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 ...

And it would be a good idea to remove the GND copper pour from under the ESP8266 footprint. Posted in Wireless Hacks Tagged ESP-8266, ESP8266, ESP8266-01, FT232RL, pic, PIC18F252, wifi, Wireless ...