By the spread of IoT (Internet of Things), not only wearable devices but also unwearable things like chopsticks, tooth
brush, and shoes are becoming one of IoT devices. As a method for the IoT prototyping, we can use various prototyping
platform such as Arduous, mbed, and Raspberry Pi.
They are cheap and useful, but there are the following problems
for sensitizing the tiny things. The size of the board is relatively large. In addition, the final deliverables usually
become larger, because the base board requires various additional functions such as a charging circuit, clock, storage.
Moreover, each additional function has a connector.
As a result, it is actually difficult to develop a "smart" sensorized things. Another problem is a software for controlling
the deliverable from a smartphone. It is not easy to develop a sophisticated mobile application for each deliverable respectively.