Research And Implementation Of Key Technologies Of Smart Campus Card

With the rapid development of the Internet of Things,IoT related technologies have been applied to various fields,such as smart home,intelligent transportation,and smart logistics,all of which are applications of Internet of Things technology.This also includes the construction of a smart campus,and both domestic and international are actively promoting the construction of a smart campus.The smart campus system is mainly divided into four parts: cloud computing platform,teaching terminal,base station and smart campus card.These four parts cooperate with each other.The teaching terminal sends commands to the smart campus card through the base station,and the smart campus card feeds the message back to the cloud platform,and the cloud platform and the teaching terminal data share,thereby constructing an interconnected and interactive smart campus platform.The smart campus card is mainly divided into three layers: the application layer,the core layer and the application layer.The core implementation of the core layer of the smart campus,including the Chinese character support module,communication module and power management module.The first is the Chinese character support technology.According to the application requirements and storage space of the smart campus card,the appropriate font library is selected.Due to the limited storage space,the font library is tailored,and the mapping table is used in the cutting,so that the font library can still be accessed normally after the cropping,and Convert the cropped font into a program that can be directly programmed by the program.Secondly,the communication module is based on the low-power Bluetooth protocol and communicates by broadcasting.The smart campus card adopts several different working modes,such as regular mode,attendance mode,answer mode and short message mode,to process broadcast messages of different services.Finally,the power management module,for different application scenarios,the smart campus card design multiple power consumption strategies: intra-campus idle mode,off-campus mode and power-saving mode,these three modes will automatically switch according to the scene,which can effectively reduce power consumption.Improve the battery life of smart campus cards.