He has a footprint in the middle of the board for soldering the castellated ESP8266 module, and an LED ring around it to create the WiFi Pixel. It’s an LED ring that can be controlled over a ...

A lot of people have used ESP8266 to add inexpensive WiFi connectivity to their projects, but [Oscar] decided to take it one step further and program an Arduino over WiFi with the ESP8266. [Oscar] … ...