The IoT is the network of physical objects or ‘‘things’’ embedded with electronics, software, sensors and network connectivity [3]. These objects do collect or exchange the data. For example, home-automation of LG make people can turn off a light or lock a gas valve remotely [4]. IoT devices are consist of low-power hardware device, lightweight operating system and lightweight software because it should be run under poor environment [5]. Low power devices are being developed by many hardware manufacturer [6]. For example, Raspberry pi is one of most popular IoT hardware device and it consumes electric power from micro-USB. The size of the smallest Raspberry-pi is only 65 mm 9 30 mm 9 5 mm and it can be embedded in a very small space [7].