From Nordic Semiconductor: The world's smallest breakout board compatible BTLE module: Automate your curtains for less than $90 with BluChip!
Ever wanted to automate your curtains and control it from the comfort of an app? Look no further.
The BluChip is the world's smallest breakout board compatible BTLE module. Build your very own Automated Home Curtains with this incredibly tiny breadboard-friendly BLE module!
Check out this easy-to-build automated home curtains tutorial and seamlessly control your curtains with the nRF Connect App.
Automated Home Curtains Instructables
The use of the Nordic NRF51 based Taiyo Yuden BTLE module means the entire package is FCC certified and can be incorporated into commercial products!
Learn more about this awesome DIY project at GitHub
Source: https://devzone.nordicsemi.com/blogs/1202/the-worlds-smallest-breakout-board-compatible-btle/