Evolution in electronics and embedded systems in past decades has made remarkable and vital advancement in electronic world. In this rapid world, people want to save time and live trouble free life; this can be achieved by home automation technique. Thus, makes life simple and fruitful to live. Communication plays major role in today's era. This paper gives the review about the existing technologies in present world. This paper is elegant mixture of android application and embedded system. The paper depicts how serial communication takes place between Bluetooth module and smart phone using android application in home automation.