Serial Communication Exercises

Exercise One:

Processing Code:

let serial; // variable to hold an instance of the serialport library
let portName = "/dev/cu.usbmodem14501"; // fill in your serial port name here
let xPos=0;
let yPos=0;
let onOff=0;

function setup() {
  createCanvas(640, 480);
  serial = new p5.SerialPort(); // make a new instance of the serialport library
  serial.on("list", printList); // set a callback function for the serialport list event
  serial.on("connected", serverConnected); // callback for connecting to the server
  serial.on("open", portOpen); // callback for the port opening
  serial.on("data", serialEvent); // callback for when new data arrives
  serial.on("error", serialError); // callback for errors
  serial.on("close", portClose); // callback for the port closing

  serial.list(); // list the serial ports
  serial.open(portName); // open a serial port
}

function draw() {
  background(255);
  ellipse(xPos, yPos, 50, 50); // draw the circle
}

// get the list of ports:
function printList(portList) {
  // portList is an array of serial port names
  for (let i = 0; i < portList.length; i++) {
    // Display the list the console:
    print(i + " " + portList[i]);
  }
}

function serverConnected() {
  print("connected to server.");
}

function portOpen() {
  print("the serial port opened.");
}

function serialEvent() {
  // read a string from the serial port
  // until you get carriage return and newline:
  let inString = serial.readLine();
 
  //check to see that there's actually a string there:
  if (inString.length > 0) {
    let sensors = split(inString, ","); // split the string on the commas
    if (sensors.length== 2) {
      // if there are three elements
      
      xPos = map(sensors[1], 0, 1023, 0, width); // element 0 is the locH
      yPos = height/2; 
      // yPos = map(sensors[1], 550, 250, 0, height); // element 1 is the locV
    }
  }

  serial.write(onOff);
}

function serialError(err) {
  print("Something went wrong with the serial port. " + err);
}

function portClose() {
  print("The serial port closed.");
}

Arduino:

void setup() {
Serial.begin(9600);
while (Serial.available() <= 0) {
Serial.println("0"); // send a starting message
delay(300); // wait 1/3 second
}
}
void loop() {
while (Serial.available() > 0) {
// read the incoming byte:
int inByte = Serial.read();
int sensorValue = analogRead(A0);
Serial.println(sensorValue);
}
}

Exercise Two:

Processing:

let serial; // variable to hold an instance of the serialport library
let portName = "/dev/cu.usbmodem14501"; // fill in your serial port name here
let xPos = 0;
let yPos = 0;
let onOff = 0;

let brightness = 0; 

function setup() {
  createCanvas(640, 480);

  serial = new p5.SerialPort(); // make a new instance of the serialport library
  serial.on("list", printList); // set a callback function for the serialport list event
  serial.on("connected", serverConnected); // callback for connecting to the server
  serial.on("open", portOpen); // callback for the port opening
  serial.on("data", serialEvent); // callback for when new data arrives
  serial.on("error", serialError); // callback for errors
  serial.on("close", portClose); // callback for the port closing

  serial.list(); // list the serial ports
  serial.open(portName); // open a serial port
}

function draw() {
  background(255);
}
  
// get the list of ports:
function printList(portList) {
  // portList is an array of serial port names
  for (let i = 0; i < portList.length; i++) {
    // Display the list the console:
    print(i + " " + portList[i]);
  }
}

function serverConnected() {
  print("connected to server.");
}

function portOpen() {
  print("the serial port opened.");
}

function serialEvent() {
  // read a string from the serial port
  // until you get carriage return and newline:
  let inString = serial.readLine();
  
  brightness = mouseX;
  let mapped = map (brightness, 0, 640, 0, 255);

  serial.write(mapped);
}

function serialError(err) {
  print("Something went wrong with the serial port. " + err);
}

function portClose() {
  print("The serial port closed.");
}

Arduino:

int ledPin = 5;

void setup () {
  Serial.begin(9600);
  pinMode(5, OUTPUT);
  while (Serial.available() <= 0) {
    Serial.println("0,0"); // send a starting message
    delay(300);              // wait 1/3 second
  }
}
void loop() {
  while (Serial.available() > 0) {
    // read the incoming byte:
   int inByte = Serial.read();
    analogWrite(ledPin, inByte);
    Serial.println("0");
  }
}

Exercise Three:

Processing:

let serial; 
let portName = "/dev/cu.usbmodem14401"; 

let velocity;
let gravity;
let position;
let acceleration;
let wind;
let drag = 0.99;
let mass = 50;
let bounce;


let xPos=0;
let yPos=0;
let onOff=0;

// for port connection and handshake 

function setup() {
  createCanvas(640, 360);
  serial = new p5.SerialPort(); // make a new instance of the serialport library
  serial.on("list", printList); // set a callback function for the serialport list event
  serial.on("connected", serverConnected); // callback for connecting to the server
  serial.on("open", portOpen); // callback for the port opening
  serial.on("data", serialEvent); // callback for when new data arrives
  serial.on("error", serialError); // callback for errors
  serial.on("close", portClose); // callback for the port closing
  serial.list(); // list the serial ports
  serial.open(portName); // open a serial port
  
  // get the list of ports:
function printList(portList) {
  // portList is an array of serial port names
  for (let i = 0; i < portList.length; i++) {
    // Display the list the console:
    print(i + " " + portList[i]);
  }
}
function serverConnected() {
  print("connected to server.");
}
function portOpen() {
  print("the serial port opened.");
}
function serialEvent() {
  // read a string from the serial port
  // until you get carriage return and newline:
  let inString = serial.readLine();
  //xPos = map(inString, 0, 1023, 0, width);
 
  //check to see that there's actually a string there:
  if (inString.length > 0) {
    xPos = map(inString, 0, 1023, 0, width);
  }
  serial.write(onOff);
}
function serialError(err) {
  print("Something went wrong with the serial port. " + err);
}
function portClose() {
  print("The serial port closed.");
}
  
  // code for the actual bouncing, wind, etc. 
  
  noFill();
  position = createVector(width/2, 0);
  velocity = createVector(0,0);
  acceleration = createVector(0,0);
  gravity = createVector(0, 0.5*mass);
  wind = createVector(0,0);
  bounce=map (mass,15,80,.80,.80);
}
function draw() {
  background(255);
  if (!keyPressed){
    
    console.log(xPos);
    velocity.x*=bounce;
  }
  
  wind.x = map(xPos, 0, width, -1, 1);
  
  applyForce(wind);
  applyForce(gravity);
  velocity.add(acceleration);
  velocity.mult(drag);
  position.add(velocity);
  acceleration.mult(0);
  fill(255);
  ellipse(position.x,position.y,mass,mass);
  
  
  if (position.y > height-mass/2 - 40) {
    if (velocity.y > 1) {
      serial.write(255);
    }
    
    if (position.y > height-mass/2) {
      velocity.y *= -0.9;  // A little dampening when hitting the bottom
      position.y = height-mass/2;
    }
  }
}
function applyForce(force){
  // Newton's 2nd law: F = M * A
  // or A = F / M
  let f = p5.Vector.div(force, mass);
  acceleration.add(f);
}
function keyPressed(){
  if (keyCode==LEFT_ARROW){
    wind.x=-1;
  }
  if (keyCode==RIGHT_ARROW){
    wind.x=1;
  }
  if (key==' '){
    mass=random(15,80);
    position.y=-mass;
    velocity.mult(0);
  }
}

Arduino:

void setup() {
  Serial.begin(9600);
  pinMode(5, OUTPUT);
  while (Serial.available() <= 0) {
    Serial.println("0,0"); // send a starting message
    delay(300);              // wait 1/3 second
  }
}
void loop() {
  while (Serial.available() > 0) {
    // read the incoming byte:
   int inByte = Serial.read();
   analogWrite(5, inByte);
    int sensorValue = analogRead(A0);
    Serial.print(sensorValue);
    Serial.println();
  }
}