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#include <Arduino.h> #include <ittiot.h> #include <Adafruit_NeoPixel.h>

#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);

}