino board via usb, is scripted in a language called Processing. The language is based on Java and remains quite similar to it, aside from some nice simplifications and many built in functions for working with graphics. The basic structure of the language is the same. You can see more information about it on the Processing site as well as download it for free. Arduino is actually a sister project of Processing and the Arduino language, although built on C is modeled after Processing.

By: Louw H

Louw H — Wed, 23 Sep 2009 09:30:47 +0000

Hi there, I know this sounds stupid, but is that code (not the arduino code – the processing and slider class) written in Java? It looks the same? If not please inform me. BTW, i like your idea very much! Great work!

By: tony

tony — Fri, 29 May 2009 19:16:46 +0000

The problem is on line 38 of the slider class.
I have a little problem with my CMS which will be fixed very soon. The ampersands in my code turn into funny strings. If you just fix that in the conditional statement on line 38 it should work fine. It should look like this

if ((mouseY<=ypos+thesize+10) && (mouseY>=ypos-10)) {

By: The guy that doesn't know any further (ShowgetteR)

The guy that doesn't know any further (ShowgetteR) — Thu, 28 May 2009 19:58:44 +0000

I tried everything, but I always get the same error:

“A web color (such as #ffcc00) must be six digits.”

Below that:

“Bad error line: -2″

I really don’t know how to move on, what am I doing wrong? I just need to send these values quickly, as I just want to regulate 2 motors because I have no Potentiometers left…
Any help would be appretiated.