import processing.serial.*;

Serial myPort;

void setup() {
  size(400, 200);

  println(Serial.list());

  myPort = new Serial(this, "/dev/cu.usbmodem1101", 115200);
  myPort.bufferUntil('\n');
}

void draw() {
  background(240);
  fill(0);
  text("Reading serial...", 120, 100);
}

void serialEvent(Serial p) {
  String data = p.readStringUntil('\n');

  if (data != null) {
    data = trim(data);
    println("Received: " + data);
  }
}