Difference between revisions of "Somatosensory interaction - ultrasound"

Objective

This tutorial will display a distance that ultrasonic sensor measured in Processing with a curve.

Equipment

• Microduino-Core
• Microduino-FT232R
• Other equipment
  • USB cable one
  • Ultrasonic sensor one
  • The magnet one
  • 330Ω resistor one
  • Bread one
  • Breadboard Jumper onebox

Schematic

Program

Refers to interactionUltrasonic interactionUltrasonicArduino

Debug

Step 1: Set up hardware system, as follows:

Step 2: Explain the code:

This example needs two parts code, one is Processing and the other is Microduino.

Microduino:

//Calculate the distance and output to serial for Processing's display.

 void loop()
 {
   digitalWrite(TrigPin, LOW);
   delayMicroseconds(2);
   digitalWrite(TrigPin, HIGH);
   delayMicroseconds(10);
   digitalWrite(TrigPin, LOW);
 
   cm = pulseIn(EchoPin, HIGH) / 58.0; //Echo time will be converted into cm
   cm = (int(cm * 100.0)) / 100.0; //Two decimal places
   Serial.println(cm);
   delay(100);
 }

Processing:

//Get the the first serial data, // is always my Arduino, so I open Serial.list()[0]. // Open whatever port is the one you're using.

 myPort = new Serial(this, Serial.list()[0], 9600);
 myPort.bufferUntil('\n'); // Trigger a SerialEvent on new line

//Use the curve to display the data that Microduino sent using the curve and mark the table scale

 void draw() {
   background(255);
   // Draw lines connecting all points
   for (int i = 0; i < vals.length-1; i++) {
     stroke(0);
     strokeWeight(1);
     line(i, vals[i], i+1, vals[i+1]);
   }
   // Slide everything down in the array
   for (int i = 0; i < vals.length-1; i++) {
     vals[i] = vals[i+1];
   }
   // Add a new random value
   //vals[vals.length-1] = random(height);
   String val = myPort.readStringUntil('\n');
   if (val != null) {
     val = trim(val);
     println(val);
     cm=Float.parseFloat(val);
   }
   vals[vals.length-1] = 200-cm;
   //Display scale
   text ( "200-", 370, 10); 
   text ( "--", 370, 50); 
   text ( "100-", 370, 100);
   text ( "--", 370, 150); 
   text ( "0-", 370, 200); 
   //show current num
   text ( cm, 0, 10);
 }

Step 3: Compile the code and download it.

Step 4: Running the program and put an object in front of the ultrasonic sensor, then observe the Processing's output.

Result

Screen will display the distance data curve, as follows:

Vidoe