nova_strip.ino

#include <FastLED.h>

/**************************************
   U S E R   S E T U P
 **************************************/

#define MAX_LEDS 10          // number of controllable segments (NOT physical LEDs)
#define LED_TYPE WS2811
#define LED_PINS 6
#define COLOR_ORDER BRG

#define BRIGHTNESS 255
#define SERIAL_RATE 115200

#define OFF_TIMEOUT 15000    // ms before auto-off if no data (0 disables)

/**************************************
   L E D   S E T U P
 **************************************/

CRGB leds[MAX_LEDS];

unsigned long lastDataTime = 0;

/**************************************
   S I M P L E   {R,G,B}   P A R S E R
 **************************************/

char buffer[20];
uint8_t bufIndex = 0;
uint16_t currentLed = 0;

void processBlock(char *data) {
  int r, g, b;

  // Parse "{r,g,b}"
  if (sscanf(data, "{%d,%d,%d}", &r, &g, &b) == 3) {
    if (currentLed < MAX_LEDS) {
      leds[currentLed].r = constrain(r, 0, 255);
      leds[currentLed].g = constrain(g, 0, 255);
      leds[currentLed].b = constrain(b, 0, 255);
      currentLed++;
    }
  }
}

void setup() {
  Serial.begin(SERIAL_RATE);

  FastLED.addLeds<LED_TYPE, LED_PINS, COLOR_ORDER>(leds, MAX_LEDS);
  FastLED.setBrightness(BRIGHTNESS);
  FastLED.clear();
  FastLED.show();

  lastDataTime = millis();
}

/**************************************
   M A I N   L O O P
 **************************************/

void loop() {

  // ---- Read serial stream ----
  while (Serial.available()) {
    char c = Serial.read();

    if (c == '{') {                // start new block
      bufIndex = 0;
      buffer[bufIndex++] = c;
    }
    else if (bufIndex > 0) {       // inside block
      buffer[bufIndex++] = c;

      if (c == '}') {              // block finished
        buffer[bufIndex] = '\0';
        processBlock(buffer);
        bufIndex = 0;
      }

      if (bufIndex >= sizeof(buffer) - 1) {
        bufIndex = 0;              // overflow protection
      }
    }
  }

  // ---- When all LEDs updated → show frame ----
  if (currentLed >= MAX_LEDS) {
    FastLED.show();
    currentLed = 0;
    lastDataTime = millis();
  }

  // ---- Optional auto-off if stream stops ----
  if (OFF_TIMEOUT > 0 && millis() - lastDataTime > OFF_TIMEOUT) {
    FastLED.clear();
    FastLED.show();
    lastDataTime = millis();
  }
}