CN215682318U

CN215682318U - Internet of things gateway equipment

Info

Publication number: CN215682318U
Application number: CN202122087323.7U
Authority: CN
Inventors: 高建华; 杨莉莉
Original assignee: Beijing Huadian Zhongxin Technology Co ltd
Current assignee: Beijing Huadian Zhongxin Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-01-28
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses an internet of things gateway device. Wherein, this equipment includes: the system comprises a processor chip, a wireless modulation module and a power conversion module, wherein the processor chip is connected with the wireless modulation module through an external interface, the external interface is a universal asynchronous receiver transmitter interface (UART), and the processor chip comprises a plurality of UART interfaces; the power supply conversion module is connected with the processor chip and the wireless modulation module, and the power supply module is used for converting the input voltage into a preset voltage to supply power to the wireless modulation module. The utility model solves the technical problem that the processor in the related technology is difficult to realize the communication requirement of the Internet of things security gateway.

Description

Internet of things gateway equipment

Technical Field

The utility model relates to the field of image recognition, in particular to an internet of things gateway device.

Background

The smart energy gateway product is widely applied to various application fields of internet of things data acquisition and uploading cloud platforms, such as building energy consumption subentry measurement, industrial enterprise energy consumption online monitoring, distributed photovoltaic data acquisition and the like. The building energy consumption itemized metering market is integrated into the fields of intelligent buildings, green buildings, smart cities, user side energy management and the like, and an energy consumption data collector (or a smart energy gateway and a smart edge gateway) becomes a standard product for acquiring basic data by a big data platform. Embedded security gateways based on the ARM architecture are an ideal choice for low-cost solutions for such devices.

In the related technology, along with the development of energy consumption item metering service, a plurality of product manufacturers emerge successively within 5-10 years, and compared with the prior art, most of the same owners do not have the idea of complete productization and are matched with the requirements of their own projects for more applications. The processor based on the ARM framework is not developed and popularized in brands with more applications in the industrial field at present. The product research and development of the intelligent gateway aiming at the processor can directly replace the original product application based on the ARM.

In the specification requirements of the national network Internet of things proxy gateway: in the local aspect, the edge Internet of things agent and the ubiquitous power Internet of things terminal can communicate in the modes of Ethernet, power line carrier, wireless, RS485/232 and the like, and a communication module is preferably designed in a modularized mode; the remote edge Internet of things agent equipment and the Internet of things management platform can also adopt communication modes such as Ethernet, wireless private network, wireless public network and the like. At present, no scheme for realizing the communication of the Internet of things security gateway based on a processor exists.

In view of the above problems, no effective solution has been proposed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an internet of things gateway device, which at least solves the technical problem that a processor in the related art is difficult to realize the communication requirement of an internet of things security gateway.

According to an aspect of an embodiment of the present invention, there is provided an internet of things gateway device, including: the device comprises a processor chip 1, a wireless modulation module 2 and a power conversion module 3, wherein the processor chip 1 is connected with the wireless modulation module 2 through an external interface, the external interface is a universal asynchronous receiver transmitter interface (UART), and the processor chip 1 comprises a plurality of UART interfaces; the power conversion module 3 is connected with the processor chip 1 and the wireless modulation module 2, and is used for converting input voltage into preset voltage to supply power to the wireless modulation module 2.

Optionally, the wireless modulation module 2 includes: the wireless modulation chip comprises an input pin and an output pin, the input pin is connected with the output pin of the UART interface, and the output pin is connected with the input pin of the UART interface.

Optionally, the processor chip 1 further includes: the wireless modulation chip further comprises a first mode input pin and a second mode input pin, the first mode input pin is connected with a first preset pin of the GPIO interface, the second mode input pin is connected with a second preset pin of the GPIO interface, and the GPIO interface comprises a plurality of pins.

Optionally, the communication voltage ranges of the processor chip 1 and the wireless modulation chip are overlapped.

Optionally, the communication voltage of the processor chip 1 is a first communication voltage, the communication voltage of the wireless modulation chip is the first communication voltage or a second communication voltage, and the processor chip 1 and the wireless modulation chip communicate with each other through the first communication voltage.

Optionally, the processor chip 1 is an RK3568 chip, and the wireless modulation chip is an E22-400T22S chip.

Optionally, the RK3568 chip includes 10 UART interfaces.

Optionally, the input pin of the E22-400T22S chip is an RXD pin, and the output pin is a TXD pin.

Optionally, the first mode input pin of the E22-400T22S chip is an M0 pin, and the second mode input pin is an M1 pin.

Optionally, the power conversion module 3 is a K7805-3AR3 DC/DC power conversion module 3.

In the embodiment of the utility model, a processor chip 1, a wireless modulation module 2 and a power conversion module 3 are adopted, wherein the processor chip 1 is connected with the wireless modulation module 2 through an external interface, the external interface is a universal asynchronous receiver transmitter interface UART, and the processor chip 1 comprises a plurality of UART interfaces; the power supply conversion module 3 is connected with the processor chip 1 and the wireless modulation module 2, the power supply conversion module is used for converting input voltage into preset voltage to supply power to the wireless modulation module 2, and the processor chip is connected with the wireless modulation module through an external interface, so that the wireless modulation function is expanded for the processor chip, the purpose of meeting the communication requirement of the Internet of things security gateway is achieved, and the technical problem that the processor is difficult to meet the communication requirement of the Internet of things security gateway in the related technology is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

fig. 1 is a schematic diagram of an internet of things gateway device according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an overall architecture of an internet of things gateway device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection lines of RK3568 and E22-400T22S according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of a voltage conversion circuit according to an embodiment of the utility model;

FIG. 5 is a schematic diagram of an E22-400T22S hardware installation in accordance with an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Fig. 1 is a schematic diagram of an internet of things gateway device according to an embodiment of the present invention, and as shown in fig. 1, according to an aspect of the embodiment of the present invention, there is provided an internet of things gateway device including: a processor chip 1, a wireless modulation module 2, a power supply conversion module 3,

the processor chip 1 is connected with the wireless modulation module 2 through an external interface, wherein the external interface is a universal asynchronous receiver transmitter interface UART, and the processor chip 1 comprises a plurality of UART interfaces; the power conversion module 3 is connected with the processor chip 1 and the wireless modulation module 2, and is used for converting the input voltage into a preset voltage to supply power to the wireless modulation module 2.

By adopting the device, a processor chip 1, a wireless modulation module 2 and a power conversion module 3 are adopted, the processor chip 1 is connected with the wireless modulation module 2 through an external interface, wherein the external interface is a universal asynchronous receiver transmitter interface (UART), and the processor chip 1 comprises a plurality of UART interfaces; the power supply conversion module 3 is connected with the processor chip 1 and the wireless modulation module 2, the power supply conversion module is used for converting input voltage into preset voltage to supply power to the wireless modulation module 2, and the processor chip is connected with the wireless modulation module through an external interface, so that the wireless modulation function is expanded for the processor chip, the purpose of meeting the communication requirement of the Internet of things security gateway is achieved, and the technical problem that the processor is difficult to meet the communication requirement of the Internet of things security gateway in the related technology is solved.

The internet of things gateway device is used for coordinating management and processing of communication data of each terminal in the internet of things, the internet of things gateway device further comprises other wired communication ports, such as a USB interface in fig. 2, an RJ45 network interface, a 485 terminal serial port and the like, and can also comprise other wireless modules, such as a 4G module in fig. 2, but the internet of things gateway device in the related art adopts a 4G module, the transmission rate is high, but the power consumption is also high, and packet loss is easy, the wireless modulation module can have strong performance of consistent same-frequency interference, the stability requirement of internet of things communication can be better met, and the problems that the distance, the interference resistance and the power consumption are high cannot be considered in the traditional design scheme are solved.

Specifically, when the wireless modulation module is used, a 4G module can be selected for communication data with large data volume, namely communication data with data volume exceeding the preset data volume, efficient transmission is achieved, and the wireless modulation module can be selected for communication data with small data volume, namely communication data with data volume not exceeding the preset data volume, so that the wireless modulation module is anti-interference and can transmit at a longer distance by adopting lower power consumption, and the requirements of the internet of things gateway on more diversity are met, including stability requirements and energy-saving requirements.

The wireless modulation module can be separately and independently arranged with the existing wireless module of the Internet of things gateway, and does not interfere with the wireless module on the circuit board of the Internet of things gateway, so that the communication stability is better improved.

The wireless modulation module can be realized by hardware of a wireless modulation chip. The input pin and the output pin of the wireless modulation chip are respectively connected with the output pin and the input pin of a UART interface of the processor chip. Specifically, an input pin of the wireless modulation chip is connected with an output pin of the UART interface, and an output pin of the wireless modulation chip is connected with an input pin of the UART interface. Thereby realizing the purpose of expanding the wireless modulation function for the processor chip.

The processor chip is further connected with two mode input pins of the wireless modulation chip through two pins of the GPIO interface, a first preset pin of the specific GPIO interface is connected with a first mode input pin of the wireless modulation chip, and a second preset pin of the GPIO interface is connected with a second mode input pin of the wireless modulation chip. The GPIO interface includes a plurality of pins, and the mode input pins of the wireless modulation chip include only two pins, namely, an M0 pin and an M1 pin.

The communication voltage range of the processor chip coincides with the communication voltage range of the wireless modulation chip, which also means that the communication signal of the processor chip can be directly transmitted to the wireless modulation chip and transmitted in a wireless modulation mode. The circuit board has the advantages that extra voltage conversion equipment is not needed for conversion, convenience and practicability are achieved, the space of the circuit board is saved, and the problem that functions cannot be realized due to the fact that the space is not enough and the voltage conversion equipment cannot be added is solved.

Specifically, the communication voltage of the processor chip is the first communication voltage, the communication voltage of the wireless modulation chip is compatible with the first communication voltage and the second communication voltage, the transmission of the electric signals of the communication data can be carried out between the processor chip and the wireless modulation chip through the first communication voltage, extra voltage conversion equipment is not needed for conversion, convenience and practicability are achieved, the space of the circuit board is saved, and the problem that due to the fact that the space is insufficient, the function cannot be achieved due to the fact that the voltage conversion equipment cannot be added is solved.

Besides a high-performance CPU and a GPU, the RK3568 chip is also provided with a third-generation AI processor, so that the performance requirements of security, industrial control and Internet of things gateway application are effectively expanded. The RK3568 CPU carries a brand-new ARM V8.2-A framework, and the efficiency is effectively improved. Adopts 22nm advanced technology, low power consumption and high performance. Abundant interfaces meet the diversified requirements of the IOT industry; the peripheral high-speed interface comprises a plurality of peripheral high-speed interfaces, 2 paths of RGMII interfaces, PCIE2.1 and PCIE3.0, and at most 3 paths of SATA3.0, 2 paths of USB2.0 and 2 paths of USB 3.0.

The E22-400T22S chip is a wireless serial port module (UART) based on an SX1268 radio frequency chip, has multiple transmission modes, works in a (410.125-493.125MHz) frequency band (433.125 MHz in default), adopts a LoRa spread spectrum technology, outputs TTL levels, and is compatible with 3.3V and 5V IO voltages. Compared with the previous generation, the distance is longer, the power consumption is lower, and the volume is smaller; and the functions of air awakening, wireless configuration, carrier monitoring and relay networking are supported.

Optionally, the RK3568 chip includes 10 UART interfaces.

The RK3568 chip has rich external interface resources, wherein the number of the UARTs is 10, and one UART can be selected according to reasonable allocation of the resources to expand the LORA function. As shown in FIG. 3, the UART9 interface is selected to realize the connection between the RK3568 chip and the E22-400T22S chip.

As shown in fig. 3, when the RK3568 chip is connected to the E22-400T22S chip, the output pin of the UART9 interface, the UART9_ TX _ M1 pin, and the RXD pin are connected to each other, and the UART9_ TX _ M1 pin unidirectionally transmits a communication electrical signal to the RXD pin. An input pin of the UART9 interface, the UART9_ RX _ M1 pin, is connected to the TXD pin, and a communication electrical signal is transmitted unidirectionally from the TXD pin to the UART9_ RX _ M1 pin. So as to realize the communication between the RK3568 chip and the E22-400T22S chip.

As shown in FIG. 3, the RK3568 chip is connected with two mode input pins of the E22-400T22S chip by using a C7 pin and a D0 pin of a GPIO interface. The working mode of the E22-400T22S chip is controlled. Specifically, a pin GPIO _ C7_ u of C7 is connected with a pin M0 of an E22-400T22S chip, and a pin GPIO _ D0_ u of D0 is connected with a pin M1 of the E22-400T22S chip.

That is, the RK3568 chip adopts an unnecessary correspondence relationship between the pin of the GPIO interface and the M0 pin and the M1 pin of the E22-400T22S chip, and as another embodiment, the GPIO _ C7_ u pin of the C7 may be connected to the M1 pin of the E22-400T22S chip, and the GPIO _ D0_ u pin of the D0 pin may be connected to the M0 pin of the E22-400T22S chip.

The working modes of the E22-400T22S chip are four as follows:

the transmission mode is 0, the M1 is 0 (input low level), the M0 is 0, the serial port is opened, the wireless opening is realized, the transparent transmission is realized, and the air configuration of special instructions is supported.

1WOR mode, M1 is 0, M0 is 1 (input high), which can be defined as WOR sender and WOR receiver, supporting over-the-air wake-up.

2 configuration mode, M1 is 1, M0 is 0, and the user can access the register through the window, thereby controlling the working state of the E22-400T22S module.

3 deep sleep, M1 is 1, M0 is 1, and E22-400T22S modules go to sleep.

As shown in fig. 2, the power conversion module is actually connected to a voltage input interface (8-36V voltage input) of the gateway device for internet of things, and converts the input 8-36V voltage into 5V, so as to not only provide appropriate low voltage for each component on the circuit board, but also ensure the best performance when the power supply is greater than 5V because the E22-400T22S chip supports 2.3-5.5V power supply, and the K7805-3AR3 DC/DC power conversion module converts the external input voltage 8-36V into 5V, so that the E22-400T22S chip can work in the best new performance.

It should be noted that, this embodiment also provides an internet of things gateway based on an RK3568 processor, and a hardware product using the RK3568 Cotex a55 processor as a platform stores a data file including 8G eMMC and an extension TF card, supports 2-way gigabit network ports, 4-way RS485, and supports 1-way 4G wireless communication module and LORA communication module, under the condition that the EMC 3-level test of the whole machine is guaranteed to pass. The equipment has the advantages of super-strong compatibility and expansibility, professional interface modules, flexible selection of customers, and the wireless modules are all in the form of connection inside the case, so that the influences of stability, safety and the like caused by external installation are avoided.

Aiming at the defects in the prior art and the application requirements of customers, the scheme provides a method for realizing the Internet of things security gateway communication based on a localization processor. In the embodiment, a main chip RK3568 chip is selected as a new generation AIoT computing platform which is newly promoted by a core micro-total technology, and besides a high-performance CPU and a GPU, a third generation AI processor is also carried, so that the performance requirements of security, industrial control and Internet of things gateway application are effectively expanded. The RK3568 CPU carries a brand-new ARM V8.2-A framework, and the efficiency is effectively improved. Adopts 22nm advanced technology, low power consumption and high performance. Abundant interfaces meet the diversified requirements of the IOT industry; the peripheral high-speed interface comprises a plurality of peripheral high-speed interfaces, 2 paths of RGMII interfaces, PCIE2.1 and PCIE3.0, and at most 3 paths of SATA3.0, 2 paths of USB2.0 and 2 paths of USB 3.0.

Fig. 2 is a schematic diagram of an overall architecture of an internet of things gateway device according to an embodiment of the present invention, and as shown in fig. 2, the scheme of this embodiment mainly includes an RK3568 system module, a power conversion module, a USB module, a network interface module, a 485 module, a wireless module, and other expansion function modules.

The wireless communication module in this embodiment includes a 4G module in minicipie format and a LORA module in UART extension. When the master station equipment cannot be connected with an external network and is in a point-to-point communication mode, the master station equipment adopts a radio transmission mode, data acquisition or remote management, and the master station acquires one-to-many communication. The 4G transmission rate is high, but the power consumption is high, and the packet loss is easy, and the LoRa module adopts the spread spectrum modulation technology to have obvious advantage in the aspect of inhibiting the performance of same frequency interference, has solved the drawback that traditional design can't compromise distance, anti-interference and consumption simultaneously.

The E22-400T22S chip adopted by the embodiment is a brand new generation LoRa wireless module, and a wireless serial port module (UART) based on an SX1268 radio frequency chip of SEMTECH company has multiple transmission modes, works in a (410.125-493.125MHz) frequency band (433.125 MHz in default), adopts a LoRa spread spectrum technology, outputs TTL level, and is compatible with 3.3V and 5V IO voltage. Compared with the previous generation, the distance is longer, the power consumption is lower, and the volume is smaller; and the functions of air awakening, wireless configuration, carrier monitoring and relay networking are supported. The main use pins are shown in Table 1, where Table 1 is a pin information Table for E22-400T 22S:

table 1 Pin information Table E22-400T22S

The RK3568 chip has abundant external interface resources, wherein there are 10 UARTs, and the UART9 is selected according to the reasonable allocation of the resources to expand the LORA function, the connection between the RK3568 and the E22-400T22S modules is shown in FIG. 3, and FIG. 3 is a schematic diagram of the connection between the RK3568 and the E22-400T22S according to the embodiment of the utility model.

The communication level of the E22-400T22S module is compatible with 3.3V and 5V, the VCCIO7 of RK3568 supplies 3.3V, and the IO level of the part is also 3.3V, so that the two modules can be directly connected without a level conversion chip. Besides the UART interface, the RK3568 also leads out two GPIOs to control M0\ M1 of the lora module so as to determine the working mode.

The working modes are four as follows:

the method comprises the following steps of a 0 transmission mode, wherein M1 is 0, M0 is 0, a serial port is opened, wireless opening is realized, transparent transmission is realized, and air configuration of a special instruction is supported.

1WOR mode, M1 is 0, M0 is 1, can be defined as WOR sender and WOR receiver, supports over-the-air wakeup.

3 deep sleep, M1 is 1, M0 is 1, and E22-400T22S modules go to sleep.

The E22-400T22S module supports 2.3-5.5V power supply, the best performance can be guaranteed when the power supply is larger than 5V, the input power supply of the whole machine is required to be a wide-voltage 8-36V power supply, the space in the board is limited, and a large-size power supply conversion module cannot be used, and finally the golden rising DC/DC power supply conversion module K7805-3AR3 is selected in the scheme and is a high-efficiency switching regulator. The device has the characteristics of high efficiency, low no-load power consumption, short-circuit protection function and the like, and does not need additional radiating fins in use. The product can be widely applied to a plurality of industries such as industrial control, electric power, instruments and the like.

Fig. 4 is a schematic diagram of a voltage conversion circuit according to an embodiment of the present invention, and as shown in fig. 4, the central K7805-3AR3 is the DC/DC module, and the supply voltage of the K7805-3AR3 may be adjusted through the resistor R2010 and the resistor R2012, and may fluctuate up and down, for example, the 5V supply voltage may be adjusted to 5.5V.

Fig. 5 is a schematic diagram of the hardware installation of E22-400T22S according to the embodiment of the utility model, as shown in fig. 5, the pins of the E22-400T22S module can be directly soldered on the PCB board by stamp holes, and the height is also low, so that the minipci slots of the E22-400T22S module can be overlapped with the minipci slots of 942EB without interference during actual installation. The MiniPCie slot is used for plugging 4G communication equipment.

The scheme of the embodiment selects the characteristics of the lora communication technology, such as high sensitivity, long transmission distance, low working power consumption, and many networking nodes. The method is mainly applied to the low-cost large-scale Internet of things industry, such as wireless meter reading (ammeter/water meter), industrial automatic control, environment monitoring, environmental monitoring and the like. The product adopts fanless heat dissipation, industrial protection, dust prevention and silence, and is more reliable. And simultaneously, the device driver, tool software and the like of the operating system are provided, so that various application requirements of customers are met. The E22-400T22S module in the scheme of the embodiment can be replaced by LORA modules of the same type of other manufacturers, and the volume and the installation are not convenient. The scheme of this embodiment is verified through the experiment, and the function can reach the expectation requirement, can apply to different wisdom energy gateway products.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An internet of things gateway device, comprising: a processor chip (1), a wireless modulation module (2), a power conversion module (3),

the processor chip (1) is connected with the wireless modulation module (2) through an external interface, wherein the external interface is a universal asynchronous receiver transmitter interface (UART), and the processor chip (1) comprises a plurality of UART interfaces;

the power supply conversion module (3) is connected with the processor chip (1) and the wireless modulation module (2), and is used for converting input voltage into preset voltage to supply power to the wireless modulation module (2).

2. The gateway device according to claim 1, wherein the wireless modulation module (2) comprises: a wireless modulation chip is arranged on the base station,

the wireless modulation chip comprises an input pin and an output pin, the input pin is connected with the output pin of the UART interface, and the output pin is connected with the input pin of the UART interface.

3. The gateway device according to claim 2, wherein the processor chip (1) further comprises: a GPIO interface is connected with the external device,

the wireless modulation chip further comprises a first mode input pin and a second mode input pin, the first mode input pin is connected with a first preset pin of the GPIO interface, the second mode input pin is connected with a second preset pin of the GPIO interface, and the GPIO interface comprises a plurality of pins.

4. The gateway device of claim 3, wherein the communication voltage ranges of the processor chip (1) and the wireless modulation chip coincide.

5. The gateway device of claim 4, wherein the communication voltage of the processor chip (1) is a first communication voltage, the communication voltage of the wireless modulation chip is the first communication voltage or a second communication voltage, and the processor chip (1) and the wireless modulation chip communicate through the first communication voltage.

6. The gateway device of claim 3, wherein the processor chip (1) is a RK3568 chip and the wireless modulation chip is an E22-400T22S chip.

7. The gateway device of claim 6, wherein the RK3568 chip comprises 10 UART interfaces.

8. The gateway apparatus according to claim 7, wherein the input pin of the E22-400T22S chip is RXD pin, and the output pin is TXD pin.

9. The gateway device of claim 8, wherein the first mode input pin of the E22-400T22S chip is an M0 pin, and the second mode input pin is an M1 pin.

10. The gateway device according to any of claims 1 to 9, wherein the power conversion module (3) is a K7805-3AR3 DC/DC power conversion module (3).