Interface and Application Programming

#include < NewPing.h>
#include < SoftwareSerial.h>

/*Config of pins*/
#define TRIGGER_PIN  9
#define ECHO_PIN     8
#define RX_PIN       0
#define TX_PIN       1

/*Create NewPing*/
NewPing sonar(TRIGGER_PIN, ECHO_PIN);
SoftwareSerial mySerial(RX_PIN, TX_PIN);
void setup() {
  mySerial.begin(9600);
  mySerial.println("start");
  
}

void loop() {
 // Wait 1 second between measurements
  delay(1000);
  // Obtener medicion de tiempo de viaje del sonido y guardar en variable uS
  int uS = sonar.ping_median();
  // Print the distance in Serial Monitor
  //Serial.print("Distancia: ");
  // Calulate distance
  mySerial.println(uS / US_ROUNDTRIP_CM);
  //Serial.println("cm");
}

Final Code

	// at the top of the program:
float xPos = 0; // horizontal position of the graph
float yPos = 0; // vertical position of the graph
char weight = 5; // stroke weight
 
import processing.serial.*;
Serial myPort;        // The serial port

color background_color = #EDA430;
color stroke_color = #A8D9A7;
  
void setup () 
{
  size(800, 600);        // (Width, Height) window size
  
  // List all the available serial ports
  println(Serial.list());
  
  String portName = Serial.list()[1];
  myPort = new Serial(this, portName, 9600);
  myPort.bufferUntil('\n');
  background(background_color);
}

//the loop of arduino
void draw () 
{
   // draw the line in a pretty color:
  stroke(stroke_color);
  strokeWeight(2); //change weight of line
  line(xPos, height, xPos, yPos); // (x1,y1,x2,y2) Origin located at top left corner
}
  
void serialEvent (Serial myPort) 
{
  // get the byte:
  //int inByte = myPort.read();
  String inString = myPort.readStringUntil('\n');
  if (inString != null) 
  {
    inString = trim(inString);                // trim off whitespaces.
    int inByte = int(inString);           // convert to a number.

    // at the edge of the window, go back to the beginning:
    if (xPos >= width) 
    {
      xPos = 0;
      background(0);  //Clear the screen.
    } 
    else 
    {
      // increment the horizontal position:
      //xPos++; 
      xPos = xPos+2; //increase x position with the weight stroke
    }
    // print it:
    println(inByte);
    yPos = height - inByte;
  }
}	

Testing interface using ultrasonic sensor from Silvia Lugo on Vimeo.

Files

• Ultrasonic sensor codes