We have installed our Gen2 Rachio in our bathroom which unfortunately has no door between the bathroom and our master bedroom. The blue Rachio logo LED indicator is very bright and lights up the whole bathroom at night.
At first I tried covering it with black electrical tape, which completely blocks out all light from the LED indictor. This was good first solution, but I wanted to sometimes be able to see the status of the Rachio system.
Then I decided to try using white electrical so that some of the light from the LED would pass through but also appear more dimly. I applied multiple layers of tape which certainly dimmed the LED and made it darker in our bathroom/bedroom. It was possible to view the LED read out through the tape, but we decided it was still too bright at night even after adding 3 or 4 layers of white tape.
Finally, I tried 3D modeling a sliding plastic cover that slips across the whole face of the Rachio Gen 2 unit vertically. It covered the LED logo circle area and a little bit more. It can be slid back and forth across the front and expose or cover the LED on demand. I am still making improvements to the design and would love feedback from other users. I will post the Solidworks native file as well as an .STL file for anyone who wants to print it out as is. If you make improvement on your own or have suggested changes, please post them here. or contact me at @jellenbogen on Twitter.
The photos currently included are of an early prototype used for initial designing and checking measurements. The STL and Solidworks files (and 3D model preview) are the latest version as of 7/9/16.