ESP12-e | NeoPixels
GND    ---> GND
3.3V   ---> +5V
GPIO0  ---> Din

#include <ESP8266WiFi.h>
#include <Adafruit_NeoPixel.h>

#define PIN 0
#define NUMPIXELS 224

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

int individualPixels[NUMPIXELS];
  void allOn(){
      for(uint16_t i=0; i<pixels.numPixels(); i++) {
        individualPixels[i]=1;
        pixels.show();
      }
    }

   for (int i=0; i<sizeof(individualPixels); i++){
    if (individualPixels[i]==1){
      pixels.setPixelColor(i, pixels.Color(red,green,blue)); //Set Neopixel color
    }
    else{
      pixels.setPixelColor(i,pixels.Color(0,0,0));
    }
  }
  pixels.show();