Recitation 8 – Jackson Pruitt

Image of the completed etch-a-sketch with drawing

Physical setup

Tinkercad schematic 

import processing.serial.*;

String myString = null;
Serial myPort;


int NUM_OF_VALUES = 2;   /** YOU MUST CHANGE THIS ACCORDING TO YOUR PROJECT **/
int[] sensorValues;      /** this array stores values from Arduino **/
float preX;
float preY;


void setup() {
  size(500, 500);
  background(200);
  setupSerial();
 
}


void draw() {
     //map(sensorValues,0,1023,0,255);
  updateSerial();
  printArray(sensorValues);
 // ellipse(sensorValues[0], sensorValues[1], 25, 25);
  
  //float posX = sensorValues[0];
 // float posY = sensorValues[1];
   
float posX =  map(sensorValues[0],0,1023,0,width);
float posY = map(sensorValues[1],0,1023,0,height);
 fill(0);
  line(preX,preY, posX, posY);

  preX = posX;
  preY = posY;
  // use the values like this!
  // sensorValues[0] 



  // add your code

  //
}



void setupSerial() {
  printArray(Serial.list());
  myPort = new Serial(this, Serial.list()[ 9 ], 9600);
  // WARNING!
  // You will definitely get an error here.
  // Change the PORT_INDEX to 0 and try running it again.
  // And then, check the list of the ports,
  // find the port "/dev/cu.usbmodem----" or "/dev/tty.usbmodem----" 
  // and replace PORT_INDEX above with the index number of the port.

  myPort.clear();
  // Throw out the first reading,
  // in case we started reading in the middle of a string from the sender.
  myString = myPort.readStringUntil( 10 );  // 10 = '\n'  Linefeed in ASCII
  myString = null;

  sensorValues = new int[NUM_OF_VALUES];
}



void updateSerial() {
  while (myPort.available() > 0) {
    myString = myPort.readStringUntil( 10 ); // 10 = '\n'  Linefeed in ASCII
    if (myString != null) {
      String[] serialInArray = split(trim(myString), ",");
      if (serialInArray.length == NUM_OF_VALUES) {
        for (int i=0; i<serialInArray.length; i++) {
          sensorValues[i] = int(serialInArray[i]);
        }
      }
    }
  }
}

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensor1 = analogRead(A0);
  int sensor2 = analogRead(A1);
 

  // keep this format
  Serial.print(sensor1);
  Serial.print(“,”);  // put comma between sensor values
  Serial.print(sensor2);
  //Serial.print(“,”);
 
  Serial.println(); // add linefeed after sending the last sensor value

  // too fast communication might cause some latency in Processing
  // this delay resolves the issue.
  delay(100);
}