Enclosure for the ESP8266-based Witty Cloud module. Hole for USB to power device, a hole on tha back to hang the box on a screw and holes for the light sensor and RGB LED.
You might want to add the plastic opal lenses to make it neat.

https://www.tindie.com/products/ICStation/esp8266-wifi-witty-cloud-development-board8154/

http://www.schatenseite.de/en/2016/04/22/esp8266-witty-cloud-module/