Wireless configuration system and method of DDC (Direct Digital Control) device based on NFC (Near Field Communication)

Abstract

The invention discloses a wireless configuration system and method of a DDC device based on NFC, and relates to the technical field of wireless communication, and the wireless configuration system comprises a DDC device and a mobile terminal carrying NFC. Wherein the DDC device is used for reading a communication key and a parameter to be configured; initializing a module corresponding to each parameter to be configured; updating configuration information of each module according to configuration parameters written by the mobile terminal through NFC communication; the mobile terminal is used for establishing communication connection with the DDC device through NFC; scanning, identifying and verifying the communication key; and after the verification is passed, the to-be-configured parameters are read, and corresponding configuration data are written into the DDC device through NFC communication. Through the NFC technology, a wireless, simple, convenient and direct DDC device configuration scheme which is free of electromagnetic interference and does not need to carry other equipment additionally is realized.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a wireless configuration system and method for a DDC device based on NFC. Background Art

[0002] Currently, most DDC devices are equipped with serial ports as interfaces for configuration and debugging. However, the disadvantage of serial port configuration is that tools such as "USB to serial port" are required each time, which is not only inconvenient to carry, but also requires on-site wiring. In situations such as when configuration is needed temporarily, or the installation location of the DDC device has limited space, or there are numerous external wires for the DDC device, or the testers are not familiar with it, etc., it brings inconvenience to on-site implementers.

[0003] Currently, there are also some newly designed DDC devices that use WiFi networks as interfaces for configuration and debugging. However, using WiFi will increase the total cost of the DDC device additionally, and will inevitably introduce wireless signals and increase the complexity of the on-site electromagnetic environment, which may cause certain interference to the communication of the original wireless devices; the use of WiFi networks requires prior planning of the IP address range and one-to-one correspondence between the IP address and the physical location where the DDC device is installed, etc., which all invisibly increase the workload of on-site implementers during initialization, configuration, debugging, etc. Summary of the Invention

[0004] The main purpose of the embodiments of this application is to propose a wireless configuration system and method for a DDC device based on NFC, so as to improve the debugging efficiency and accuracy of the DDC device.

[0005] To achieve the above object, on the one hand, an embodiment of this application proposes a wireless configuration system for a DDC device based on NFC. The wireless configuration system includes: a DDC device and a mobile terminal carrying NFC.

[0006] Among them, the DDC device is used to read communication keys and parameters to be configured; initialize each module corresponding to the parameters to be configured; update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication.

[0007] The mobile terminal is used to establish a communication connection with the DDC device through NFC; scan, identify, and verify the communication keys; after verification, read the parameters to be configured and then write the corresponding configuration data into the DDC device through NFC communication.

[0008] In some embodiments, the DDC device is configured to read the to-be-configured parameters including DI, AI, DO, and AO input / output types; update the configuration information of the DI, AI, DO, and AO input / output modules according to the configuration parameters written by the mobile terminal through NFC communication.

[0009] The mobile terminal is configured to write the configuration data including DI, AI, DO, and AO input / output types into the DDC device through NFC communication.

[0010] In some embodiments, the mobile terminal includes a mobile phone.

[0011] The mobile phone reads the to-be-configured parameters through an APP or a mini-program, generates the corresponding configuration data in response to the user's configuration of the to-be-configured parameters, and then writes the corresponding configuration data into the DDC device through the NFC of the mobile phone.

[0012] In some embodiments, the DDC device is configured to read the communication key and the to-be-configured parameters from the Flash of the MCU.

[0013] In some embodiments, the DDC device is further configured to filter the DI and AI inputs and collect and check the outputs of the DO and AO in response to the configuration parameters written by the mobile terminal through NFC communication.

[0014] In some embodiments, the DDC device is further configured to detect the network link and switch the network interface in response to the configuration parameters written by the mobile terminal through NFC communication.

[0015] In some embodiments, the DDC device is further configured to perform online detection, communication, and management between the main DDC and the extended DDC in response to the configuration parameters written by the mobile terminal through NFC communication.

[0016] To achieve the above object, on the other hand, an embodiment of the present application provides a wireless configuration method for a DDC device based on NFC. The method is applied to a wireless configuration system for a DDC device based on NFC as described in the present application. The method includes the following steps:

[0017] Establish a communication connection between the mobile terminal and the DDC device through NFC.

[0018] Use the DDC device to read the communication key and the to-be-configured parameters, and initialize the modules corresponding to each of the to-be-configured parameters.

[0019] Use the mobile terminal to scan, identify, and verify the communication key.

[0020] After passing the verification, the mobile terminal is used to read the to-be-configured parameters and then write the corresponding configuration data into the DDC device through NFC communication;

[0021] The DDC device is used to update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication.

[0022] The embodiments of the present application at least include the following beneficial effects:

[0023] The wireless configuration system of the present application includes: a DDC device and a mobile terminal with NFC; wherein, the DDC device is used to read the communication key and the to-be-configured parameters; initialize each module corresponding to the to-be-configured parameters; update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication; the mobile terminal is used to establish a communication connection with the DDC device through NFC; scan, identify and verify the communication key; after passing the verification, read the to-be-configured parameters and then write the corresponding configuration data into the DDC device through NFC communication. The present application realizes a DDC device configuration solution that is free of electromagnetic interference, does not require additional equipment to be carried, and is wireless, simple, convenient and direct through NFC technology. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of a wireless configuration system for a DDC device based on NFC provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic flowchart of a wireless configuration method for a DDC device based on NFC provided by an embodiment of the present application;

[0027] Figure 3 It is an example structural diagram of a wireless configuration system for a DDC device based on NFC provided by an embodiment of the present application;

[0028] Figure 4 It is an example flowchart of a wireless configuration method for a DDC device based on NFC provided by an embodiment of the present application;

[0029] Figure 5 It is an optional processing flowchart of APP or small program software provided by an embodiment of the present application. Detailed Embodiments

[0030] In order to make the objectives, technical solutions and advantages of this application clearer and more understandable, the following further elaborates on this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain this application and are not used to limit this application. When the following description involves the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the embodiments of this application. They are merely examples of devices and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0031] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if", "when" as used herein may be interpreted as "when...", "while...", or "in response to determining".

[0032] The terms "at least one", "multiple", "each", "any one", etc. used in this application, at least one includes one, two or more than two, multiple includes two or more than two, each refers to each one of the corresponding multiple, and any one refers to any one of the multiple.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0034] Before elaborating in detail on the embodiments of this application, first, some related technologies involved in the embodiments of this application are described as follows:

[0035] NFC: Near Field Communication (NFC for short), is an emerging technology. Devices using NFC technology (such as mobile phones) can exchange data when they are close to each other. It is evolved from the integration of non-contact radio frequency identification (RFID) and interoperability technology. By integrating the functions of an inductive card reader, an inductive card, and peer-to-peer communication on a single chip, mobile payment, electronic ticketing, access control, mobile identity recognition, anti-counterfeiting, etc. applications are realized using mobile terminals.

[0036] DDC device: Direct Digital Control, also known as the DDC system, is a system that uses an MCU to detect the controlled parameters, performs calculations based on the set values and control algorithms, and then outputs to the actuator to control the production, so that the controlled parameters are stabilized at the given values. It is a multi-functional digital control system that directly implements various forms of control for multiple control loops by using the time-sharing processing function of the MCU. In such a system, the output of the MCU directly acts on the controlled object, so it is called direct digital control, and the English abbreviation is DDC.

[0037] DI module: Digital Input module, which is used to receive the switch states or pulse signals of external devices. Usually, they are discrete binary signals 0 or 1, including relay contacts, TTL levels, etc.;

[0038] DO module: Digital Output module, which is used to send switch state information to external devices. Usually, they are discrete binary states "on" or "off", including relays, solenoid valves, etc.;

[0039] AI module: Analog Input module, which is used to receive analog and continuous signals of external devices. Usually, it is divided into current type (4mA - 20mA) and voltage type (2V - 10V), including continuously changing measurement data such as temperature, pressure, and liquid level;

[0040] AO module: Analog Output module, which is used to output analog and continuous signals to external devices. Usually, it is divided into current type (4mA - 20mA) and voltage type (2V - 10V), including devices that require continuous adjustment such as control valves and frequency converters;

[0041] CAN: Controller Area Network (CAN) is a serial communication protocol bus for real-time applications. It can use twisted pairs to transmit signals and is one of the most widely used fieldbuses in the world. The CAN protocol is used for communication between various different components in automobiles to replace expensive and bulky wiring harnesses. The robustness of this protocol extends its use to other automation and industrial applications. The characteristics of the CAN protocol include complete serial data communication, providing real-time support, a transmission rate of up to 1 Mb / s, 11-bit addressing, and error detection capabilities.

[0042] Refer to Figure 1 , the embodiment of the present application provides a wireless configuration system for a DDC device based on NFC. The wireless configuration system includes: a DDC device and a mobile terminal carrying NFC;

[0043] Among them, the DDC device is used to read communication keys and parameters to be configured; initialize each module corresponding to the parameters to be configured; update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication.

[0044] The mobile terminal is used to establish a communication connection with the DDC device through NFC; scan, identify and verify the communication key; after the verification passes, read the parameters to be configured and then write the corresponding configuration data to the DDC device through NFC communication.

[0045] Optionally, the DDC device is used to read the parameters to be configured including input and output types such as DI, AI, DO, and AO; update the configuration information of DI, AI, DO, and AO input and output modules according to the configuration parameters written by the mobile terminal through NFC communication.

[0046] The mobile terminal is used to write the configuration data including input and output types such as DI, AI, DO, and AO to the DDC device through NFC communication.

[0047] Optionally, the mobile terminal includes a mobile phone.

[0048] The mobile phone reads the parameters to be configured through an APP or a small program and generates the corresponding configuration data in response to the user's configuration of the parameters to be configured, and then writes the corresponding configuration data to the DDC device through the NFC of the mobile phone.

[0049] Optionally, the DDC device is used to read the communication key and the parameters to be configured from the Flash of the MCU.

[0050] Optionally, the DDC device is further used to filter DI and AI inputs and collect and check the outputs of DO and AO in response to the configuration parameters written by the mobile terminal through NFC communication.

[0051] Optionally, the DDC device is further used to detect network links and switch network interfaces in response to the configuration parameters written by the mobile terminal through NFC communication.

[0052] Optionally, the DDC device is further used to perform online detection, communication, and management between the main DDC and the extended DDC in response to the configuration parameters written by the mobile terminal through NFC communication.

[0053] Refer to Figure 2, an embodiment of the present application also provides a wireless configuration method for an NFC-based DDC device. The method is applied to a wireless configuration system of an NFC-based DDC device as described in the present application. The method includes the following steps S200 to S240:

[0054] S200: Establish a communication connection between the mobile terminal and the DDC device through NFC;

[0055] S210: Use the DDC device to read the communication key and the parameters to be configured, and initialize the modules corresponding to each of the parameters to be configured;

[0056] S220: Use the mobile terminal to scan, identify, and verify the communication key;

[0057] S230: After the verification is passed, use the mobile terminal to read the parameters to be configured and then write the corresponding configuration data into the DDC device through NFC communication;

[0058] S240: Use the DDC device to update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication.

[0059] Next, the solution of the embodiment of the present application will be introduced and described in detail with specific application examples.

[0060] Technical problems to be solved in this embodiment:

[0061] The solution using NFC technology for configuration in this embodiment has the characteristics of no electromagnetic interference, no need to carry other devices additionally, simplicity, convenience, directness, etc., to solve the disadvantages of serial port configuration and WiFi configuration. Through the use of ultra-short-range NFC communication, direct, non-contact, one-to-one communication between the mobile phone and the DDC device is achieved, so as to realize processes such as rapid configuration of the DDC and reading of DDC device information. The advantages are as follows:

[0062] 1. The cost of the NFC module is lower than that of the WiFi module;

[0063] 2. NFC is an ultra-short-range near-field communication (the effective distance is generally not more than 10 cm), with a low frequency (13.56 MHz), and the electromagnetic interference is much lower than that of WiFi and can be ignored;

[0064] 3. The mobile phone can be effectively used as a configuration end and a collection end of data, without the need to carry other tools additionally, which facilitates the configuration process;

[0065] 4. NFC is "configured as soon as it is seen". There is no need to plan an IP address like WiFi. Just bring the mobile phone close to the DDC device to complete it instantly. It is simple and direct, which can simplify the complexity of on-site configuration and save the workload of on-site configuration.

[0066] 5. The communication process is simple and reliable, without the need for complex professional knowledge and complex operation training, with a low failure rate, and ordinary personnel can be competent.

[0067] This embodiment mainly realizes the processes of configuration, communication, data exchange, display, etc. between the mobile phone and the DDC device through NFC communication.

[0068] First, an APP or a small program needs to be developed on the mobile phone, requiring a simple and clear interaction interface that can complete functions such as input, storage, retrieval, packaging, encryption, sending, and receiving, decryption, decoding, display, and saving of configuration data.

[0069] On-site configuration process:

[0070] 1. Locate the DDC device that needs to be configured;

[0071] 2. Open the APP or the small program and ensure that the NFC function is enabled;

[0072] 3. Retrieve the information to be configured and make simple fine-tuning or modifications;

[0073] 4. Bring the mobile phone close to the NFC antenna area on the DDC device (there is an obvious label on the appearance of the DDC), and keep it still (for about 0.5 seconds) until you hear a "beep" sound from the DDC device to complete the configuration of the data and the reading of the information;

[0074] 5. Check the return value and status information of the DDC device on the APP or the small program to check whether the configuration is successful. If it is not successful, repeat the above process.

[0075] When the mobile phone is close to the NFC antenna on the DDC device, the NFC communication process is started, and processes such as NFC device scanning, identification, key verification, device verification passed, encrypted communication of configuration data, status information reading, and device shutdown are completed, thus completing this configuration. The entire configuration process is simple, convenient, rapid, and efficient, and it is an effective and feasible solution to replace serial port configuration and WiFi configuration.

[0076] The solution of this embodiment also includes: methods for changing the types of DI, current-type AI, and voltage-type AI input ports on-site (without disassembling the machine and without changing the hardware circuit); methods for changing the types of current-type AO and voltage-type AO output ports on-site; methods for expanding DDC modules through the CAN bus; methods for connecting and communicating with the server through dual network ports, etc.

[0077] Exemplarily, an example structure diagram of a wireless configuration system for an NFC-based DDC device according to this embodiment is as Figure 3 shown.

[0078] The specific description is as follows:

[0079] a) The power supply powers the MUC, digital-analog input module, digital-analog output module, network communication module,

[0080] CAN communication module, and NFC module;

[0081] b) The MUC receives the inputs of the DI and AI digital-analog input modules and controls the outputs of the DO and AO digital-analog modules;

[0082] c) The MCU interacts with the network communication module to complete the communication between the MCU and the TCP network server;

[0083] d) The MCU interacts with the CAN communication module to complete the communication between the MCU and the extended DDC module;

[0084] e) The MCU communicates bidirectionally with the NFC module, receives the configuration data of the NFC mobile phone, and sends the status information to the mobile phone.

[0085] Exemplarily, an example flowchart of a wireless configuration method for an NFC-based DDC device according to this embodiment is as Figure 4 shown.

[0086] The specific description is as follows:

[0087] a) Step 1: The DDC device is powered on and started, and the program starts to run;

[0088] b) Step 2: The key used for NFC communication has been previously stored in the Flash inside the MCU. This step is to read this key for use in Step 5; read other configuration information such as the input-output types of DI, AI, DO, and AO;

[0089] c) Step 3: Initialize the NFC module, turn on the antenna power supply, and prepare to communicate with the mobile phone APP; initialize other modules such as DI, AI, DO, AO, CAN, and network;

[0090] d) Step 4: When a mobile phone with the NFC function enabled approaches the NFC antenna of the DDC, the NFC module on the DDC will sense it, and the program enters Step 5 to prepare for scanning and identification. Otherwise, continue to detect in Step 4;

[0091] e) Step 5: The NFC module enters the processes of fast scanning, identification, and key verification;

[0092] f) Step 6: If the key verification is successful, it indicates that the mobile APP or mini-program is the DDC-specific APP developed by our company. Proceed to Step 7 to prepare for data transmission. Otherwise, return to Step 4 to continue the detection.

[0093] g) Step 7: At this point, normal communication is possible. The mobile APP or mini-program sends the configuration data to the DDC via NFC. The DDC performs processes such as configuration data format recognition, verification, decoding, and command recognition. After success, it updates the DDC status and saves the configuration data in the Flash inside the MCU. Then it sends the status information to the mobile APP or mini-program to complete this communication process.

[0094] h) Step 8: Update the input / output types of DI, AI, DO, AO or other configuration information to make the configurations of relevant modules take effect immediately.

[0095] i) Step 9: Close this NFC communication process and return to Step 4 to continue detecting the next communication process.

[0096] j) Step: The input / output processing flow of DI, AI, DO, AO, including input filtering, output acquisition and feedback inspection, etc.

[0097] k) Step 11: The network transceiver processing flow, including network link detection, network port switching, etc.

[0098] l) Step 12: The CAN expansion module processing flow, including online detection, communication, management, etc. between the main DDC and the expansion DDC.

[0099] Figure 5 This is an optional software processing flow chart for the APP or mini-program, and the specific description is as follows:

[0100] Step 1: Open the APP or mini-program. Before opening, ensure that the NFC function of the mobile phone is enabled.

[0101] Step 2: The interface starts up, and the configuration and display interfaces are required to be simple and direct.

[0102] Step 3: Call out the saved configuration parameters, which are required to be the same as or close to the parameters to be configured to reduce the workload.

[0103] Step 4: Modify or fine-tune the parameters to adapt to the actual situation of the DDC device.

[0104] Step 5: Save the parameters for convenient subsequent viewing.

[0105] Step 6: Configure the DDC device and read the return information of the DDC device, including other status information, to understand the current situation of the DDC device.

[0106] Step 7: Data check to see if the configuration result meets the expectations;

[0107] Go back to step 4 to continue the configuration or end the configuration.

[0108] Through the above solution, this embodiment realizes the NFC wireless configuration of the DDC device using a mobile phone APP or a small program, so as to solve the problems of inconvenient device carrying, on-site wiring, and increased workload during serial port configuration and WiFi configuration, and improves work efficiency.

[0109] In summary, this embodiment includes the following key technical features:

[0110] 1. This embodiment provides a method for wirelessly configuring a DDC device through NFC communication to achieve a convenient and fast configuration process;

[0111] 2. This embodiment provides a method for a DDC device to change the input port types of DI, current-type AI, and voltage-type AI through NFC configuration (without disassembling the machine and without changing the hardware circuit), and a method for changing the output port types of current-type AO and voltage-type AO (without disassembling the machine and without changing the hardware circuit). When external devices are replaced or changed, the existing wiring of the DDC does not need to be changed, which facilitates the implementation of on-site personnel;

[0112] 3. This embodiment provides a method for a DDC device to expand DDC modules through the CAN bus, which solves the disadvantages of only unidirectional polling and low efficiency when using the RS-485 bus to expand DDC modules. Both the main DDC module and the extended DDC module can initiate the communication process at any time, with automatic bus arbitration, reducing the error rate and improving the communication efficiency between the main and extended DDC modules;

[0113] 4. This embodiment provides a method for a DDC device to connect and communicate with a server through dual network ports. When a network problem such as a loose network cable plug or a Hub failure occurs in one network, the other network is immediately automatically enabled, ensuring the coherence, real-time nature of communication, and the reliability and security of control.

[0114] Beneficial effects:

[0115] This embodiment solves the problems of "inconvenient tool carrying, forgetting to bring tools for temporary configuration, incomplete tools, and device wiring", "wireless interference", and "increased workload" during on-site configuration of DDC devices. The operation is simple, convenient, and fast, saving manpower and improving work efficiency; at the same time, it also has functions such as changing the types of input and output ports on-site, expanding DDC modules using the CAN bus, and switching between dual network ports; the overall cost is low, the circuit structure is simple, and the convenience of product use is greatly improved, with good social benefits.

[0116] The embodiments described in the embodiments of the present application are to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art will know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0117] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer technical solutions than those shown, or combine some technical solutions, or different technical solutions.

[0118] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and their appropriate combinations.

[0119] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above figures are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0120] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one) of the following" or its similar expressions refer to any combination of these items, including any combination of single items (ones) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a, b, and c", where a, b, and c can be single or multiple.

[0121] The preferred embodiments of the embodiments of the present application have been described above with reference to the accompanying drawings, which do not limit the scope of rights of the embodiments of the present application. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall fall within the scope of rights of the embodiments of the present application.

Claims

1. A wireless configuration system for an NFC-based DDC device, characterized in that, The wireless configuration system includes: a DDC device and a mobile terminal with NFC; Among them, the DDC device is used to read communication keys and configuration parameters to be configured; initialize each module corresponding to the configuration parameters to be configured; update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication; The mobile terminal is used to establish a communication connection with the DDC device through NFC; scan, identify and verify the communication key; after the verification passes, read the configuration parameters to be configured and then write the corresponding configuration data to the DDC device through NFC communication.

2. The wireless configuration system of a DDC device based on NFC according to claim 1, characterized in that, The DDC device is used to read the configuration parameters to be configured including input and output types of DI, AI, DO, and AO; update the configuration information of the DI, AI, DO, and AO input and output modules according to the configuration parameters written by the mobile terminal through NFC communication; The mobile terminal is used to write the configuration data including input and output types of DI, AI, DO, and AO to the DDC device through NFC communication.

3. The wireless configuration system of a DDC device based on NFC according to claim 1, wherein The mobile terminal includes a mobile phone; The mobile phone reads the configuration parameters to be configured through an APP or a mini-program and generates the corresponding configuration data in response to the user's configuration of the configuration parameters to be configured, and then writes the corresponding configuration data to the DDC device through the NFC of the mobile phone.

4. A wireless configuration system for a DDC device based on NFC according to claim 1, characterized in that, The DDC device is used to read the communication key and the configuration parameters to be configured from the Flash of the MCU.

5. The wireless configuration system of a DDC device based on NFC according to claim 1, characterized in that, The DDC device is also used to filter the inputs of DI and AI and collect and back-check the outputs of DO and AO in response to the configuration parameters written by the mobile terminal through NFC communication.

6. The wireless configuration system of a DDC device based on NFC according to claim 1, characterized in that, The DDC device is also used to detect the network connection and switch network ports in response to the configuration parameters written by the mobile terminal through NFC communication.

7. The wireless configuration system of a DDC device based on NFC according to claim 1, characterized in that The DDC device is also used to perform online detection, communication, and management between the main DDC and the extended DDC in response to the configuration parameters written by the mobile terminal through NFC communication.

8. A wireless configuration method for an NFC-based DDC device, characterized in that, The method is applied to a wireless configuration system of a DDC device based on NFC as described in claim 1, and the method includes the following steps: Enable the mobile terminal and the DDC device to establish a communication connection through NFC; Use the DDC device to read the communication key and the configuration parameters to be configured, and initialize each module corresponding to the configuration parameters to be configured; Use the mobile terminal to scan, identify and verify the communication key; After the verification passes, use the mobile terminal to read the configuration parameters to be configured and then write the corresponding configuration data to the DDC device through NFC communication; Use the DDC device to update the configuration information of each module according to the configuration parameters written by the mobile terminal through NFC communication.

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