Part One summary

Part Two Project analysis

2.1 system composition

This system consists of water and electricity meters, cloud servers, data collectors, and mobile phonesAPP, web backend,Composed of self-service recharge terminals, etc

2.1.1 (1)Electric energy meterThe communication interface adoptsRS-485Serial bus standard, according to the standardDL/T645-1997,DL/T2007Communication protocol communication, supporting meter reading, control, and prepaid functions.

(2)Water meterThe communication interface adoptsRS-485Serial bus standard, according to the standardM-BUSCommunication methodCommunication protocol communication, supporting meter reading, control, and prepaid functions.

2.1.2Cloud Server: Alibaba Cloud Server（Elastic Compute Service, ECS）It has advanced functions such as self-management, data security protection, automatic fault recovery, and network attack prevention. After integrating the load balancer, multiple servers can be deployed for processing based on the number of users or meters connected (elastic scaling), eliminating single point of failure and improving system availability, ensuring stable and efficient server operation.

2.1.3 Data collector: a communication module that connects the server and the water and electricity meter. Due to the use of water and electricity metersRS-485The interface cannot connect to the remote server. The collector will handle itRS-485Forward the interface data to the cloud server and forward the data issued by the cloud server to the water and electricity meterRS-485Interface.

2.1.4Mobile client application（APP）: ScoreAndroid(Android) andiPhone(Apple) End. （1）Real time online query of current and historical battery levels.

（2）Real time query of current remaining amount and historical water and electricity usage amount.

（3）Open and close the switch online.

（4）Reminding of arrears, Alipay online recharge. After the user successfully recharged, they will receive a real-time SMS notification reminder, and the client will push the successful recharge information.

（5）The user's recharged amount can be paid to the enterprise's Alipay or WeChat official account in real time. The application process is simple, and can be applied with the business license.

（6）APPReal name verification, only need to enter real name information once to bind the account. ID number+Mobile verification code real name verification ensures account security and no information leakage.

（7）Tencent App Store and other major stores can download or scan the QR code to download. One installation, automatic upgrade later.

（8）End to end encryption is used between mobile terminals and server platforms to avoid potential information leakage throughout the entire transmission process.

（9）The user interface is simple, the operation is easy, and the use is convenient.

2.1.5 back-stage managementBased on:WEBCloud server, secure and reliable, fast operation and processing speed Rich and complete functions.

（1） The web-based backend management system allows users to log in anytime and anywhere without the need for software installation or a browser. Unrestricted terminals,Windows、Mac、Linux、Android、iPhoneResolve all accounts.

（2）Management of collectors and water and electricity meters, checking the online status of collectors, and going online/Offline time, online time statistics, energy meter communication status inquiry, etc.

（3）Add, delete, modify permissions, disable and enable administrator accounts. Record administrator login timeIPGeographic location, routes, etc.

（4）Set parameters for water and electricity meters, manage user profiles, and manage water and electricity price profiles.

（5）Support reading of active and reactive energy, voltage, current, active power, reactive power, electricity price, alarm amount, water meter usage, and remaining water meter amount Waiting for data. supportDL/T645All meter reading protocols.

（6）Support timed meter reading, accurate to any meter. Timed function supportcronThe expression specifies time meter reading, interval meter reading, weekday meter reading, settlement day meter reading, etc., to meet any timed meter reading needs.

（7）Statistics, queries, backups, report generation, and export of all meter reading dataExcel.

（8）Prepaid water and electricity meterOpen an account online, recharge, and print invoices.

（9）Print monthly settlement payment receipts for non prepaid water and electricity meters, and send SMS notifications.

（10）Real time queryAppOr download payment records, recharge records, and account statements from self-service recharge terminals.

（11）Search for SMS sending records.

（12）Self service recharge terminal online status viewing, remote authorization, cancellation of authorization, remote screenshot, remote shutdown, remote restart and other operations.

（13）Historical data query

（14）System data backup, archiving, and downloading.

（15）Remote control of power outage, closing and other functions.

2.1.6Self service recharge terminal:

Self service recharge terminalEquipped with self-service recharge, query, printing, and intelligent management functions, with24The self-service feature of hourly unmanned operation maximizes the expansion of business processing channels, business venues, and humanized services, making it high-end, atmospheric, and upscale.

Function:

（1） 24No terminal service available for hours. The main functions support information inquiry, online recharge, and card recharge. The main interface displays clock, calendar, festivals, lunar calendar, and other information.

（2） Information inquiry: The electricity consumption and remaining amount of the energy meter can be queried online (read in real-time from the energy meter).

（3） Online recharge: collect money with Alipay and WeChat QR code, and print bills by self-service. The user's recharge amount is directly issued in real-time to the energy meter, and all processes can be queried in the background.

（4） Card recharge: Suitable for RF card energy meters, the energy meter does not need to be connected to cloud server communication. Collect money with Alipay and WeChat QR code, and print bills by self-service. Recharge to the user's card and swipe the card to complete the recharge operation. The backend can query the records.

（5）WEBRemote authorization in the background, remote screen viewing, remote control of shutdown, and restart. Remote modification of main interface display information (including companyLogoCompany introduction, warm reminder, etc.

（6）After signing with Alipay and WeChat, you can collect money to the designated account in real time. The signing process is simple and fast.

（7）Encryption protocols are used for transmission between terminals and servers to avoid possible information leakage throughout the entire transmission process.

（8） Can play multimedia files and advertise.

Part Three system architecture

The basic framework of the system is centered around cloud servers. It is mainly divided into two parts: the communication scheme between the electric energy meter and the collector, and the cloud service application scheme

3.1 Communication scheme between electric energy meter and server:

Electric energy meters themselves do not have IoT communication capabilities. In the industry, data from multiple electric energy meters is collected by deploying collectors within a certain range and sent to a cloud server after being collected by one collector.

The overall plan is shown in the following figure:

3.1.1The collector communicates with the water and electricity meter.

Our company provides three data collection solutions based on different business scenarios and usage requirements. The system supports the simultaneous use of any one or more combination solutions. The comparison of different solutions is shown in the following table:

3.1.2Communication between collector and server:

The collector acts as a data relay throughout the entire process/The role of a relay is to connect one end to an IoT terminal node, which is only used in computer networksOSIThe data link layer protocol is used in the model to transmit data. The other end of the collector is connected to the server node and uses transport layer protocols to transmit data. The collector receives instructions forwarded by the server-side IoT terminal and forwards the response of the IoT terminal back to the server.

Our company provides three data transmission solutions based on different business scenarios and usage requirements. The system supports the simultaneous use of any one or more combination solutions. The comparison of different solutions is shown in the following table:

remarks:

OSIIt is an open communication system interconnection reference model, which is a well-defined protocol specification.OSIThe model has7Layer structure, each layer can have several sub layers.OSIof7The layers from top to bottom are 7 application layer 6 Representation layer 5 Session layer 4 Transport layer 3 network layer 2 data link layer 1 physical layer Among them, the senior management (i.e7、6、5、4The layer defines the functionality of the application, as follows3Layer (i.e3、2、1The layer is mainly aimed at end-to-end data flow through the network.

Part Four System Function Display