Here’s a project that uses an ESP8266 LED Wi-Fi controller on Amazon. This little device is an LED controller with an ESP8266 Wi-Fi device inside. It can be reprogrammed to subscribe to the CheerLights MQTT topic on iot.eclipse.org.

CheerLights is an “Internet of Things” project created by Hans Scharler where people volunteer to synchronise their lights all across the world to one colour. In a truly democratic fashion, the colour changes by anyone sending a tweet with a colour + #cheerlights.

Learn how to build your own Wi-Fi controlled potted tree at loads.pickle.me.uk.