RE: Brightness Slider for my Neopixel using ESP8266

Hans — Wed, 01 Jun 2022 09:47:42 +0000

Hi Yanelle,

welcome to the forum 😊

That's quite a bit of code you've got there 😜

Since you're using the NeoPixel Library, you could use the setBrightness function.
This function sets the max brightness for the entire strip, scaling values automatically.
For example:

strip.setBrightness(128);

You could use a global variable for that, and read your "button" the same way you read the buttons to change colors (eg. buttons for brightness up and down).

On that note: you may want to test this with the FastLED library - I found it to be faster, and more mature and feature rich than NeoPixel.

Hope this helps ...

Brightness Slider for my Neopixel using ESP8266

Anonymous — Fri, 27 May 2022 11:29:20 +0000

Hi guys!

I'm working on a smart lamp and would like to add a slider so I can adjust the brightness of my Neopixel lamp.
I already created the slider in HTML and Javascript, but I'm struggling to connect the value of the slider to the Arduino code. I want to be able to connect the values of the slider with the brightness of the Neopixel...

I've used a Soft Access Point for the connection with the Arduino ESP8266. I also already created buttons to change the color and connect a LDR sensor to measure the amount of light and both are working.

This is my code:

const char page_contents[] PROGMEM = R"=====(



    
    
    
    Smart Lamp
    
    
    
    




 Hi, welcome to your 
smartlamp
 It's light outside, turn lights off!




  
  Lamp mode
  
  
     ON
  
    
     OFF
  
   Your light is on! 
  
 
  
 
  Natural light


 
  White light



 
    Color party
     
    
    
    
    
   
    




  
     Intensive 
  

  
      
    

   Let’s slide your brightness 
  

  


)=====";

ARDUINO CODE:

#include 
  #include 
 // #include 
 // #include 
 // #include 
  #include "html_pages.h"
  #include 
  #include 
  //#include 

  
  
  //set your access point network credentials
  const char* ssid = "smartlampjaya4";
  const char* password = "smartlamp2027";
  ESP8266WebServer server(80);
  
  #define PIN 14 
  #define NUMPIXELS 12 
  
  //colors possible for smartlamp
  #define RED 255,24,0
  #define ORANGE 255,163,0
  #define YELLOW 237,255,0
  #define GREEN 14,255,0
  #define BLUE 21,3,255
  #define PINK 255,0,249
  #define NATURAL 242,255,72
  #define WHITE 255,255,255
  #define DELAYVAL 0 // delay for half a second
  #define BRIGHT 500
  #define OFF 0,0,0
  #define KLEUR 242,255,72
 

  int eerste = 255;
  int tweede = 25;
  int derde = 255;
  int brightness= 255;
  int LDR= A0 ;//Set A0(Analog Input) for LDR.
  int input_val=0;
  bool aan = true;

  //http get value
  String header;
  
  String valueString= String(5);
  int pos1= 0;
  int pos2= 0;

//const byte led_pin = 2;
  //int intBrightness = 0;

    /* Set up the LED Pin */
 // ledcAttachPin (led_pin, 0);
  /* Set the initial PWM value, the frequency and the nummer of bits for resolution */
 // ledcSetup(0,5000,8);

  
  // When setting up 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(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
  
  
  void handleRoot(){
    server.send(200, "text/html", page_contents);
  }
  
  void setup()
  {
    Serial.begin(115200);
    
    // We start by connecting to a WiFi network
    Serial.println();
    Serial.println("configuring access point...");
    WiFi.softAP(ssid, password);
    IPAddress IP = WiFi.softAPIP();
    Serial.print("AP IP address: ");
    Serial.println(IP);
    
    server.on("/", handleRoot); 
    server.begin();
    Serial.println("HTTP server started");

    server.on ( "/set_redColor", setRed);
    server.on ( "/set_orangeColor", setOrange);
    server.on ( "/set_greenColor", setGreen);
    server.on ( "/set_blueColor", setBlue);
    server.on ( "/set_pinkColor", setPink);
    server.on ( "/set_naturalColor", setNatural);
    server.on ( "/set_whiteColor", setWhite);
    server.on ( "/set_onMode", setOn);
    server.on ( "/set_offMode", setOff);
  
    pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED) 


    Serial.println();

    
  }
  
  void loop()
  {

     // WiFiClient client = server.available();   // Listen for incoming clients

    server.handleClient();

    input_val = analogRead(LDR);      // Reading Input
   // Serial.print("LDR value is : " );                        
   // Serial.println(input_val);        // Writing input on serial monitor.

        if (header.indexOf("GET /?value=")>=0){
      pos1= header.indexOf("=");
      pos2= header.indexOf("&");
      valueString= header.substring(pos1+1, pos2);
      Serial.println(valueString.toInt());
    }

   
 if(aan) {
   
  if(input_val>300)
    {
      setOff();
      Serial.print("Its Bright, Turn off the LED:");
      aan = true;

  }   

    else
    {
       setOn();
       Serial.print("Its Dark, Turn on the LED:");
       aan = true;
  }     
  }
 }
  
 
 


  void setRed() { 
      server.send ( 200, "text/html", "" ); 
      eerste = 255;
      tweede = 24;
      derde = 0;
      aan =true;
     
      
   
  }

   void setPink() {
    
      server.send ( 200, "text/html", "" ); 
      eerste = 255;
      tweede = 0;
      derde = 249;
        aan =true;
      
 
  }

  void setOrange() {  
     
      server.send ( 200, "text/html", "" );   
      eerste = 255;
      tweede = 163;
      derde = 0;  
        aan =true;
  
  } 
  
  void setGreen() { 
    
      server.send ( 200, "text/html", "" );  
      eerste = 14;
      tweede = 255;
      derde = 0;  
        aan =true;
 

      
  } 

  void setBlue() {  
       
      server.send ( 200, "text/html", "" ); 
      eerste = 21;
      tweede = 3;
      derde = 255;
        aan =true;
  
  } 

  
  void setNatural() {  
      
      server.send ( 200, "text/html", "" ); 
      eerste = 242;
      tweede = 255;
      derde = 72;  
        aan =true;
  }    

  
  void setWhite() {    
         
      server.send ( 200, "text/html", "" );
      eerste = 255;
      tweede = 255;
      derde = 255;
        aan =true;
  }  
 

 void setOn() { 
      pixels.clear(); // Set all pixel colors to 'off'
      for(int i=0; i" ); 
      aan = true;  
  }    
  } 

 void setOff() { 
    pixels.clear(); // Set all pixel colors to 'off'
      for(int i=0; iwindow.location='/';" );  
      aan = false; 
     
  }    
  }

Brightness Slider for my Neopixel using ESP8266 - Arduino

RE: Brightness Slider for my Neopixel using ESP8266

Brightness Slider for my Neopixel using ESP8266

Hi, welcome to your smartlamp

It's light outside, turn lights off!

Lamp mode

Color party

Intensive

Hi, welcome to your
smartlamp