// Week 11 — TCS34725 color sensor on XIAO ESP32-C3 (I2C)
// Default I2C on XIAO ESP32-C3: SDA = D4, SCL = D5
// Library: Adafruit TCS34725

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

Adafruit_TCS34725 tcs = Adafruit_TCS34725(
  TCS34725_INTEGRATIONTIME_50MS,
  TCS34725_GAIN_4X
);

void setup() {
  Serial.begin(115200);
  Wire.begin();  // SDA/SCL per board default pins

  if (!tcs.begin()) {
    Serial.println(F("TCS34725 not found — check I2C wiring"));
    while (1) delay(1000);
  }
  Serial.println(F("TCS34725 ready"));
}

void loop() {
  uint16_t r, g, b, c;
  tcs.getRawData(&r, &g, &b, &c);

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

  Serial.print(F("R: ")); Serial.print(r);
  Serial.print(F("  G: ")); Serial.print(g);
  Serial.print(F("  B: ")); Serial.print(b);
  Serial.print(F("  Clear: ")); Serial.print(c);
  Serial.print(F("  Lux: ")); Serial.print(lux);
  Serial.print(F("  K: ")); Serial.println(colorTemp);

  delay(500);
}