Recently, many people are considering introducing wireless communication technology, especially BLE, when developing IoT devices. However, while BLE has been widely introduced into IoT devices and embedded devices, there are barriers such as Radio Law certification and logo certification. "BLE+USB Entry Pack" developed jointly with Grape System solves these problems. This time, the developer of μC3-BLE Stack will introduce the latest BLE products, talk about market trends, and talk about the hardships of development that can only be heard here.