Install WLED
These next steps require a WebSerial-compatible browser. As of this writing, that means Google Chrome, Microsoft Edge or Opera “desktop” browsers. Other browsers (Safari, Firefox, Explorer and anything mobile) won’t work.
Visit https://install.wled.me/
Plug your microcontroller into your computer with a known good USB cable. Click "Install" and select the port for your board.
Depending on the USB-to-serial bridge chip on the board, you might see one or two serial ports. On Mac, for instance, there might be both “/dev/cu.usbmodem[number]” and “/dev/cu.wchusbserial[number]”. Use the “wchusbserial” one.
After successful installation, enter your WiFi network name and password when prompted. This must be a 2.4 GHz WiFi network; ESP32 does not support 5 GHz networks. If it can’t connect, then as a fallback WLED will create its own 2.4 GHz WiFi access point.
WiFi Setup
It's a good idea to head to WiFi Setup screen and create a good URL so you can control your project from any web-enabled device. I called mine http://spheres.local -- this is what I type into any web browser on my WiFi network in order to connect to my project.
LED Preferences
You need to change just a couple of settings in the app to get the lights running correctly. Click the LED Preferences tab and scroll down to Hardware Setup. Enter the total number of LEDs in your strip under "Length". My strip has 15 rings with 12 pixels each, so, 180 pixels total.
The NeoPixel data pin is connected to pin 12 on the Feather, so make GPIO match that pin number.
Now you can use any computer or handheld device to control your LEDs.
Make sure your device is on the same WiFi network as your board. Navigate to your custom URL (http://spheres.local/ for me) in a web browser. You'll see a color picker above a whole bunch of color palette choices.
Choose a color, choose an effect, and watch your lights animate and glow!
Usage
Save your favorite combinations as presets, create playlists, control the speed and intensity of the animations, and lots more. This web app is incredibly intuitive and easy to use.
Head over to the WLED wiki at https://kno.wled.ge/ to delve into all the particulars.
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