A Cat.1-based and dual ChirpIoT ™ IoT gateway module

CN123020593APending Publication Date: 2026-10-30JIANGSU BEE GRP TECH CO LTD
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Patent Information

Application Number
CN202611100592.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-07-23
Publication Date
2026-10-30

AI Technical Summary

Technical Problem

[0008]针对现有技术中LoRa方案受制于国外企业、存在供应链安全隐患、芯片成本较高以及抗干扰性能不足等问题,本发明提供一种基于Cat.1和双ChirpIoT™模组的物联网网关

Benefits of technology

[0025]1.本发明采用国产ChirpIoT™芯片替代进口LoRa方案,核心芯片具有完全自主知识产权,从根本上避免了对国外企业芯片的依赖,消除了断供、涨价、后门及数据泄漏等供应链安全隐患,满足了能源计量、市政管理、工业物联网等国计民生关键领域对自主可控和数据安全的需求。

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Abstract

The application discloses an Internet of Things gateway based on Cat.1 and double ChirpIoT(TM) modules, which comprises a power module, a first communication module, a control module, a first wireless communication module and a second wireless communication module; the power module provides working voltage for each power unit; the first communication module interacts with a remote server; the control module is connected with the first communication module, controls the working state of the first communication module and interacts with data; the first wireless communication module and the second wireless communication module are connected with the control module respectively, and are used for wireless communication with terminal equipment; the control module selectively activates the first wireless communication module or the second wireless communication module to communicate with the terminal equipment; the application adopts domestic ChirpIoT(TM) chips to replace imported LoRa schemes, realizes self-controlling, improves communication reliability through double module redundancy design, and is lower in cost and better in performance.
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Description

Technical Field

[0001] This invention relates to the field of Internet of Things (IoT) communication technology, and more specifically to an IoT gateway device based on Cat.1 cellular communication and ChirpIoT™ wireless communication. Background Technology

[0002] As a key infrastructure connecting terminal devices and cloud servers, the choice of communication scheme for IoT gateways directly affects the reliability, security, and economy of the entire system.

[0003] Currently, the widely adopted technical solution in the industry is to use Cat.1 communication modules to achieve 4G communication between gateways and servers, and LoRa modules to achieve low-power wide-area network wireless communication between gateways and terminal devices. LTE Cat.1 has become the mainstream choice for medium-speed cellular communication in the Internet of Things due to its mature 4G network coverage and moderate power consumption cost, while LoRa has significant advantages in low power consumption and long-distance communication due to its linear frequency modulation spread spectrum (CSS) modulation technology. However, this seemingly mature combination of technologies has exposed many problems in practical applications.

[0004] 1. The core patents, chip design, and protocol standards of LoRa technology have long been monopolized by the US company Semtech. Although in recent years Semtech has allowed some domestic companies to produce LoRa products through IP licensing, licensed production still relies on foreign core technologies and is not an independently controllable technology. Domestic companies may face the risk of LoRa chips being restricted or even embargoed at any time. For key areas involving national economy and people's livelihood such as smart cities, energy metering, and municipal management, this dependence on foreign technology constitutes a systemic risk that cannot be ignored.

[0005] 2. The cost of LoRa modules has always been one of the barriers to popularization in the low-to-mid-end market. In cost-sensitive application scenarios such as smart metering and smart agriculture, the high cost of modules directly affects the economics and speed of promotion of the project.

[0006] 3. Although LoRa's CSS modulation technology is superior to the traditional FSK modulation method in terms of anti-interference, its anti-blocking performance is still insufficient in complex urban electromagnetic environments and industrial sites.

[0007] In summary, there is an urgent need for a Cat.1 IoT gateway solution that is not dependent on foreign core chips, has lower cost, and better performance, in order to meet the needs of key domestic sectors for self-reliance, data security, and supply chain security. Summary of the Invention

[0008] To address the issues of existing LoRa solutions being reliant on foreign companies, posing supply chain security risks, having high chip costs, and insufficient anti-interference performance, this invention provides an IoT gateway based on Cat.1 and dual ChirpIoT™ modules.

[0009] This gateway uses domestically developed and controllable ChirpIoT™ wireless communication chips to replace imported LoRa solutions. It achieves 4G communication with remote servers through Cat.1 communication modules and adopts a redundant design of dual ChirpIoT™ modules, one main and one backup. This design significantly reduces hardware costs while ensuring communication reliability, providing a secure, controllable, and high-performance infrastructure solution for IoT application scenarios.

[0010] To achieve the above objectives, the present invention provides the following technical solution.

[0011] An IoT gateway based on Cat.1 and dual ChirpIoT™ modules includes a power module, a first communication module, a control module, a first wireless communication module, and a second wireless communication module.

[0012] The power module provides operating voltage to each power-consuming unit. Specifically, it includes a first voltage output terminal, a second voltage output terminal, and a third voltage output terminal. The first voltage output terminal is connected to the power input terminal of the first communication module, providing it with a 3.8V operating voltage. The second voltage output terminal is connected to the power input terminals of the control module, the first wireless communication module, and the second wireless communication module, respectively, providing them with a 3.3V operating voltage. The third voltage output terminal is connected to the power input terminal of the level conversion circuit, providing it with a 1.8V operating voltage. Through the above multi-voltage output configuration, the power module can simultaneously meet the power supply requirements of different power-consuming units within the gateway for different voltage levels.

[0013] Furthermore, the first communication module is used to interact with the remote server. It adopts a Cat.1 communication module and uses a 4G network to realize uplink data transmission and downlink command reception between the gateway and the server.

[0014] The control module is connected to the first communication module, controls the working state of the first communication module and performs data interaction; specifically, the control module monitors the working status pin of the first communication module, and determines whether the first communication module is powered on and running normally based on the level signal output by the pin. When an abnormal working state is detected, the control module performs a reset operation on the first communication module. When communication needs to be started, the control module controls the power-on of the first communication module through the power-on enable pin.

[0015] Furthermore, the control module and the first communication module are connected via a serial communication interface (UART) to transmit data packets and heartbeat packets. In addition, the control module also monitors the timeout status of the first communication module during data interaction. When the number of consecutive timeouts exceeds a preset threshold, the control module reports a communication failure to the server through the first communication module.

[0016] Furthermore, the first wireless communication module and the second wireless communication module are respectively connected to the control module, and both are used to communicate wirelessly with the terminal device.

[0017] Both the first and second wireless communication modules use the ChirpIoT™ communication module, each connected to an antenna. ChirpIoT™ is a Sub-1G long-range low-power wireless transceiver chip with independent intellectual property rights launched by Shanghai Panqi Microelectronics. It adopts an optimized spread spectrum modulation mechanism and has excellent performance in terms of sensitivity, communication distance, wall penetration capability and anti-interference performance.

[0018] The control module is connected to the first wireless communication module and the second wireless communication module via a serial peripheral interface (SPI) to enable the issuance of control commands and the acquisition of terminal data.

[0019] The control module selectively enables either the first wireless communication module or the second wireless communication module to communicate with the terminal device. In normal operation mode, the control module prioritizes sending data or heartbeat packets to the terminal device through the first wireless communication module. If no response is received from the terminal device within a preset timeout period, the control module automatically switches to the second wireless communication module to send data or heartbeat packets to the terminal device. If the second wireless communication module also fails to receive a response from the terminal within the timeout period and the number of consecutive timeouts exceeds a preset threshold, the control module marks the terminal device's communication as invalid and reports it to the server through the first communication module.

[0020] With the above-mentioned dual-module redundancy design of one primary and one backup, when the primary wireless communication module fails or communication is blocked, the system can automatically switch to the backup wireless communication module to continue working, thereby significantly improving the reliability of communication between the gateway and the terminal device. In addition, in high-load scenarios with a large number of terminal devices, the two ChirpIoT™ modules can also work simultaneously to greatly increase the number of terminal accesses.

[0021] Furthermore, the IoT gateway of the present invention also includes a level conversion circuit connected between the first communication module and the control module.

[0022] Since the I / O interface level of the first communication module (Cat.1 communication module) is 1.8V, while the I / O interface level of the control module (MCU) is 3.3V, there is a level difference between the two. Direct connection will cause the signal to be unable to be recognized normally or even damage the device. The level conversion circuit is used to perform bidirectional mutual conversion of the signal levels between the first communication module and the control module to ensure that the serial communication interface, status monitoring pin, power-on control pin and reset pin and other signals between the two can be transmitted normally, and to ensure the stability and reliability of the internal communication of the gateway.

[0023] Furthermore, the control module is preferably implemented using an MCU (microcontroller), which is responsible for the logic control and status management of the entire gateway, including: controlling the power-on, power-off and reset of the first communication module; monitoring the working status of the first communication module and interacting with the first communication module; controlling the selection and switching of the first wireless communication module and the second wireless communication module; and monitoring the working status of each ChirpIoT™ module and interacting with it.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. This invention uses domestically produced ChirpIoT™ chips to replace imported LoRa solutions. The core chip has completely independent intellectual property rights, fundamentally avoiding dependence on foreign companies' chips and eliminating supply chain security risks such as supply disruptions, price increases, backdoors, and data leaks. It meets the needs of key national economic and social development sectors such as energy metering, municipal management, and industrial IoT for independent control and data security.

[0026] 2. The ChirpIoT™ chip adopts an optimized spread spectrum modulation mechanism, which is superior to LoRa solutions in terms of sensitivity, communication distance, wall penetration capability, and anti-interference and anti-blocking performance. At the same time, the chip cost is lower, which effectively reduces the large-scale deployment cost of IoT terminals and is conducive to promoting the popularization and promotion of cost-sensitive application scenarios such as smart metering and smart agriculture.

[0027] 3. This invention adopts a redundant design of dual ChirpIoT™ modules, one main and one backup. The control module automatically switches to the backup module when the main module fails to communicate, which improves the communication reliability of the system. When there are a large number of terminals, the two modules can work simultaneously, which expands the terminal access capacity and can flexibly adapt to the deployment needs of IoT application scenarios of different scales.

[0028] In summary, this invention provides an autonomous, controllable, secure, reliable, lower-cost, and higher-performance gateway solution for the Internet of Things (IoT) field, effectively addressing many shortcomings of existing Cat.1+LoRa solutions in terms of supply chain security, cost, and performance. Attached Figure Description

[0029] Figure 1 This is a system composition block diagram of the Cat.1-ChirpIoT™ gateway of the present invention;

[0030] Figure 2 This is a flowchart of the MCU's power-on and monitoring of the Cat.1 communication module in this invention;

[0031] Figure 3 This is a flowchart illustrating the interaction between the MCU and the Cat.1 communication module of this invention.

[0032] Figure 4 This is a flowchart illustrating the interaction between the MCU and the ChirpIoT™ module of this invention;

[0033] Figure 5 This is a flowchart illustrating the interaction between the Cat.1 communication module and the server in this invention. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] like Figure 1 As shown, the present invention provides an IoT gateway based on Cat.1 and dual ChirpIoT™ modules, which mainly includes a power module, a first communication module, a control module, a first wireless communication module, a second wireless communication module, and a level conversion circuit.

[0036] The power supply module is connected to the first communication module, the control module, the first wireless communication module, the second wireless communication module, and the level conversion circuit, respectively, to provide each module with the required operating voltage.

[0037] The first communication module interacts with the remote server via a 4G antenna and connects to the control module via a serial communication interface.

[0038] The control module is connected to the first wireless communication module and the second wireless communication module through a serial peripheral interface. The first wireless communication module and the second wireless communication module are each connected to an antenna for wireless communication with the terminal device.

[0039] The level conversion circuit is connected between the first communication module and the control module to realize bidirectional conversion of signal levels between the two.

[0040] The power module provides power to the entire gateway. In one specific implementation, the power module includes a first voltage output terminal, a second voltage output terminal, and a third voltage output terminal.

[0041] The first voltage output terminal outputs 3.8V, which is connected to the power input terminal of the first communication module to power the Cat.1 communication module.

[0042] The second voltage output terminal outputs a 3.3V voltage, which is connected to the power input terminals of the control module, the first wireless communication module, and the second wireless communication module, respectively.

[0043] The third voltage output terminal outputs a 1.8V voltage, which is connected to the power input terminal of the level conversion circuit.

[0044] With the above three-channel voltage output configuration, the power module can simultaneously meet the power supply requirements of different power-consuming units within the gateway for different voltage levels.

[0045] In practical applications, the power module can be implemented using a multi-output DC-DC converter chip, or multiple independent LDOs (low dropout linear regulators) can be used to output different voltages respectively.

[0046] Furthermore, the first communication module is implemented using a Cat.1 communication module, which accesses the operator's base station through a 4G network and then establishes a communication link with a remote server to realize uplink data transmission and downlink command reception between the gateway and the server.

[0047] The Cat.1 communication module is equipped with a 4G antenna and a SIM card slot. The 4G antenna is used to transmit and receive cellular network signals, and the SIM card slot is used to install a carrier SIM card to achieve network authentication and access.

[0048] The Cat.1 communication module serves as a data channel between the gateway and the cloud server. It is responsible for uploading the terminal device data collected by the gateway to the server, and at the same time, receiving control commands issued by the server and forwarding them to the control module for processing.

[0049] The control module is connected to the first communication module via a serial communication interface (UART). The control module is responsible for controlling the working status of the first communication module and exchanging data.

[0050] Specifically, the control module is connected to the power-on control terminal of the first communication module through the power-on enable pin. When the Cat.1 communication module needs to be started, the control module outputs an enable signal to the pin to trigger the Cat.1 communication module to power on.

[0051] The control module is also connected to the reset terminal ( / nReset) of the first communication module via a reset pin. When an abnormal operation of the Cat.1 communication module is detected, the control module can perform a reset operation on the Cat.1 communication module through this pin.

[0052] The control module is connected to the working status output pin of the first communication module through the status monitoring pin, which is used to monitor whether the Cat.1 communication module is operating normally in real time. When the Cat.1 communication module is powered on normally, its working status pin will output periodic high and low level signals. The control module can determine the operating status of the Cat.1 communication module by detecting this signal.

[0053] The serial communication interface (UART) between the control module and the first communication module is used to transmit data packets and heartbeat packets, enabling application layer data interaction between the gateway and the server.

[0054] In addition, the control module also monitors the timeout situation during the data interaction with the first communication module. When the control module sends data to the Cat.1 communication module through the serial port and does not receive a response within the preset timeout period, a timeout count is accumulated. When the number of consecutive timeouts exceeds the preset threshold (e.g., 5 times), the control module determines that the communication with the Cat.1 communication module has failed and reports the communication failure information to the server through the Cat.1 communication module.

[0055] Furthermore, both the first and second wireless communication modules are implemented using the ChirpIoT™ communication module.

[0056] ChirpIoT™ is a Sub-1G long-range low-power wireless transceiver chip with independent intellectual property rights launched by Shanghai Panqi Microelectronics. It adopts an optimized linear frequency modulation spread spectrum modulation mechanism and has excellent performance in terms of sensitivity, communication distance, wall penetration capability and anti-interference performance.

[0057] The first wireless communication module and the second wireless communication module are each connected to an antenna for wireless communication with the terminal device in the Sub-1G frequency band.

[0058] The control module is connected to the first wireless communication module and the second wireless communication module via a serial peripheral interface (SPI). The control module sends control commands and data to be sent to the ChirpIoT™ module via the SPI bus, and reads data uploaded by the terminal device from the ChirpIoT™ module via the SPI bus.

[0059] The control module is also connected to the reset pins of the first wireless communication module ( / nReset) and the second wireless communication module ( / nReset) respectively, via reset pins, for independent reset control of each ChirpIoT™ module.

[0060] The control module can also read the operating status registers of each ChirpIoT™ module via the SPI interface to monitor whether it is operating normally.

[0061] The control module selectively enables either the first wireless communication module or the second wireless communication module to communicate with the terminal device.

[0062] In normal operating mode, the control module prioritizes sending data or heartbeat packets to the terminal device through the first wireless communication module (main module).

[0063] When the control module sends data to a terminal device through the first wireless communication module, it starts a timeout timer to wait for the terminal device's response. If a response is received from the terminal device within the preset timeout period, the communication is normal and the timeout counter is cleared. If no response is received from the terminal device within the preset timeout period, the timeout counter is incremented by 1.

[0064] When the number of consecutive timeouts does not exceed the preset threshold (e.g., 5 times), the control module continues to attempt communication using the first wireless communication module, and the normal communication state is restored after the timeout counter is cleared.

[0065] When the number of consecutive timeouts exceeds a preset threshold, the control module determines that the communication link between the first wireless communication module and the terminal device is abnormal, and then automatically switches to the second wireless communication module (backup module) to resend data or heartbeat packets to the terminal device.

[0066] If the second wireless communication module also fails to receive a response from the terminal within the preset timeout period and the number of consecutive timeouts exceeds the preset threshold, the control module marks the terminal device as having invalid communication and reports the terminal device's communication failure information to the server through the first communication module.

[0067] Through the above dual-module redundancy design with one primary and one backup, when the primary wireless communication module fails or communication is blocked, the system can automatically switch to the backup wireless communication module to continue working, thereby significantly improving the reliability of communication between the gateway and the terminal device.

[0068] In high-load scenarios with a large number of terminal devices, the control module can also simultaneously activate the first wireless communication module and the second wireless communication module, assigning the terminal devices to the two modules for communication, thereby significantly increasing the number of terminal accesses.

[0069] The level conversion circuit is connected between the first communication module and the control module. Since the I / O interface level of the first communication module (Cat.1 communication module) is 1.8V, while the control module is usually implemented using an MCU, its I / O interface level is 3.3V, there is a level difference between the two. If a 1.8V level signal is directly connected to the 3.3V I / O port, the signal may not be correctly recognized (the 1.8V high level may not reach the threshold of the 3.3V logic high level); conversely, if a 3.3V level signal is directly connected to the 1.8V I / O port, it may damage the I / O pins of the Cat.1 communication module.

[0070] The level conversion circuit is used to perform bidirectional mutual conversion of signal levels between the first communication module and the control module. It converts the 1.8V signal level on the Cat.1 communication module side to the 3.3V signal level on the control module side, and at the same time converts the 3.3V signal level on the control module side to the 1.8V signal level on the Cat.1 communication module side. This ensures that all signals, such as the serial communication interface (UART) signal, status monitoring pin signal, power-on control pin signal, and reset pin signal, can be transmitted normally between the two, thus ensuring the stability and reliability of communication within the gateway.

[0071] The level conversion circuit can be implemented using a dedicated bidirectional level conversion chip (such as TXB0104, PCA9306, etc.), or it can be implemented using a level conversion circuit built with discrete MOSFETs.

[0072] The control module is preferably implemented using an MCU (microcontroller). As the core control unit of the entire gateway, the MCU is responsible for comprehensive logic control and status management. Specifically, it includes: controlling the power-on, power-off, and reset of the first communication module through the power-on enable pin and reset pin; monitoring the working status of the first communication module through the status monitoring pin; and interacting with the first communication module through the serial communication interface (UART); controlling the selection, reset, and switching of the first and second wireless communication modules through the SPI interface and reset pin; reading the working status register of each ChirpIoT™ module through the SPI interface to monitor its operating status; and transmitting and receiving data with each ChirpIoT™ module through the SPI interface.

[0073] The MCU runs embedded firmware to implement the control logic, communication protocol stack, and timeout counting and switching determination algorithms of the above modules. Those skilled in the art can select different models and performance levels of MCU chips according to actual needs, such as the STM32 series and GD32 series.

[0074] In practical deployment applications, the IoT gateway of this invention can select different working modes according to different application scenarios.

[0075] In smart metering scenarios, gateways can be deployed in the low-voltage wells of residential communities or industrial parks. They communicate with smart water meters, electricity meters, and gas meters within a radius of hundreds of meters via ChirpIoT™ modules, automatically read meter data, and upload it to the cloud management platform via Cat.1 communication modules.

[0076] In smart agriculture scenarios, gateways can be deployed in farmland or greenhouses to collect data from terminal devices such as soil temperature and humidity sensors, light sensors, and CO2 sensors via ChirpIoT™ modules. The data is then uploaded to the agricultural cloud platform via Cat.1 communication modules to achieve precision irrigation and environmental control.

[0077] In smart fire protection scenarios, the gateway maintains real-time communication with terminals such as smoke sensors and temperature detectors distributed on each floor through the ChirpIoT™ module. Once an abnormal alarm signal is detected, it immediately reports to the fire monitoring center through the Cat.1 communication module.

[0078] In the aforementioned application scenarios, the redundant design of the dual ChirpIoT™ modules ensures the continuous availability of the communication link. When one module is subjected to co-channel interference or hardware malfunction, the system automatically switches to the other module, effectively avoiding data loss and communication interruption.

[0079] Implementation Example

[0080] Taking a remote water meter reading system in a smart industrial park as an example, the Cat.1-ChirpIoT™ Internet of Things gateway of this invention is deployed. There are about 200 water meter terminal devices in the park, distributed on different floors of different buildings.

[0081] The gateway is installed in the low-voltage well in the center of the park. The power module is connected to 220V mains power, outputting 3.8V to power the Cat.1 communication module, 3.3V to power the MCU and two ChirpIoT™ modules, and 1.8V to power the level conversion circuit.

[0082] The Cat.1 communication module is equipped with a China Telecom IoT-specific SIM card, which connects to the operator's network via a 4G antenna to establish a communication connection with the cloud-based water management platform.

[0083] The two ChirpIoT™ modules are each configured to operate in the 433MHz frequency band and are each connected to an antenna to communicate wirelessly with water meter terminals distributed within a radius of 500 meters.

[0084] The MCU runs an embedded firmware program and sends meter reading instructions to each water meter terminal through the first ChirpIoT™ module according to the preset meter reading cycle (e.g., once every 6 hours).

[0085] Under normal operating conditions, the first ChirpIoT™ module receives response data (including cumulative water consumption, instantaneous flow rate, battery level, etc.) from each water meter terminal within a 200-millisecond timeout period. The MCU then packages the collected data and uploads it to the cloud-based water management platform via the Cat.1 communication module.

[0086] During a meter reading, the first ChirpIoT™ module sent a meter reading command to a water meter located at the edge of the park. Within a 200-millisecond timeout period, no response was received, and the MCU recorded the timeout count as 1. After five consecutive timeout attempts, the MCU determined that the communication link between the first ChirpIoT™ module and the water meter was abnormal. It then automatically switched to the second ChirpIoT™ module to resend the meter reading command. The second ChirpIoT™ module successfully received the response data, and the MCU uploaded the data to the server and marked the water meter as having resumed normal communication.

[0087] The cloud platform did not detect any communication interruption during the entire switching process. This implementation example fully verifies the feasibility and reliability of the gateway of the present invention in real IoT application scenarios. The Cat.1 communication module ensures that the gateway can communicate with the server in any area with 4G signal coverage. The redundant design of the dual ChirpIoT™ modules effectively copes with the abnormal situation of single module communication obstruction. The adoption of domestic ChirpIoT™ chips fundamentally guarantees the supply chain security of the entire system.

[0088] Those skilled in the art will understand that the above embodiments are merely illustrative examples of many possible embodiments of the present invention. The present invention can also be applied to other IoT application scenarios such as smart agriculture, smart fire protection, smart municipal administration, industrial IoT, smart parking, and smart communities. Furthermore, the specific models and parameters of each module can be adaptively adjusted according to actual application needs.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An IoT gateway based on Cat.1 and dual ChirpIoT™ modules, characterized in that, include: Power supply module, first communication module, control module, first wireless communication module and second wireless communication module; The power module provides operating voltage to each power-consuming unit; The first communication module interacts with the remote server. The control module is connected to the first communication module, and the control module controls the working state of the first communication module and interacts with the first communication module for data. The first wireless communication module is connected to the control module, and the first wireless communication module communicates wirelessly with the terminal device; The second wireless communication module is connected to the control module, and the second wireless communication module communicates wirelessly with the terminal device; The control module selectively enables either the first wireless communication module or the second wireless communication module to communicate with the terminal device.

2. The IoT gateway according to claim 1, characterized in that, The power module includes a first voltage output terminal, a second voltage output terminal, and a third voltage output terminal. The first voltage output terminal is connected to the power input terminal of the first communication module. The second voltage output terminal is connected to the power input terminals of the control module, the first wireless communication module, and the second wireless communication module, respectively. The third voltage output terminal is connected to the power input terminal of the level conversion circuit.

3. The IoT gateway according to claim 2, characterized in that, The power module further includes a level conversion circuit, which is connected between the first communication module and the control module and is used to convert the signal levels between the first communication module and the control module.

4. The IoT gateway according to claim 1, characterized in that, The control module is connected to the first communication module via a serial communication interface, and the control module is connected to the first wireless communication module and the second wireless communication module via serial peripheral interfaces.

5. The IoT gateway according to claim 1, characterized in that, The control module monitors the working status of the first communication module and performs a power-on operation or a reset operation on the first communication module according to the working status.

6. The IoT gateway according to claim 1, characterized in that, The control module sends data to the terminal device through the first wireless communication module, and switches to the second wireless communication module to send data to the terminal device when no response is received from the terminal device.

7. The IoT gateway according to claim 1, characterized in that, The first communication module is a Cat.1 communication module.

8. The IoT gateway according to claim 1, characterized in that, Both the first wireless communication module and the second wireless communication module are ChirpIoT™ communication modules.

9. The IoT gateway according to claim 1, characterized in that, The first wireless communication module and the second wireless communication module are each connected to an antenna.

10. The IoT gateway according to claim 1, characterized in that, The control module is an MCU.