Design Of A Bluetooth Low Energy Mesh Networks Scheme For Internet Of Things

In recent years,the Internet of Things industry has grown rapidly.It is widely used in smart homes and smart buildings.With the development of the times and the progress of society,the types and number of devices connected to the Internet of Things are increasing.The currently used technologies for implementing the Internet of Things are mainly Zig Bee technology and Wi Fi technology.Although Zig Bee technology has the advantages of low power consumption and convenient networking,due to the low equipment support rate,after the Zig Bee-based networking is completed,special consideration must be given to the production of control terminal.This increased the cost of networking.The popularity of WiFi technology on mobile smart devices has promoted the development of Wi-Fi networking.However,compared with Zig Bee technology,Wi Fi technology increases the power consumption of the device while increasing the communication distance.It also violates the concept of creating an energy-saving and environment-friendly society.How to reduce the cost of networking and power consumption on the premise of ensuring the Internet of Things function has become an important issue that needs to be resolved.This paper focuses on the current mainstream low-energy Bluetooth technology and combines the advantages of Mesh networking to design a low-energy Bluetooth based Mesh networking solution for the Internet of Things.Compared with Zig Bee technology and Wi Fi technology,low-energy Bluetooth technology has a higher support rate.In addition,the everevolving low-energy Bluetooth technology has greatly reduced the power consumption of the device.The realization of wireless mesh networking based on low-energy Bluetooth technology can reduce the overall network power consumption while reducing the cost of networking,which is of important practical significance.The main research results of this paper are as follows:1.A set of networking communication messages is designed,according to traditional wireless communication protocols and low-energy Bluetooth specific communication protocols.So that the control terminal and the device end can parse the messages.2.A new network method is proposed to eliminate the inconvenience of users needing to group by network in the vicinity of all network devices to be networked.With the help of the broadcast relay function,users can easily complete the establishment of the network and achieve self-management of the network.3.A new type of group control method is proposed,using the combination of group and sequence numbers within the group as the intra-group address of the device,and each device can have multiple different intra-group addresses in multiple different groups.In addition,unlike the traditional grouping method,the grouping method described in this scheme can not only realize the entire group of control,but also can achieve the control of a single device in the group.4.The corresponding software of the Android control terminal and device end based on this protocol is designed.Use the Keil MDK ARM u Vision IDE for device end software development and ULINK2 for device end code emulation.Android Studio software is used to develop applications corresponding to the Android mobile phone console.The designed functions mainly include device scanning,network control,and grouping operations.By combining the software and hardware debugging of the mobile phone control terminal and the devices end and using Smart RF Packet Sniffer software for packet capture analysis,the final design of the networking program in this paper can be achieved through the user's smart phone and other mobile smart devices to control the network.Compared to Zig Bee,it requires special console design.The low-energy Bluetooth networking reduces the cost of traditional networking.Compared with the high-power consumption of the Wi-Fi networking,the low-energy Bluetooth networking reduces the power consumption of the device to about 30 m W.