Uses HomeSpan to natively control NeoPixel LEDs with HomeKit

Notable features:

• Auto-launches Wi-Fi setup if no Wi-Fi credentials are found
• Over-the-air (OTA) Wi-Fi updates through Arduino IDE
• WebSerial provides serial output through a webpage (http://<IP_ADDRESS>:8080/webserial)
• Control pin to enable Device Configuration mode via momentary button
• Onboard status LED shows Wi-Fi and HomeKit connected status
• Boolean to quickly enable/disable USB serial input

Setup notes:

• You must choose a Partition Scheme that supports OTA but minimizes SPIFFS
  • I'm using "Minimal SPIFFS (1.9MB APP with OTA/190KB SPIFFS)"
  • If WebSerial is too large or isn't needed, it can be removed
• You must disable USB serial input to power the ESP32 with 5V input and not a USB cable
  • HomeSpan will otherwise get stuck in a loop looking for serial input that doesn't exist and then never boot
• Data and Control pins can be changed to other GPIO pins
• HomeKit code can be changed during the Wi-Fi configuration process
  • Default is 466-37-726
• OTA password can be changed through USB serial input in the Arduino IDE
  • Default is "homespan-ota"; send the letter "O" through the serial monitor to change OTA password
  • Don't forget to disable serial input after you're done