Hey guys,

So im working on an indestructables project that is supposed to rune LED lights that change to music from the arduino board using processing to analyze the frequencies of the input. Problem is, i cant seem to get processing to talk directly to ardunio.

I am running StandardFirmata from arduino and when i run a processing script i can see my port 13 LED flicker, but then arduino doesnt run the program. For example, i was trying to get the 13 LED to blink using this code
Code:

import processing.serial.*;
import cc.arduino.*;

Arduino arduino;
int ledPin = 13;

void setup()
{
  println(Arduino.list());
  arduino = new Arduino(this, Arduino.list()[2]); // v2
  //arduino = new Arduino(this, Arduino.list()[2], 115200); // v1
  arduino.pinMode(ledPin, Arduino.OUTPUT);
}

void draw()
{
  arduino.digitalWrite(ledPin, Arduino.HIGH);
  delay(1000);
  arduino.digitalWrite(ledPin, Arduino.LOW);
  delay(1000);
}
 

I am using COM5 on windows vista. I know that COM5 is [2], but they just arent communicating. Any help would be wonderful.
Thanks!

Hmm, I'll try that.I changed the name of my USB serial emulation port to COM5 (from COM4 to see if itd make a difference). I also changed it to a 115200 baud.

println(Arduino.list()); shows

COM1 [0]
COM3 [1]
COM5 [2]

Although I have not been able to connect using COM1 or COM3 using arduino IDE.

Im not positive which version of Firmata i am using, but I only
downloaded the arduino IDE a few months ago.

edit: switched to COM3, no change. And I have firmata v2.1

I tried the examples, no luck. But I did find something odd.

When i run the blink program, while Digital LED 13 doesnt blink, the RX LED on my Arduino Mega blinks at the correct delay that the program suggests. If i change the delay in the processing sketch, then the flashing of the RX LED changes. So i guess that means they are directly communicating, but it still wont run the scripts... any ideas?

What I am using the script for is basicly to make LED pin 13 turn on and off so I can tell that the commands are getting through. The code should simply LED 13 blink, but it hasnt been working.

Im working on a project to make LEDs blink to music, im doing this using Instructables . The problem is when I run the script the LEDs dont turn on/off like they are supposed to. So the blinking script was just a way to test the system, which failed.

Thank you for bearing with me btw, im still new to these systems.

PD : I've noticed that when I make an skecht to turn a digital pin high every 1000 ms, the RX (recieve, right?) led turns blink at that timing... so, the data is reaching the board as I supose...
could it be a problem with the arduino side of the firmata? maybe it' doesn't recognise the pins or something like that?

well... an example could be the same script that ginkin99 wrote in the first post... i'm using com5 ( [1] on my list, its the right because its works on the pwnout example or the digitalinput example)
here is again:
Code:

import processing.serial.*;
import cc.arduino.*;
Arduino arduino;
int ledPin = 13;
void setup(){
  println(Arduino.list());
  arduino = new Arduino(this, Arduino.list()[1]);
  arduino.pinMode(ledPin, Arduino.OUTPUT);
}
void draw(){
  arduino.digitalWrite(ledPin, Arduino.HIGH);
  delay(1000);
  arduino.digitalWrite(ledPin, Arduino.LOW);
  delay(1000);
} 

The question is.. is it a problem with the ... with the design of the mega.. or with our megas in particular somehow?

It looks like it may just be Firmata.
http://www.arduino.cc/cgi-bin/yabb2/num_1247199504.html

By chance have you tried any other Arduino sketches like SimpleDigitalFirmata