The Research On Human-computer Interaction Information System Of Wearable Devices

With the popularization of mobile devices such as smart phones and tablet computers,it is a trend that the wearable devices can be interconnected with the intelligent mobile terminal devices through the wireless connection technology.In short distance wireless communication modes between Wearable devices and mobile applications,Bluetooth low Energy(BLE)technology is widely used for low-power,low-cost,open and other advantages.Taking the meteorological monitoring system as an example,this paper proposes a dynamic meteorological monitoring system solution on the iOS platform,which contains a wearable BLE meteorological data acquisition module,an i Phone and a dedicated APP on the mobile phone so that users can view the real-time temperature and humidity and pressure conditions in the current environment such as bedroom,living room,warehouse,garden and so on through the phone,easy to carry,easy to display.The data acquisition module of BLE Meteorological monitoring hardware is powered by Bosch's BME280,a Combined environment sensor of Bosch,it is a high-performance temperature,humidity and pressure sensor.The space-saving package design makes the BME280 ideal for space-constrained mobile devices such as smart phones,tablet PCs and wearable devices,etc.The processor is powered by NORDIC SEMICONDUCTOR's nRF51822,a Bluetooth Low Energy 2.4GHz chip,which is based on an optimized 32-bit ARM Cortex-M0 core processor and includes comprehensive Bluetooth Low Energy profiles and services.This paper studies the technical principle and protocol architecture of Bluetooth Low Energy,introduces several models of Bluetooth wireless communication,realizes the interaction between wearable BLE meteorological monitoring device and intelligent mobile terminal under Bluetooth 4.0 protocol,and the development of meteorological monitoring software on iPhone was completed.When the software on the iPhone scans and finds BLE meteorological equipment which sends data through the Bluetooth 4.0 protocol,it will pair and connect with the device,followed by the reception,analysis,storage and display of meteorological data,at last,the meteorological monitoring software's basic function of iOS platform was achieved,and the main functional modules of the softwareare tested.