As the carrier of the connection between users and products in the Internet of Things, the mobile Internet is very big. We usually have car networking, smart home, city management and so on. Today, let's take the example of car networking, how it implements the communication technology architecture between them. Cars connect you and me, create a new way of playing 1. Project introduction Initially, the way to charge new car owners can only be charged by using a recharge card. It is not particularly convenient to find a pile. It is necessary to develop an APP that can solve this series of problems. The charging pile project shared this time solves the problem that the user finds the pile difficult and the charging is cumbersome. The nearby charging station can be found through the map navigation in the APP, and the usage status and charging information of all charging piles in the charging station can be checked in real time in the APP. The designated charging post can be reserved in advance. The owner of the vehicle finds the position of the corresponding pile through the map navigation. After the gun is inserted, the remote control is turned on in the APP, and the operable and visualized application experience solves the primary problem of the new energy vehicle owner charging and finding the pile. 2, technical realization â— Determine the communication method of the smart device First of all, we need to determine the communication mode supported by the charging pile device. APICloud supports a variety of IoT modes, such as socket communication through the socketManager module, Bluetooth communication through the ble module, and third-party wit cloud gizWifiSDK module and Qingke mico. In this project, the operator's charging pile equipment uses socket to communicate with the internal server end of the charging pile manufacturer. â— Identify business processes Each IoT device has corresponding business processes for opening, closing and running. The second step needs to determine the entire business process. The charging process of the project is: appointment-insert gun-start device charging-charging charging Information - End Device Charging - Generate Charging Order - Order Payment - Complete Charging. â— Determine the project's IoT architecture The operator requires that the charging pile equipment must be connected to its own server to seamlessly integrate the relevant control logic of the charging pile into the business process of the entire project APP. The server-side SDK provided by the charging pile manufacturer for internal communication with the charging pile device provides a packaged service interface and is finally installed to the operator's server. At the bottom of the project's server side, the relevant business interface that can communicate with the SDK external interface is encapsulated, and the encapsulated low-level interface is called in the relevant business interface of the APP communication, and finally the effect of the APP controlling the charging pile is realized. The entire IOT architecture of the project: charging pile equipment "-" equipment server "-" project server "-" APP client, namely intelligent hardware + data communication platform + business server + mobile client quad-party communication technology architecture. The architecture of the four-party communication does not require the agreement between the smart device and the data communication platform, and the protocol between the client and the smart device. The SDK provided by the APICloud platform has already helped the developer to encapsulate the protocol. The four-party communication architecture can be divided into Wi-Fi or GPRS mode and Bluetooth mode. The following are detailed descriptions of the two modes. Wi-Fi or GPRS mode: When the client controls the smart device, it sends an instruction to the service server through the Http or Socket protocol. After receiving the command, the server sends the command to the smart device, and the smart device receives the command. And the feedback is sent to the service end through the UDP or TCP protocol, and the data received by the service end is sent to the client for display. Bluetooth mode: The smart device establishes a connection channel with the client through the Bluetooth or Beacon protocol. The smart device reports the data to the client through the connection channel. The client submits the data to the service server through Http or Socket, and the service server analyzes the data. The data is sent to the client for display, and the user can send instructions to the smart device through the client's data display to control the device. 4. Project summary The technical difficulty of the intelligent equipment IoT lies in how to solve the real-time communication between the APP and the device and the docking between the APP and different manufacturers. The communication between the server and the intelligent hardware of the project is delivered to the server SDK packaged by the intelligent hardware manufacturer. deal with. The SDK provides a unified service interface. The project server uses the sever layer to communicate with the sever layer, and through the abstract encapsulation of the api interface, completes the direct communication of the sever layer of the sever layer of the APP. In this way, the problem of inconvenient coordination caused by different communication methods and communication protocols of different equipment manufacturers is avoided. The project server no longer cares about the internal communication details of the intelligent hardware, focusing on the realization of business functions and business logic. The APP only needs to call the encapsulated fixed API interface to invoke the intelligent hardware server to communicate with the intelligent hardware, realize the underlying control intelligent hardware of the server, and connect multiple clients of the same APP without the APP version update. The effect of the manufacturer's charging pile. As a medium connecting the real world and the digital world, IoT is increasingly being valued by major companies. APICloud believes that the Internet of Things is not an industry, but a new form of enterprise architecture. There is no industry restriction. The only limitation is human imagination. Looking for a new, improved and longer-lasting vape experience? Look no further than Fume ULTRA. 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