The main purpose of this project is to build a cost-effective sensor node that can be used for local automation control. The sensor node will acquire sensor data, such as temperature and humidity readings, and provide a connectivity interface to a mobile device that can not only be used to read that data but also, perhaps more importantly, allow the end user to then control and manage the device. In order to make the project as scalable as possible for you, we will use generic sensors and controls through simple, low-cost LEDs. You can replace the LEDs with any control mechanism that you desire, such as relays, motors, or switches with additional hardware adjustments. By the end of this project, you'll have an Android-controlled, connected sensor node that can be easily scaled for nearly any application.
Let's now look at our hardware...