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 ...

The ESP8266 WiFi ... to this module and start pushing data up to the Internet. Oh, it’s also being sold for $5 in quantity one. Yes, for five dollars you can blink a LED from the Internet.