Challenges and opportunities in designing Internet of Things

User experience becomes an important feature for the success of many products. It is not only about fulfilling the user´s requirement, but also increasing user productivities and the product efficiency. Therefore, one of the ways to create a product with high user experience is to connect it to the internet. Therefore user can access it anywhere, any time with many things. The connected product are not limited to electronics, but including the everyday products such as rice cooker, coffee-maker, refrigerator, water heater, microwave oven, etc. The enabler of this technology is called the Internet of Things (IoT). Accenture predicts through 3^rd party sources that until 2020, the IoT business will reach around $500 billion^[5]. Currently many researches still focus on looking for the IoT suitable platform. Several requirements and constraints have to be considered in designing IoT device, such as interoperability, flexibility, power consumption and re-configurability, as well as the cost. The rapid growth of smartphone application also makes the connection to smartphone a necessity.