Philips Hue Clone using ESP8266

FiberOpticLamp.ino

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <PubSubClient.h>
#include <Adafruit_NeoPixel.h>

#define PIN D8
Adafruit_NeoPixel strip = Adafruit_NeoPixel(6, PIN, NEO_GRB + NEO_KHZ800);

const char* ssid = "....";
const char* password = "....";
const char* host = "Fountain";
const int relay = 0;
const int LED = 2;

int hue = 0;
float brightness = 0.0;
float saturation = 0.0;

// Update these with values suitable for your network.
IPAddress MQTTserver(192, 168, 1, 155);

#define BUFFER_SIZE 100

WiFiClient wclient;
PubSubClient client(wclient, MQTTserver);


void callback(const MQTT::Publish& pub) {

  uint16_t i, j;

  String myMessage = String(pub.payload_string());
  // handle message arrived
  Serial.print(pub.topic());
  Serial.print(" => ");
  String myTpoic = String(pub.topic());

  if(myTpoic == "Fountain")
  {

    Serial.println(pub.payload_string());

    if(pub.payload_string() == "on")
    {
      hue = 0;
      brightness = 1.0;
      saturation = 0.0;
      
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, strip.HSVColor(hue,saturation,brightness));
    }
    strip.show();
      
    }
    else
    {
      hue = 0;
      brightness = 0.0;
      saturation = 0.0;
      
      for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, strip.HSVColor(hue,saturation,brightness));
    }
    strip.show();
    }

  }
  
  else if(myTpoic == "FountainBrightness")
  {
    Serial.println(pub.payload_string());
    brightness = (myMessage.toFloat())/100;
      for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, strip.HSVColor(hue,saturation,brightness));
    }
    strip.show();
    
  }
  else if(myTpoic == "FountainHue")
  {
    Serial.println(pub.payload_string());
    hue = myMessage.toInt();
      for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, strip.HSVColor(hue,saturation,brightness));
    }
    strip.show();
    
  }
  else if(myTpoic == "FountainSaturation")
  {
    Serial.println(pub.payload_string());
    saturation = (myMessage.toFloat())/100;
      for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, strip.HSVColor(hue,saturation,brightness));
    }
    strip.show();
  }
}

void setup() {
  pinMode(relay, OUTPUT);
  pinMode(LED, OUTPUT);
  Serial.begin(115200);
  Serial.println("Booting");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("Connection Failed! Rebooting...");
    delay(5000);
    ESP.restart();
  }

  // Port defaults to 8266
  // ArduinoOTA.setPort(8266);

  // Hostname defaults to esp8266-[ChipID]
  ArduinoOTA.setHostname(host);

  // No authentication by default
  // ArduinoOTA.setPassword((const char *)"123");

  ArduinoOTA.onStart([]() {
    Serial.println("Start");
  });
  ArduinoOTA.onEnd([]() {
    Serial.println("\nEnd");
  });
  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
  });
  ArduinoOTA.onError([](ota_error_t error) {
    Serial.printf("Error[%u]: ", error);
    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
    else if (error == OTA_END_ERROR) Serial.println("End Failed");
  });
  ArduinoOTA.begin();
  Serial.println("Ready");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  // MQTT callback
  client.set_callback(callback);

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  
}

void loop() {
  ArduinoOTA.handle();
  if (WiFi.status() == WL_CONNECTED) {
    if (!client.connected()) {
      if (client.connect("ESP8266: Fountain")) {
  client.publish("outTopic","hello world");
  client.subscribe("Fountain");
  client.subscribe("FountainHue");
  client.subscribe("FountainSaturation");  
  client.subscribe("FountainBrightness");
      }
    }

    if (client.connected())
      client.loop();
  }
  
//  Serial.println("*");
}

Here is a modified code for saving the previous color and brightness upon turning the lighy off

include <esp8266wifi.h>

include <wificlient.h>

include <esp8266mdns.h>

include <wifiudp.h>

include <pubsubclient.h>

include <adafruit_neopixel.h>

define PIN 4

Adafruit_NeoPixel strip = Adafruit_NeoPixel(4, PIN, NEO_GRB + NEO_KHZ800);

const char* ssid = "....";
const char* password = "...";
const char* host = "officelight"; // the name of your fixture, and the base channel to listen to
IPAddress MQTTserver(192, 168, 1, 99);

/* NO NEED TO CHANGE BENEATH THIS LINE */
int hue = 0;
float brightness = 0.0;
float brightnessold = 1.0;
float saturation = 0.0;

define BUFFER_SIZE 100

WiFiClient wclient;
PubSubClient client(wclient, MQTTserver);

void callback(const MQTT::Publish& pub) {

uint16_t i, j;

currentValues();
String myMessage = String(pub.payload_string());
// handle message arrived
Serial.print(pub.topic());
Serial.print(" => ");
String myTopic = String(pub.topic());

if(myTopic == host)
{

Serial.println(pub.payload_string());

if(pub.payload_string() == "on")
{

  // use this to reset parameters if you want them to always come on bright white. 
  //hue = 0;
  //brightness = 1.0;
  brightness = brightnessold;
  //saturation = 0.0;


  for(i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, HSVColor(hue,saturation,brightness));
  }
  strip.show();

}
else
{
  //hue = 0;
  brightness = 0.0;
  //saturation = 0.0;

  for(i=0; i<strip.numPixels(); i++) {
  strip.setPixelColor(i, HSVColor(hue,saturation,brightness));
}
strip.show();
}

}

else if(myTopic == host+(String)"/brightness")
{ // Brightness up to 100
Serial.println(pub.payload_string());
brightnessold = (myMessage.toFloat())/100;
brightness = brightnessold;
for(i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, HSVColor(hue,saturation,brightness));
}
strip.show();

}
else if(myTopic == host+(String)"/hue")
{ // Hue value 0-360
Serial.println(pub.payload_string());
hue = myMessage.toInt();
for(i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, HSVColor(hue,saturation,brightness));
}
strip.show();

}
else if(myTopic == host+(String)"/saturation")
{ // Saturation value at 0-100
Serial.println(pub.payload_string());
saturation = (myMessage.toFloat())/100;
for(i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, HSVColor(hue,saturation,brightness));
}
strip.show();
}
currentValues();
}

void setup() {
Serial.begin(115200);
Serial.println("Booting");
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println("Connection Failed! Rebooting...");
delay(5000);
ESP.restart();
}

Serial.println("Ready");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());

// MQTT callback
client.set_callback(callback);

strip.begin();
strip.show(); // Initialize all pixels to 'off'

}

void loop() {
if (WiFi.status() == WL_CONNECTED) {
if (!client.connected()) {
if (client.connect("ESP8266: Fountain")) {
client.publish("outTopic",(String)"hello world, I'm "+host);
client.subscribe(host+(String)"/#");
}
}

if (client.connected())
  client.loop();

}

}

// Convert Hue/Saturation/Brightness values to a packed 32-bit RBG color.
// hue must be a float value between 0 and 360
// saturation must be a float value between 0 and 1
// brightness must be a float value between 0 and 1
uint32_t HSVColor(float h, float s, float v) {

h = constrain(h, 0, 360);
s = constrain(s, 0, 1);
v = constrain(v, 0, 1);

int i, b, p, q, t;
float f;

h /= 60.0; // sector 0 to 5
i = floor( h );
f = h - i; // factorial part of h

b = v * 255;
p = v * ( 1 - s ) * 255;
q = v * ( 1 - s * f ) * 255;
t = v * ( 1 - s * ( 1 - f ) ) * 255;

switch( i ) {
case 0:
return strip.Color(b, t, p);
case 1:
return strip.Color(q, b, p);
case 2:
return strip.Color(p, b, t);
case 3:
return strip.Color(p, q, b);
case 4:
return strip.Color(t, p, b);
default:
return strip.Color(b, p, q);
}
}

void currentValues(){
Serial.println("");
Serial.println("Current State");
Serial.print("Hue (0-360):");
Serial.println(hue);
Serial.print("Saturation (0-100 in, 0-1):");
Serial.println(saturation_100);
Serial.print("Brightness (0-100):");
Serial.println(brightness_100);
Serial.println("");
}

Which PubSubClient library are you using for this?