1. Arduino Microcontroller Workshop UMBC Institute of Electrical and Electronics Engineers
Arduino UMBC IEEE
Sekar Kulandaivel
Week 2: Communication with Processing
Technical Skills Series Presentation
April 10th, 2014

2. Processing Download: https://processing.org/download/?processing
Why Processing?
Visual feedback
Alternative method of communication
Opens doors for a variety of projects

3. Important Arduino Functions
int val, time; void setup() { … } void loop() { … } Serial.begin(9600); Serial.print(“Hello”); Serial.println(val); delay(1000);
pinMode(8, INPUT);
pinMode(9, OUTPUT);
val = digitalRead(8);
digitalWrite(9, out);
val = analogRead(A0);
analogWrite(9, out);
time = millis();
map(var, testLow, testHigh, mapLow, mapHigh);

4. const int piezoPin = A4; const int photoPin = A5; int incoming, piezoValue, photoValue; void setup() { Serial.begin(9600); while (!Serial) { // do nothing } establishContact();

5. void loop() { if (Serial. available() > 0) { incoming = Serial
void loop() { if (Serial.available() > 0) { incoming = Serial.read(); piezoValue = analogRead(piezoPin) / 4; delay(10); photoValue = analogRead(photoPin) / 4; Serial.write(piezoValue); Serial.write(photoValue); } void establishContact() { while (Serial.available() <= 0) { Serial.print('X'); delay(300);

6. import processing. serial
import processing.serial.*; Serial port; int bgcolor, fgcolor; int[] serialInput = new int[2]; int serialCount = 0; int xpos, ypos, size; boolean contact = false; void setup() { size(400, 400); noStroke(); xpos = 200; ypos = 200; size = 20; String arduino = Serial.list()[0]; port = new Serial(this, arduino, 9600); }

7. void draw() { background(bgcolor); fill(fgcolor); ellipse(xpos, ypos, size, size); }

8. void serialEvent(Serial port) { int incoming = port
void serialEvent(Serial port) { int incoming = port.read(); if (contact == false) { if (incoming == 'X') { port.clear(); contact = true; port.write('X'); } } else { serialInput[serialCount] = incoming; serialCount++; if (serialCount > 1) { size = serialInput[0]; fgcolor = serialInput[1]; println(size + "\t" + fgcolor); serialCount = 0;

9. Piezoelectric Sensor
Analog
Resistors:
1MΩ

10. Photoresistor and Potentiometer

11. Goals for Today
Create a photoresistor array. Create a virtual RGB LED. Create a program that responds to sound. Any more ideas?