Tilt Sensor Module Breakout - (AD38993)

Description:

This basic tilt switch can be easily used to detect orientation. Inside the can is a ball that makes contact with the pins when the can is upright. Tilt the board and the ball will not touch the pins, therefore not connecting.

There are numerous uses for these basic sensors, but please note that you may need to use some debouncing code, as the sensor is not immune to small vibrations and such.

Reference Link