Arduino Duemilanove/Firmata/Processing issue

Forum 2005-2010 (read only) Software Interfacing
1

Hi,

I am trying to read an analog pin from Processing using Firmata (just to be safe).
I connected a voltage divider to pin3 and verified that everything is ok using a different sketch on the arduino (println gives me a reasonable value: 508).

I uploaded the StandardFirmata sketch to the arduino and run it, then I wrote the short processing sketch below (I tried with 115200 and 57600 as port speed, no change).
Arduino.List() gives me a reassuring message:

Stable Library

Native lib Version = RXTX-2.1-7
Java lib Version = RXTX-2.1-7
[0] "COM6"

but then I see just a series of 0s, and no apparent TX/RX led blinking on the arduino. Are there known issues with the duemilanove platform? Or (more possible) am I doing something wrong?

Thanks in advance, and sorry for the trivial question!

edo

Processing code:

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

Arduino arduino;
int pin3_val;

void setup()
{
println(Arduino.list());
arduino = new Arduino(this, Arduino.list()[0], 57600);
}

void draw()
{
pin3_val = (int) arduino.analogRead(3);
println(pin3_val);
delay(1000);
}

2

I found a long thread on the issue(s) Firmata2.1 has with several versions of the arduino board. The beta7 fix just solved the problem (so far!). Thanks to all the contributors to that thread!

edo