The Breakout Board for Intel Edison does not contain level shifters like the Arduino Board, so most of the I/O signals operate at the native 1.8V level of the Edison Module instead of the jumper-selectable 3.3V and 5V levels that are supported by the Arduino Board. Attaching a 3.3V or 5V sensor output directly to a 1.8V input will not work as expected and may damage the hardware.
You can find the DC specification for the Edison Module GPIOs in Table 28 of the Intel Edison Compute Module Hardware Guide that is available for download at Intel® Edison Boards — Compute Module Hardware Guide. Other helpful documents and guides for Intel Edison hardware and software are available here: Intel® Edison Documents and Guides.
Take a look at this post: Your First Blink- Edison Breakout Board + Arduino IDE. It is about how to run a blink example using the Mini-Breakout Board with some voltage level notes.