Serial control of Arduino pins (not reading them, writing them) from Max

Hi Nat,

Thanks for the reply. The Arduino code is in the link in the original post. I'll attach it below, for convenience.

I'm wanting to send the 3 control data bytes from Max rather than from the Arduino IDE serial monitor, as the sketch is set up for (3 binary bytes (0-255) comma or space separated, followed by ASCII 10). My (unsuccessful) Max patch is pasted below. I have no trouble sending the binary bytes successfuly by themselves, but getting them to be followed by the ASCII new line is where I'm getting hung up. Also, I'm not too worried about sending/receiving the data back from Arduino to Max - that part will be discarded as soon as I get the patch working.

Thanks,

Steven

Max patch:

Arduino sketch:

/*
  Reading a serial ASCII-encoded string.

 This sketch demonstrates the Serial parseInt() function.
 It looks for an ASCII string of comma-separated values.
 It parses them into ints, and uses those to fade an RGB LED.

 Circuit: Common-anode RGB LED wired like so:
 * Red cathode: digital pin 3
 * Green cathode: digital pin 5
 * blue cathode: digital pin 6
 * anode: +5V

 created 13 Apr 2012
 by Tom Igoe

 This example code is in the public domain.
 */

// pins for the LEDs:
const int redPin = 3;
const int greenPin = 5;
const int bluePin = 6;

void setup() {
  // initialize serial:
  Serial.begin(9600);
  // make the pins outputs:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT); 

}

void loop() {
  // if there's any serial available, read it:
  while (Serial.available() > 0) {

    // look for the next valid integer in the incoming serial stream:
    int red = Serial.parseInt();
    // do it again:
    int green = Serial.parseInt();
    // do it again:
    int blue = Serial.parseInt(); 

    // look for the newline. That's the end of your
    // sentence:
    if (Serial.read() == 'n') {
      // constrain the values to 0 - 255 and invert
      // if you're using a common-cathode LED, just use "constrain(color, 0, 255);"
      red = 255 - constrain(red, 0, 255);
      green = 255 - constrain(green, 0, 255);
      blue = 255 - constrain(blue, 0, 255);

      // fade the red, green, and blue legs of the LED:
      analogWrite(redPin, red);
      analogWrite(greenPin, green);
      analogWrite(bluePin, blue);

      // print the three numbers in one string as hexadecimal:
      Serial.print(red, HEX);
      Serial.print(green, HEX);
      Serial.println(blue, HEX);
    }
  }
}