Bluetooth Low Energy based motion sensing system

Depending on the application development needs of wireless sensor network technology, a wireless motion sensor node is developed which integrates Bluetooth Low Energy (BLE) technology. This paper describes the overall architecture of the node as well as the hardware and software modules design. A motion sensing system is designed for testing the performance of the motion sensor node. The system can capture 3-axis acceleration data and transmit data by low-power Bluetooth to a PC or a mobile client. The TI single-mode chip CC2540 is used as the communication core chip in this system. Moreover, TI MSP430F5340 and ST LIS3DH are used as the primary controller and the motion sensor. The system consists of a USB dongle communication node and three motion sensor nodes to achieve three motion sensor data while communicating with the USB dongle. The results show that the node is stable with a strong practical value. The system used in the field of physical exercise not only eliminates the physical limitations imposed by hardwired links, but also reduces the height of the system of long-term power consumption.