Audio-RGB-LED case for ESP8266 module

You can download the 3D-Model of the case @cults3d.com - Download Link.

What do I need for a audio responsive LED strip?*

LED strip
Microphone
Alternative Link
ESP8266-12F WLAN Module
Alternative Link
Powerbank
USB-Kabel A auf Micro-USB
Jumper wires female
Soldering iron
Wire stripper
3D-Printed Housing

First Step - Soldering**

Soldering the individual modules including installation in the 3D-printed housing.

After the hardware is ready, let’s start with the software.

Installation of the ESP8266 module

Step 01

Download and install Arduino IDE - Download Link.

Step 02

Insall the ESP8266 module in Arduino IDE by following the instructions in the gallery underneath.

http://arduino.esp8266.com/stable/package_esp8266com_index.json

Go to: File -> Preferences

Copy & Paste URL from Tutorial

Go to: Tools -> Bords Manager

Install ESP8266

Choose: NodeMCU 1.0

Step 03

Install the fast LED library. This library is responsible for different color animations like RainbowColors_p; or LavaColors_p;
You can download the *.zip file on github - Download Link.
To add the library choose Sketch -> Include Library -> Add .ZIP Library/…

Step 04

Include the code and customize the LED strip.
With the instruction in the /////// you can customize the ammount of LEDs, the speed and colour scheme of the strip.

#include <FastLED.h>
#include "arduinoFFT.h"

#define LED_PIN     3
 ///////////////////////////////////////////////////////////////
 //CHOOSE THE NUMBER OF LEDS DEPENDING ON THE LED STRIPE U USE//
 //If YOU SHORTEN THE STRIP - ADJUST THE NEW NUMBER            //
 ///////////////////////////////////////////////////////////////
#define NUM_LEDS    60
#define BRIGHTNESS  64
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define NUM_SAMPLES 256
#define UPDATES_PER_SECOND 100

arduinoFFT FFT = arduinoFFT();

double real[NUM_SAMPLES];
double imag[NUM_SAMPLES];
uint16_t i = 0;

uint32_t us_last = 0;

CRGBPalette16 currentPalette;
TBlendType    currentBlending;

void setup() {
  // put your setup code here, to run once:
  delay( 3000 ); // power-up safety delay
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness(  BRIGHTNESS );

  pinMode(A0, INPUT);
  Serial.begin(9600);

  memset(real, NUM_SAMPLES, 0);
  memset(imag, NUM_SAMPLES, 0);

 ////////////////////////////////////////////////////////////////
 //CHOOSE BETWEEN DIFFERENT ANIMATIONS UNDER >currentPalette = //
 // RainbowColors_p;                                           //
 // RainbowStripeColors_p;                                     //
 // CloudColors_p;                                             //
 // OceanColors_p;                                             //
 // LavaColors_p;                                              //
 // ForestColors_p;                                            //
 // PartyColors_p;                                             //
 // myRedWhiteBluePalette_p;                                   //
 ////////////////////////////////////////////////////////////////

  currentPalette =  RainbowColors_p;
  currentBlending = LINEARBLEND;

void loop() {
  // put your main code here, to run repeatedly:

  //samples aufnehmen
  if (micros() - us_last >= 100) {
    us_last = micros();
    real[i] = static_cast<double>(analogRead(A0));
    imag[i] = 0;
    i++;
  }

  //wenn genug samples gesammelt wurden
  if (i == NUM_SAMPLES) {
    i = 0;

    //FFT auf das array
    FFT.Windowing(real, NUM_SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
    FFT.Compute(real, imag, NUM_SAMPLES, FFT_FORWARD);
    FFT.ComplexToMagnitude(real, imag, NUM_SAMPLES);

    //256 samples, davon die ersten 128 nutzbar
    //sample 0 nicht benutzen (=DC)
    //60 leds = 2x 30 LEDS
    // --> samples 4 - 123 (=120 samples) / 30 = 4 samples / LED
    double led_values[30];
    for (uint8_t j = 0; j < 30; j++) {
      led_values[j] = 0.0;
      for (uint8_t k = 0; k < 4; k++)
        led_values[j] += real[j * 4 + k + 4];
    }

 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //THE NUMBER AFTER MILLIS IS RESPONSIBLE FOR THE SPEED OF THE ANIMATION - THE HIGHER THE NUMBER, THE SLOWER THE ANIMATION//
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  uint8_t start_index = static_cast<uint8_t>((millis() / 40) & 0xFF);

    //skalieren auf 0...255 und rausschreiben an die leds
    for (uint8_t j = 0; j < 30; j++) {
      led_values[j] = led_values[j] / 4095.0 * 255.0;

 ////////////////////////////////////////////////////////////////////////////////////////////////////////
 //AFTER, j * >CHOOSE A NUMBER BETWEEN 1-10< THE HIGHER THE NUMBER, THE MORE YOU CAN SEE OF THE RAINBOW//
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //ADAPT THE NUMBER OF LEDS TO THE TOTAL NUMBER OF LEDS - IF 60 LEDS, YOU HAVE TO USE >leds[30 + j] and [29 - j]< //
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
      //raussschreiben an die leds
      leds[30 + j] = ColorFromPalette( currentPalette, j * 5 + start_index, led_values[j], currentBlending);
      leds[29 - j] = ColorFromPalette( currentPalette, j * 5 + start_index, led_values[j], currentBlending);    
}
      for (uint8_t j = 0; j < 30; j++) {
      leds[30 + j] = ColorFromPalette( currentPalette, j * 5 + start_index, BRIGHTNESS, currentBlending);
      leds[29 - j] = ColorFromPalette( currentPalette, j * 5 + start_index, BRIGHTNESS, currentBlending);
      j += 1;
    }
    FastLED.show();
  }
}

Step 05

Upload the code to your ESP8266.
Make sure the correct usb port is selected.
You can change the port @ Tools -> Port -> COM1, COM2, Com3, …

Special thanks

goes to coding master @wergor for the support!
And @Dosi the soldering master.

Feedback

Feel free to comment below or visit us on Instagram @omg.designlab and @2rmin_com.

*The linked products are affiliated links - if you buy via these links on Amazon, we get a small commission. For you, nothing changes in the price.
**The entire project is at your own risk. We are not responsible for any damage.