/*
    Fab Academy 2026 – Individual Assignment: Input Devices
    Board: XIAO ESP32-C3
    Sensor: TCS3472 RGB Color Sensor
    Date: May 15, 2026
*/

#include <Wire.h>
#include "Adafruit_TCS34725.h"

Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_2_4MS,
                                         TCS34725_GAIN_1X);

void setup() {
  Serial.begin(115200);
  Serial.println("\n\n=== TCS3472 Color Sensor Test on XIAO ESP32-C3 ===");

  // GPIO6 = SDA, GPIO7 = SCL
  Wire.begin(6, 7);

  if (!tcs.begin()) {
    Serial.println("ERROR: TCS3472 sensor not found!");
    Serial.println("Check wiring: VCC -> 3.3V, GND -> GND, SDA -> GPIO6, SCL -> GPIO7");
    while (1) delay(1000);
  }
  Serial.println("TCS3472 sensor detected successfully!");

  // Optional: increase gain for low-light conditions
  // tcs.setGain(TCS34725_GAIN_16X);
  // tcs.setIntegrationTime(TCS34725_INTEGRATIONTIME_50MS);
}

void loop() {
  uint16_t r, g, b, c;

  tcs.getRawData(&r, &g, &b, &c);

  uint16_t colorTemp = tcs.calculateColorTemperature(r, g, b);
  uint32_t lux = tcs.calculateLux(r, g, b);

  Serial.println("========== SENSOR READINGS ==========");
  Serial.print("Red   (R): ");   Serial.print(r);   Serial.print("\t");
  Serial.print("Green (G): ");   Serial.print(g);   Serial.print("\t");
  Serial.print("Blue  (B): ");   Serial.print(b);   Serial.print("\t");
  Serial.print("Clear (C): ");   Serial.println(c);
  Serial.print("Color Temperature: "); Serial.print(colorTemp); Serial.println(" K");
  Serial.print("Lux (Illuminance): "); Serial.print(lux); Serial.println(" lx");
  Serial.println();

  delay(1000);
}