# Starterkit - Project 14 - Tweak the logo - Processing error

**URL:** <https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555>\
**Category:** General Guidance\
**Created:** [December 31, 2024, 12:12pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555 "2024-12-31T12:12:48Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![degenj](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/degenj/32/1127134_2.png) [@degenj](https://forum.arduino.cc/u/degenj)\
**Post date:** [December 31, 2024, 12:12pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/1 "2024-12-31T12:12:48Z")

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Hello all,

The serial monitor works fine.

I have a processing error on import:  
// import the serial library  
import processing.serial.\*;

error Can't find the processing.serial.\* files  
Where I can find those files?

Kind regards Johan

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<div class="post-metadata">

**Author:** ![degenj](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/degenj/32/1127134_2.png) [@degenj](https://forum.arduino.cc/u/degenj)\
**Post date:** [December 31, 2024, 1:54pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/2 "2024-12-31T13:54:14Z")

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A little bit further ....  
Loaded 2nd part of the Project script in the Processing app.  
Then changed the path of the logo to a working/active adress.  
2nd part of the script works fine in the Processing app.  
The Arduino logo is displayed in the app.

So now the 1st Arduino Serial Monitor,  
and the 2nd part Processing app of the script are working seperately.

But they don,t work together yet.  
Look like something with a COM port conflict.  
Arduino Uno connected by USB and Processing COM port seems to work not together. The Processing app don't respond.

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**Author:** ![sonofcy](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sonofcy/32/1283617_2.png) [@sonofcy](https://forum.arduino.cc/u/sonofcy)\
**Post date:** [December 31, 2024, 1:57pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/3 "2024-12-31T13:57:59Z")

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No idea what you are talking about. Post all your code, in code tags, if you have errors post those as well in code tags. Take a picture of your hand drawn wiring diagram.

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<div class="post-metadata">

**Author:** ![degenj](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/degenj/32/1127134_2.png) [@degenj](https://forum.arduino.cc/u/degenj)\
**Post date:** [December 31, 2024, 2:55pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/4 "2024-12-31T14:55:41Z")

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![schema](https://europe1.discourse-cdn.com/arduino/original/4X/7/8/2/782ba94b580b9e14fbae03f9231dca0d23be2603.jpeg)

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<div class="post-metadata">

**Author:** ![TomGeorge](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/tomgeorge/32/215261_2.png) [@TomGeorge](https://forum.arduino.cc/u/TomGeorge)\
**Post date:** [December 31, 2024, 3:05pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/5 "2024-12-31T15:05:35Z")

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> [@degenj](#):
>
> [Tweak\_Arduino\_Logo\_Processsing.ino](https://forum.arduino.cc/uploads/short-url/8U4hHKE63DDIk8ayLklVCJhviic.ino) (480 Bytes)  
> [Tweak-Arduino-Logo.ino](https://forum.arduino.cc/uploads/short-url/j7v0mv5GB6R09KILsTARTOfAeM6.ino) (110 Bytes)

Copy your code in the post with code tags.  
To add code please click this link;

> [@How to get the best out of this forum](https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/679966#posting-code-and-common-code-problems):
>
> See also [FAQ - Arduino Forum](https://forum.arduino.cc/faq) for general rules on forum behavior and etiquette. Hello, Welcome to the Arduino Forum. This guide explains how to get the best out of this forum. Please read and follow the instructions below. Being new here you might think this is having rules for the sake of rules, but that is not the case. If you don’t follow the guidelines all that happens is there is a long exchange of posts while we try to get you to tell us what we need in order to help you, which is frus…

Tom... 😃 👍 ☕ 🇦🇺

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<div class="post-metadata">

**Author:** ![sonofcy](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sonofcy/32/1283617_2.png) [@sonofcy](https://forum.arduino.cc/u/sonofcy)\
**Post date:** [December 31, 2024, 3:13pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/6 "2024-12-31T15:13:26Z")

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We don't do code links, post in code tags.

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<div class="post-metadata">

**Author:** ![degenj](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/degenj/32/1127134_2.png) [@degenj](https://forum.arduino.cc/u/degenj)\
**Post date:** [December 31, 2024, 3:16pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/7 "2024-12-31T15:16:27Z")

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```arduino
//Part1
void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.write(analogRead(A0)/4);
  delay(1);
}

```

```arduino
//Part2
import processing.serial.*;
Serial myPort;
PImage logo;
int bgcolor = 0;

void setup() {
  colorMode(HSB, 255);
  logo = loadImage("http://arduino.cc/logo.png");
  size(logo.width, logo.height);
  println("Available serial ports:");
  println(Serial.list());
  myPort = new Serial(this, Serial.list()[0], 9600);
}

void draw() {
  if (myPort.available() > 0) {
    bgcolor = myPort.read();
    println(bgcolor);
  }
  background(bgcolor, 255, 255);
  image(logo, 0, 0);
}

```

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<div class="post-metadata">

**Author:** ![sonofcy](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sonofcy/32/1283617_2.png) [@sonofcy](https://forum.arduino.cc/u/sonofcy)\
**Post date:** [December 31, 2024, 3:20pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/8 "2024-12-31T15:20:35Z")

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Now the serial monitor output also in code tags. Now all you need is a couple of well formed English (other languages have their own sub-forum) sentences telling us first what was expected, then what actually happened.

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<div class="post-metadata">

**Author:** ![degenj](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/degenj/32/1127134_2.png) [@degenj](https://forum.arduino.cc/u/degenj)\
**Post date:** [December 31, 2024, 4:13pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/9 "2024-12-31T16:13:32Z")

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Thanks for so far.  
Solved the issue was a COM port mismatch  
Both set to COM3 and it works.

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [June 29, 2025, 4:13pm UTC](https://forum.arduino.cc/t/starterkit-project-14-tweak-the-logo-processing-error/1337555/10 "2025-06-29T16:13:38Z")

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