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Here is a nice instructable on building a Bluetooth-controlled dual channel relay switch using Atmega328 MCU and a cheap HC-06 Bluetooth module. You can use this device to control various appliances and devices in your home by sending commands through any Bluetooth device.
Bluetooth-controlled relay switch
Microchip has announced the new PIC32 Bluetooth® Audio Development Kit that enables custom application development on the PIC32 microcontrollers (MCUs) for Bluetooth and USB digital audio solutions.
PIC32 Bluetooth Audio Development Kits
The PIC32 Bluetooth Audio Development Kit that ships with audio streaming demo code delivers up to 24-bit, 192 kHz audio and has been tested with over 100 different Bluetooth audio enabled devices, spanning 18 different manufacturers. The Bluetooth Hardware module and the Bluetooth A2DP audio software have been Bluetooth.org certified, saving the developer significant certification costs. The modular design allows developers to swap out the included daughter boards (one for Audio and one for Bluetooth), to create their own custom versions with their preferred audio and wireless solution. The kit also supports USB Host and Device connectivity, Apple® device authentication module interface, a 2-inch color LCD, five general-purpose button switches, 5 LEDs and a Plug-In-Module interface for PIC32 microcontroller upgrades. The PIC32MX450F256 MCU is included which runs at 80 MHz with 256 KB Flash and 64 KB RAM. With such a broad feature-set and flexibility, the kit makes an excellent general purpose development tool.
This instructable describes an Android application named Andruino that can be used to control an Arduino board from an Android phone. It’s both an Android app and an Arduino program, and provides a simple user interface to control Arduino’s digital and PWM, send text commands to Arduino, and receive data from Arduino over Bluetooth serial using the popular and inexpensive HC-05 Bluetooth serial module.
Two way communication between Android and Arduino
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