ESP8266 project - just the code that gets the data

led-websocket.ino

//Just a section from the websocket code
//Here we are getting the data from the client (browser)

// if new text data is received
case WStype_TEXT:                     
    Serial.printf("[%u] get Text: %s\n", num, payload);
    //my data value starts with a '#'
    if (payload[0] == '#') {           
      // decode dropdown data (base 16, 8 bits)
      uint32_t combinedData = (uint32_t) strtol((const char *) &payload[1], NULL, 16);   
      //4 bits per value, first 4 bits are neopixel position from 0-15
      int pixelPos = ((combinedData >> 4) & 0XF);  
      //last 4 bits are the color from 0-5
      int colorVal = combinedData & 0XF; 
      //activatePixel() is a function I wrote that sets the color based on colorVal and turns the neopixel on
      activatePixel(pixelPos, colorVal);
    }
    break;