Somatosensory interaction - ultrasound
Language | English |
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ObjectiveThis turorial will display a distance that ultrasonic sensor measured in Processing with a curve. Equipment
SchematicProgramRefers to interactionUltrasonic interactionUltrasonicArduino DebugStep 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: Runing the program and put an object in front of the ultrasonic sensor, then observe the Processing's output. ResultScreen will display the distance data curve, as follows: Vidoe |