and [Bertus Kruger] has created a neat way to make lights blink wirelessly. He has a footprint in the middle of the board for soldering the castellated ESP8266 module, and an LED ring around it ...

At first glance, an Arduino library for ... PWM resolution available on the ESP8266, for example. The library can turn an LED on or off (including delays), blink or breathe an LED forever or ...