Arduino Photoresistor and Processing sketch

Projects General Guidance
1

Using the following Processing sketch with a photoresistor connected to an Arduino board :

import processing.serial.*;
Serial port;
float brightness;

void setup() {
 size(1000, 1000); // Set the window size
 port = new Serial(this, "COM4", 9600); // Initialize the serial port
 port.bufferUntil('\n'); // Read until a newline character is received
}

void draw() {
 background(255, 0, brightness); // Update the window background color
}

void serialEvent(Serial get) {
 String inString = get.readStringUntil('\n'); // Read the incoming value as a string
 if (inString != null) {
   inString = trim(inString); // Remove any whitespace characters
   brightness = float(inString); // Convert the string to a float value
   brightness = map(brightness, 0, 1023, 0, 255); // Map the brightness value to the range 0-255
 }
}

I am supposed to see the Processing sketch to read the values and change the color on the screen. However, neither of these is happening despite the photoresist working. I have an LED connected in series which will dim accordingly if I cover the photoresistor.

3

"Connected" gives no information. How it's connected would do. Please grab pen, paper and draw a schematics showing the devices involved, and the powering.

4

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