Hi,
I'm trying to make this sketch move by a digital input from ping))) ultrasonic sensor. No response from the sensor, like dead.
Signal plugged into pin=7

I used this simple sketch (from Processing) and firmata

1. * Mouse 2D.
    *
    * Moving the mouse changes the position and size of each box.
    */
    
   import processing.serial.*; // reference the serial library
   import cc.arduino.*; // reference the arduino library
   Arduino arduino;
    
   void setup()
   {
     size(200, 200);
     noStroke();
     rectMode(CENTER);
    
     println(Serial.list()); // List all the available serial ports:
     arduino = new Arduino(this, Arduino.list()[0], 57600);
     arduino.pinMode(7, Arduino.INPUT);
   }
   
   void draw()
   {  
     background(51);
     fill(255, 204);
     rect(arduino.digitalRead(7), height/2, mouseY/2+10, mouseY/2+10);
     fill(255, 204);
     int inverseX = width-arduino.digitalRead(7);
     int inverseY = height-mouseY;
     rect(inverseX, height/2, (inverseY/2)+10, (inverseY/2)+10);
2. }
   

It used to be "mouseX", instead of "arduino.digitalRead(7)" (I want to use the ping sensor instead of mouseX).
Basically I want to make digital input work (analog-potentiometer etc. works fine).

What am I doing wrong?
Is firmata declared wrongly or digital commands aren't correct?

Thanks!!
M