The ESP8266 WiFi module is the latest, made interesting because it pretty much doesn’t exist outside China. Why is it cool?

Since then there have been an explosion of awesome projects utilizing the low-cost serial to WiFi module that is the ESP8266. This week’s Hacklet is all about some of the great ESP8266 projects ...

The data is displayed on an OLED display mounted to a PCB. Besides this the button present on the watch can control another ESP8266 Relay module directly through an IoT cloud service called Blynk.” ...