

#include 
#include 
#include 

#define PIN            D2

// When we setup the NeoPixel library, we tell it how many pixels, and which pin to use to send signals.
// Note that for older NeoPixel strips you might need to change the third parameter--see the strandtest
// example for more information on possible values.
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

// https://stackoverflow.com/questions/9072320/split-string-into-string-array
String getValue(String data, char separator, int index)
{
  int found = 0;
  int strIndex[] = {0, -1};
  int maxIndex = data.length()-1;

  for(int i=0; i<=maxIndex && found<=index; i++)
  {
    if(data.charAt(i)==separator || i==maxIndex)
    {
        found++;
        strIndex[0] = strIndex[1]+1;
        strIndex[1] = (i == maxIndex) ? i+1 : i;
    }
  }

  return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
}

// Change RGB LED color
// mosquitto_pub -u test -P test -t "ITT/IOT/3/rgb" -m "51;255;153"
void iot_received(String topic, String msg)
{
  Serial.print("MSG FROM USER callback, topic: ");
  Serial.print(topic);
  Serial.print(" payload: ");
  Serial.println(msg);

  String r = getValue(msg,';',0);
  String g = getValue(msg,';',1);
  String b = getValue(msg,';',2);

  Serial.print("R: ");
  Serial.println(r);

  Serial.print("G: ");
  Serial.println(g);

  Serial.print("B: ");
  Serial.println(b);

  pixels.setPixelColor(0, r.toInt(), g.toInt(), b.toInt()); // Moderately bright green color.

  pixels.show(); // This sends the updated pixel color to the hardware.
}

void iot_connected()
{
  Serial.println("MQTT connected callback");
  iot.subscribe("rgb");
  iot.log("IoT NeoPixel example!");
}

void setup()
{
  Serial.begin(115200);
  Serial.println("Booting");

  iot.printConfig(); // print json config to serial //Peale Serial.begin ja enne iot.setup
  iot.setup();

  pixels.begin(); // This initializes the NeoPixel library.
}

void loop()
{
  iot.handle();
  delay(200);
}