There is no better way to start learning about home automation and connected gadgets than building your own gadgets. The Intel Edison and Grove IoT Starter Kit is a plug & play kit that allows developers and makers to get started faster. You get an Intel Edison, moisture/light/UV/PIR motion sensors, servo, buzzer, and a few other parts to get started.
The kit supports WiFi and Bluetooth connectivity. Demo codes and proper documentation are also available. You can get this kit for under $170 at this time.