Serial read() Arduino

Processing Electronics (Arduino, etc.)
6

Please consider the following demo and see if you can adapt it to your project. The demo will send random integers from 255 to 1024 from Arduino followed by a line feed. The Processing code will put the incoming data into a string and break it at the line feed. The resulting string is then reconverted to an integer and printed to the console.

Processing Code:

import processing.serial.*;

Serial myPort;
String inStr;

void setup() {
  surface.setVisible(false);
  printArray(Serial.list());
  // Select port for your system
  myPort= new Serial(this, Serial.list()[4], 9600);
}

void draw() {
}

void serialEvent( Serial myPort) {
  //put the incoming data into a String -
  //the '\n' is delimiter indicating the end of a complete packet
  inStr = myPort.readStringUntil('\n');
  //make sure our data isn't empty before continuing
  if (inStr != null) {
    //trim whitespace and formatting characters (like carriage return)
    inStr = trim(inStr);
    int val = Integer.valueOf(inStr);
    println("value = ", val);
  }
}

Arduino Code:

long randNumber;

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

void loop() {
  // print a random number from 255 to 1024
  randNumber = random(255, 1024);
  Serial.println(randNumber);
  delay(50);
}
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