Week 11: Exercise

1st Exercise

// Serial port object
let port;

// Latest sensor value
let sensorVal = 0;

function setup() {
  createCanvas(400, 300);
  background(220);

  // Create the serial connection object
  port = createSerial();

  // If a port was used before, auto-reconnect
  let used = usedSerialPorts();
  if (used.length > 0) {
    port.open(used[0], 9600);
  }
}

function draw() {
  background(220);

  // Read one line of text until newline "\n"
  let str = port.readUntil("\n");

  // Make sure we actually received something
  if (str.length > 0) {

    // Convert the string into an integer
    let val = int(str.trim());

    // Map sensor value (0–1023) to screen X position (0–400)
    let x = map(val, 0, 1023, 0, width);

    // Draw a circle at mapped position
    ellipse(x, height / 2, 40, 40);

  } else {

    // If empty data is received, print it for debugging
    console.log("Empty:", str);
  }
}

Arduino  Code:

const int sensor=A2;
int sensorValue;
void setup() {
  // put your setup code here, to run once:
  pinMode(sensor,INPUT);
  Serial.begin(9600);
  // while (Serial.available() <= 0) {
  
    Serial.println(0); // send a starting message
   
  
}



void loop() {
  // put your main code here, to run repeatedly:
sensorValue=analogRead(sensor);
delay(60);
Serial.println(sensorValue);
  
  
}