#include <Adafruit_NeoPixel.h>

// NeoPixel configuration for Seeed XIAO RP2040
#define NEOPIXEL_PIN D10      // Built-in NeoPixel is on D10
#define NUM_PIXELS 5          // XIAO has 1 built-in NeoPixel

// Create NeoPixel object
Adafruit_NeoPixel pixel(NUM_PIXELS, NEOPIXEL_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // Initialize serial communication
  Serial.begin(9600);
  
  // Initialize NeoPixel
  pixel.begin();
  pixel.setBrightness(50);   // Set brightness to 50 (0-255) to save eyes
  pixel.show();              // Initialize all pixels to off
  
  Serial.println("RGB NeoPixel Control Ready");
  Serial.println("Rotate potentiometer to change color");
  Serial.println("Value (0-10) -> Color");
}

void loop() {
  // Read analog input on A0 (GPIO26 on XIAO RP2040)
  int sensorValue = analogRead(A1);
  
  // Map 0-1023 to 0-10 range
  int val = map(sensorValue, 0, 1023, 0, 65536*7/8);

  // Print to serial monitor
  Serial.print("Sensor: ");
  Serial.print(sensorValue);
  Serial.print(" | Mapped: ");
  Serial.println(val);
  
  // Set NeoPixel color based on mapped value
  uint32_t color = pixel.ColorHSV(val);

  for(uint16_t i=0; i<NUM_PIXELS; i++) {
    pixel.setPixelColor(i, color);
    pixel.show();
  }
  
  delay(50);  // Small delay for stability
}