Drive Neopixel 24 ring with Arduino Uno / D1 Mini - ESP8266
Just basic control to test out 24 LED ring. Creates a nice rainbow swirl pattern.
I use D13 for Neopixel data pin.
Additional board manager URL: http://arduino.esp8266.com/stable/package_esp8266com_index.json
On Wemos D1 Mini, pin D7 is 13 for Neopixel data.