Here is an example circuit:
Bill of materials:
- Adafruit Feather HUZZAH ESP8266
- 74AHCT125 - Quad Level-Shifter
- 470 ohm resistor
- Big Freaking Capacitor - 4700uF
- NeoPixel stick
You will need to edit the sketch to set the number of pixels you have, and your WiFi SSID and password.
Once the sketch is running, you'll need to figure out which IP address it has been assigned. Generally, your router's web interface will have a way to look at DHCP leases, and you can find it from there.