KR20210004097A - TERMINAL APPARATUS SUPPORTING INTERNET OF THINGS(IoT) AND CONTROL METHOD THEREOF - Google Patents

Abstract

The present invention discloses an IoT terminal device and a control method thereof. According to an aspect of the present invention, the IoT terminal device includes: a wireless communication unit for performing wireless communication with other IoT terminal devices; a serial communication unit for performing serial communication; an MCU unit which implements IoT protocols, determines an operation mode by monitoring the input of the serial communication unit, and controls to operate according to the determined operation mode. According to the present invention, it is possible to simply implement and change complex settings and operation control of IoT protocols.

Description

IoT terminal device and its control method {TERMINAL APPARATUS SUPPORTING INTERNET OF THINGS(IoT) AND CONTROL METHOD THEREOF}

The present invention relates to an IoT terminal device and a control method thereof, and more particularly, to an IoT terminal device capable of remotely controlling complex settings and operations of IoT protocols through AT command-based serial communication, and a control method thereof. It is about.

In addition to the explosive growth of the IoT market, in order to control a number of terminal devices, it is inevitable to be constrained by hardware specifications.

A typical IoT platform may be as shown in FIG. 1. Referring to FIG. 1, an IoT platform based on LWM2M and CoAP international standards may include a sensor device 10, an IoT gateway 20, and an IoT server 30.

Here, the terminal device includes two types of terminal devices:'a gateway that extends the communication distance and connects data' and'a device that communicates with the gateway by being connected to the sensor unit'. In order to process and transmit the data generated through the IoT terminal device, a sensor unit that collects analog and physical information at the final end of the terminal device, and a microprocessor (or central processing) equipped with software implementing information modeling The connection between wired/wireless communication units for transmission is important.

Looking at these components in terms of data modeling, they have an OSI hierarchy stack as shown in FIG. 2. In terms of hierarchical representation, the application layer is linked to the services required by the user at the upper level. There will be a number of services to be provided or to do business through the IoT. For example, in the electric power field, there are services such as monitoring of power facilities, standby and environmental monitoring, and protection and cooperation in the public domain. The protocol is a message protocol for the purpose of sending and receiving data by modeling data for this service and then configuring it with a certain address system and rules. Representative protocols used in the application layer include CoAP, LwM2M, and OneM2M.

From Transport Layer to Adaption Layer, protocols used in the network layer are in charge of efficient data transmission according to a series of procedures. Most of them are regulated as international standards, and the Internet of Things in the energy field uses open international conventions as they are. As described above, the central processing unit takes charge of the service layer to the network layer in one profile.

From the Phy/MAC layer, it depends on the hardware characteristics according to the wired/wireless communication method. For example, in the IoT field of energy, wireless communication technologies such as LoRa and Wi-SUN are used in consideration of the power facility operating environment (electric power installation location and spacing between facilities, frequency limit and propagation distance, etc.). The strength and reception sensitivity of a communication signal vary according to hardware characteristics consisting of a digital signal processing (coding and decoding) unit, an RF radio signal processing unit, and an antenna constituting a specific wireless communication technology. This is why it is necessary to select an appropriate communication technology according to the environment in which the IoT is operated. This is the part that the wired/wireless communication department handles.

However, in the conventional system, as the standard protocol secured in the energy IoT field depends on specific wireless technologies (LoRa, Wi-SUN), various protocol stacks are required to implement and change the setting and operation control of the IoT standard protocol. There was a drawback of having considerable difficulty in development because you need to know the features. This has been an obstacle to mass production and utilization of terminal devices in the IoT market.

Accordingly, there is a need to develop a technology that can easily implement and change complex settings and operation control of IoT protocols.

As a prior art related to the present invention, there is Korean Patent Publication No. 2018-0107951 (published on October 4, 2018, title of the invention: a method of providing an Internet of Things service and devices for performing the same).

The present invention has been conceived to improve the above problems, and an object of the present invention is to provide an IoT terminal device and a control method thereof that can easily implement and change complex setting and operation control of IoT protocols.

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) not mentioned will be clearly understood by those skilled in the art from the following description.

An IoT terminal device according to an aspect of the present invention includes a wireless communication unit for performing wireless communication with other IoT terminal devices, a serial communication unit for performing serial communication, and IoT protocols, and inputting the serial communication unit. It monitors and determines an operation mode, and includes an MCU unit controlling to operate according to the determined operation mode.

In the present invention, the serial communication unit may perform UART communication.

In the present invention, the MCU unit is a serial driver that is connected to the serial communication unit and monitors a serial input to determine an operation mode, and when the operation mode is an AT mode, an AT command input through the serial driver Based on the AT command parser for controlling the setting and operation of the IoT protocol, and when the operation mode is a normal mode, a setting and operation control unit may be included to control to be operated by the IoT protocol.

In the present invention, when the serial input is a debug message, the serial driver may determine an operation mode as a normal mode.

In the present invention, the AT command parser analyzes the input AT command to determine which command corresponds to a setting application command, a setting save command, and an operation execution command, and in the case of a setting application command, the previously input After saving the setting information and resetting the terminal device, the above setting information is applied. In the case of a setting save command, the setting information input through the corresponding setting save command is saved, and in the case of an action execution command, the input through the corresponding action execution command Actions can be executed.

In the present invention, the setting storage command is a command for changing execution-related setting information used in the IoT protocol, and includes a gateway IP and server IP setting command, a gateway OID setting command, a device OID setting command, It includes at least one of a simple registration setting command, a simple registration cancellation command, and a complex data URI setting command, and the operation execution command is a command for performing an operation required during a current operation, a simple response command, an AT mode setting command, It may include at least one of a system reset command, an AT command list output command, a composite data transmission command, a setting information output command, a setting information initialization command, and an AT mode end command.

A method for controlling an IoT terminal device according to another aspect of the present invention includes the steps of determining an operation mode by monitoring a serial input by a serial driver. When the operation mode is an AT mode, an AT command parser inputs through the serial driver. And controlling the setting and operation of the IoT protocol based on the AT command.

In the present invention, in determining the operation mode, when the serial input is a debug message, the serial driver may determine the operation mode as a normal mode.

In the present invention, in the controlling of the setting and operation of the IoT protocol, the AT command parser analyzes the input AT command to determine which command corresponds to a setting application command, a setting save command, and an operation execution command. In the case of a setting application command as a result of the determination, the previously input setting information is stored and the terminal device is reset, and then the setting information is applied. In the case of a setting saving command, the setting information input through the corresponding setting storage command is stored. In the case of an operation execution command, it may include executing the operation input through the corresponding operation execution command.

In the present invention, the setting storage command is a command for changing execution-related setting information used in the IoT protocol, and includes a gateway IP and server IP setting command, a gateway OID setting command, a device OID setting command, It includes at least one of a simple registration setting command, a simple registration cancellation command, and a complex data URI setting command, and the operation execution command is a command for performing an operation required during a current operation, a simple response command, an AT mode setting command, It may include at least one of a system reset command, an AT command list output command, a composite data transmission command, a setting information output command, a setting information initialization command, and an AT mode end command.

The present invention may further include providing, by a setting and operation control unit, an IoT service using the IoT protocol when the operation mode is a normal mode.

According to the present invention, by implementing a serial communication unit and a CoAP/AT command parser in an IoT terminal device, complex settings and operations of IoT protocols can be remotely controlled through AT Command-based serial communication.

Meanwhile, the effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within a range that is apparent to a person skilled in the art from the contents to be described below.

1 is a diagram illustrating a general IoT platform.
2 is a diagram for describing a general IoT protocol stack.
3 and 4 are block diagrams illustrating an IoT terminal device according to an embodiment of the present invention.
5 is a flowchart illustrating a method of controlling an IoT terminal device according to an embodiment of the present invention.
6 is an exemplary diagram of setting an IoT terminal device as a gateway according to an embodiment of the present invention.
7 is an exemplary diagram of setting an IoT terminal device according to an embodiment of the present invention as a sensor device.
8 is an exemplary view for explaining a method of converting a normal mode to an AT mode according to an embodiment of the present invention.

Hereinafter, an IoT terminal device and a control method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

In addition, the implementation described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream or a signal. Although discussed only in the context of a single form of implementation (eg, only as a method), the implementation of the discussed features may also be implemented in other forms (eg, an apparatus or program). The device may be implemented with appropriate hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which generally refers to a processing device including, for example, a computer, microprocessor, integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

3 and 4 are block diagrams illustrating an IoT terminal device according to an embodiment of the present invention.

3 and 4, the IoT terminal device 100 according to an embodiment of the present invention includes a sensor unit 110, a memory unit 120, a wireless communication unit 130, a serial communication unit 140, and an MCU. Includes part 150.

The sensor unit 110 detects IoT data and transmits it to the MCU unit 150. In this case, the IoT data may include at least one or more of various pressures, heat, exhaust gas, frequency, arc, gas, temperature, and vibration related to power facilities or devices. The sensor unit 110 may be omitted when the IoT terminal device 100 operates as a gateway.

The wireless communication unit 130 provides an environment capable of performing wireless communication with other IoT terminal devices. The wireless communication unit 130 may use a wireless communication technology such as LoRa and Wi-SUN in consideration of the power facility operating environment (a power installation location and spacing between facilities, a frequency limitation, and a propagation distance, etc.).

On the other hand, conventionally, as the standard protocol secured in the IoT field is subordinated to specific wireless technologies (LoRa, Wi-SUN), the difficulty in the development and service implementation of the IoT terminal device 100 has been high. It has been an obstacle to mass production and utilization of the IoT terminal device 100.

Accordingly, the present invention intends to remotely control complex setting and operation control of IoT protocols through simple AT Command-based serial communication. To this end, the IoT terminal device 100 includes a serial communication unit 140 to remotely control complex settings and operations of IoT protocols through AT Command-based serial communication.

The MCU unit 150 basically includes serial communication ports such as UART, I2C, GPIO, and SPI of various types for inter-chip communication. In this embodiment, the serial communication unit 140 is implemented through UART communication. Hereinafter, for convenience of explanation, the serial communication unit 140 is limited to a UART communication unit. UART is a general-purpose serial communication method, and because the external wired/wireless communication unit and two ports for RX and TX are allocated and used, the UART communication unit transmits commands using two UART pins, which are the basic ports for communication.

The MCU unit 150 implements IoT protocols, monitors the input of the serial communication unit 140, determines a current operation mode, and controls to operate according to the current operation mode.

Referring to FIG. 4 for this MCU unit 150, the MCU unit 150 includes a sensor driver 151 for an interface with the sensor unit 110, a setting and operation control unit 152, and wireless communication with an external IoT terminal device. It includes an RF device driver 153 for communication, an AT command parser (CoAP/AT Command Parser) 154, and a UART driver 155.

The sensor driver 151 receives IoT data collected by the sensor unit 110 and transmits it to the setting and operation control unit 152. The setting and operation control unit 152 may control the operation of IoT data transmitted from the sensor driver 151 through a profile.

The setting and operation control unit 152 sets and operates standard protocols such as CoAP and LwM2M. In this case, the setting and operation control unit 152 provides an IoT service based on a profile including a CoAP/LwM2M protocol stack, a network stack, and a security stack.

The UART driver 155 is connected to the UART communication unit 140 and monitors a serial input to determine an operation mode. That is, the UART driver 155 monitors the UART input and determines whether the current operation mode is an AT mode or a normal mode. At this time, the UART driver 155 may determine that it is a normal mode when a plurality of debug messages are output to the UART TX.

The operation mode may include a normal mode and an AT mode. The general mode is a mode operated by the IoT standard, and if there is information set through AT Command, it operates with the corresponding setting, and if there is no AT Command setting, it operates with the default setting. In general mode, a number of debug messages are output to UART TX, and to convert from general mode to AT mode, an AT command for converting to AT mode, such as “AT+MODE<CR><LF>”, can be used.

The AT mode may be a mode in which AT commands can be used. In the AT mode, the IoT terminal device 100 stops the operation and waits for an AT command input. To exit the AT mode and switch to the normal mode, the AT command for converting to the normal mode, such as “AT+EXIT<CR><LF>” (setting information not saved) or “AT+SET+CONFIG<CR><LF” >” (Save setting information) can be used.

When the current operation mode is the AT mode, the AT command parser 154 determines whether the AT command input through the UART driver 155 is a setting application command, and in the case of a setting application command, stores previously input setting information, and After the device 100 is reset, the setting information is applied.

In addition, when the AT command is a general command, the AT command parser 154 determines whether the input general command is a setting storage command or an operation execution command, and controls to perform an operation according to the determination result.

That is, when the AT command is a setting storage command, the AT command parser 154 stores the corresponding setting information in the memory unit 120. At this time, the setting save command is a command to change the execution-related setting information used in the CoAP/LwM2M IoT protocol.The gateway IP and server IP setting command, the gateway OID setting command, the device OID setting command, and simple registration setting It may include an instruction, a simple deregistration instruction, and a complex data URI setting instruction. The AT command parser 154 changes setting information required for operation through such a setting storage command and stores it in the memory unit 120. For actual application, the changed setting information can be reflected in the IoT terminal device 100 only when the IoT terminal device 100 is reset through the input of the setting application command (AT-SET_Config).

In addition, when the AT command is an operation execution command, the AT command parser 154 sets and transmits a corresponding operation execution command to the operation control unit 152. Then, the setting and operation control unit 152 may execute the corresponding operation according to the operation execution command. At this time, the operation execution command is a command to immediately perform an operation required during the current operation, and is a simple response command, AT mode setting command, system reset command, AT command list output command, complex data transmission command, setting information output command, setting information. It may include an initialization command, an AT mode end command, and the like.

Hereinafter, an AT command for setting and controlling the operation of IoT protocols will be described in detail.

AT Command is a control command composed of ASCII characters and is a communication protocol used between the IoT terminal device 100 and a control device (MCU, PC, etc.). In the AT Command used in the present invention, the general command is "AT+XXX<CR><LF>" as the basic configuration, and the command including data is "AT+XXX=DATA...<CR><LF>". You can do it with a basic configuration. In addition, the end of all AT commands is composed of a line feed character "<CR><LF>", and in the case of a response to a command, the success response may be in the form of "OK+XXX<CR><LF>", and failure The response may be in the form of "ERR+XXX<CR><LF>".

In order to use the AT Command, the IoT terminal device 100 has the Serial BaudRate, Data Bit, Stop Bit, Parity Bit, RTS/CTS, pin for serial communication, the maximum data buffer of commands including data, and AT mode. A command to enter and a command to exit AT mode must be set. For example, Serial Baud Rate is 115200 bps, Data Bit is 8 bits, Stop Bit is 1 bit, Parity Bit is not used, RTS/CTS is not used, Pins required for serial communication are GND, UART RX and UART TX, data. The maximum data buffer of the included command is 192 Bytes, the command to enter the AT mode is AT+MODE<CR><LF>, the command to end the AT mode is AT+EXIT<CR><LF> or AT+SET+ May be CONFIG<CR><LF>.

These AT commands can be classified as shown in Table 1 below.

Although not shown in Table 1, this message is output when the correct AT Command is not input, and there may be a response when AT Command input fails. When AT Command input fails, the response may be, for example, in the structure of'ERR+UnkownCMD:[number of input characters] input characters'.

Hereinafter, the AT Command disclosed in Table 1 will be described in detail.

"AT+NOP" is a command to check a simple response to AT Command input, and has the characteristics as shown in Table 2 below.

Command AT+NOP Explanation Simple response command for AT Command input Input example AT+NOP<CR><LF> Success response OK+NOP<CR><LF> Failure response No failure

"AT+MODE" is a command for converting from normal mode to AT mode, and can be used in both normal mode and AT mode, and has the features as shown in Table 3 below.

Command AT+MODE Explanation Command to switch to AT mode Input example AT+MODE<CR><LF> Success response (AT mode) OK+MODE<CR><LF>
(Normal mode) Waiting...<CR><LF>
OK+AT_ModeStarted<CR><LF> Failure response No failure

"AT+RBT" is a command for rebooting the IoT terminal device 100 in HW, and can be used in both the normal mode and the AT mode, and has features as shown in Table 4 below.

Command AT+RBT Explanation HW Reboot command Input example AT+RBT<CR><LF> Success response OK+RBT<CR><LF> Failure response No failure

"AT+HELP" is an AT Command list and description output command, and has features as shown in Table 5 below.

Command AT+HELP Explanation AT Command list output Input example AT+HELP<CR><LF> Success response OK+CMD_LISTs<CR><LF>-comments xx ... Failure response No failure

"AT+SET_GW_IPv4=" is a command for setting an Ethernet connection in the terminal device 100 for IoT GW, and can input IP, NetMask, Default Gateway, and IoT server IP address as data. Each data is separated by a "," character and there should be no spaces between the data. For example, if the IP, NetMask, Default Gateway IP, and eIoT server IP address are 192.168.5.2,255.255.255.0,192.168.5.1,1.2.3.4, respectively, the command input is "AT+SET_GW_IPv4=192.168.5.2,255.255.255.0 ,192.168.5.1,1.2.3.4".

Command AT+SET_GW_IPv4= Explanation Ethernet connection setting command Input example AT+SET_GW_IPv4=192.168.5.19,255.255.255.0,192.168.5.1,219.250.188.238<CR><LF> Success response OK + input string <CR><LF> Failure response ERR+Input string<CR><LF>

"AT+SET_GW_OID=" is a command for setting the GW OID in the IoT GW terminal device (own OID) or the device terminal device (OID of the GW to be connected), and has the characteristics as shown in Table 7 below.

Command AT+SET_GW_OID= Explanation GW OID setting command Input example AT+SET_GW_OID=1.2.410.200073.1.101.1.225.101.000001<CR><LF> Success response OK + input string <CR><LF> Failure response ERR+Input string<CR><LF>

"AT+SET_DEV_OID=" is a command for setting a device OID in a terminal device (own OID) for an IoT device, and has features as shown in Table 8 below.

Command AT+SET_GW_OID= Explanation Device OID setting command Input example AT+SET_GW_OID=1.2.410.200073.1.101.1.225.102.000001<CR><LF> Success response OK + input string <CR><LF> Failure response ERR+Input string<CR><LF>

“AT+SET_SIMPLE_REG” is a command for setting in order to perform a simple registration operation of the IoT terminal device 100, and has features as shown in Table 9 below.

Command AT+SET_SIMPLE_REG Explanation Simple registration operation setting command Input example AT+SET_SIMPLE_REG<CR><LF> Success response OK + input string <CR><LF> Failure response No failure

"AT+CLR_SIMPLE_REG" is a setting command for canceling the simple registration operation of the IoT terminal device 100, and has features as shown in Table 10 below.

Command AT+CLR_SIMPLE_REG Explanation Command to cancel simple registration operation Input example AT+SET_SIMPLE_REG<CR><LF> Success response OK + input string <CR><LF> Failure response No failure

"AT+SET_COMP_DATA=" is a command that can be used in both the normal mode and the AT mode. When used in the AT mode, it may be a command for setting the data value of the initial complex data of the IoT terminal device 100, and the normal mode When used in, it may be a command for transmitting the complex data included in the command to the IoT server by a simple report whenever the command is transmitted.

"AT+SET_COMP_DATA=" has the characteristics as shown in Table 11 below.

Command AT+SET_COMP_DATA= Explanation (AT mode) Initial complex data value setting command
(General mode) Simple report operation command Input example AT+SET_COMP_DATA=1;2;3<CR><LF> Success response (AT mode) OK+Input string <CR><LF>
(Normal Mode) OK+SIMPLE_REPORT<CR><LF> Failure response ERR+LONG_DATA <192Bytes<CR><LF> (if input string exceeds 192 bytes)

"AT+SET_COMP_URI=" is a command for setting the initial complex data URI configuration value of the IoT terminal device 100, and has features as shown in Table 12 below.

Command AT+SET_COMP_URI= Explanation Initial complex data URI configuration setup command Input example AT+SET_COMP_DATA=/7/0/2;/7/0/3;/7/0/1000<CR><LF> Success response OK + input string <CR><LF> Failure response ERR+LONG_DATA <192Bytes<CR><LF> (if input string exceeds 192 bytes)

"AT+GET_CONFIG" is a command that outputs the currently set values, and has the characteristics shown in Table 13 below.

Command AT+GET_CONFIG Explanation Current setting value output command Input example AT+GET_CONFIG<CR><LF> Success response OK+settings...<CR><LF> Failure response ERR+NoInfo<CR><LF> (no value set)

"AT+SET_CONFIG" is a command for storing the currently set values in the memory unit 120 and executing the normal mode, and has the characteristics as shown in Table 14 below.

Command AT+SET_CONFIG Explanation Save current setting value and command to change general mode Input example AT+SET_CONFIG<CR><LF> Success response OK+SET_CONFIG<CR><LF> Failure response No failure

"AT+RST_CONFIG" is a command for RESET of setting values currently stored in the memory unit 120, and has the characteristics as shown in Table 15 below.

Command AT+RST_CONFIG Explanation Current set value RESET command Input example AT+RST_CONFIG<CR><LF> Success response OK+RST_CONFIG<CR><LF> Failure response No failure

"AT+EXIT" is a command for ending AT mode and executing normal mode, and has the characteristics as shown in Table 16 below.

Command AT+EXIT Explanation AT mode exit -> normal mode execution command Input example AT+EXIT<CR><LF> Success response OK+EXIT<CR><LF> Failure response No failure

The IoT terminal device 100 may remotely control complex settings and operations of IoT protocols through serial communication using the AT command described above.

Meanwhile, the IoT terminal device 100 may operate as an IoT gateway or a sensor device. Internet of Things In order to operate the terminal device 100 as an IoT gateway, there are commands that must be set among AT commands. That is, among AT Commands, "AT+SET_GW_IPv4=xxx", "AT+SET_GW_OID=xxx", "AT+SET_SIMPLE_REG (only when using simple registration)", "AT+SET_COMP_DATA= (only when using complex data)", "AT+SET_COMP_URI= (only when using composite data)" and "AT+SET_CONFIG" must be set.

For example, in order to operate as a gateway, information to be set in the IoT terminal device 100 is "Module IP address: 192.168.5.19", "Module IP NetMask: 255.255.255.0", "Default GW of module IP: 192.168.5.1 ", "eIoT server address: 219.250.188.238", "OID of module: 1.2.410.200073.1.101.1.225.101.000001", "Use simple registration", "Compound data: 1;2;3" and "Compound data URI: Assuming that /7/0/2;/7/0/3;/7/0/1000", the AT Command may be as shown in FIG. 6.

In addition, in order to operate the IoT terminal device 100 as a sensor device, there are commands that must be set among AT commands. In other words, among AT Commands, "AT+SET_GW_OID=xxx", "AT+SET_DEV_OID=xxx", "AT+SET_SIMPLE_REG (only when using simple registration)", "AT+SET_COMP_DATA= (only when using complex data)", "AT+SET_COMP_URI= (only when using composite data)" and "AT+SET_CONFIG" must be set.

For example, in order to operate as a sensor device, information to be set in the IoT terminal device 100 is "registered GW OID: 1.2.410.200073.1.101.1.225.101.000001, module DEV OID: 1.2.410.200073.1.101.1.225.102.000001, and Assuming that simple registration is used, complex data: 1;2;3, complex data URI: /7/0/2;/7/0/3;/7/0/1000", the AT command can be as shown in FIG. have.

In addition, the IoT terminal device 100 may switch to the AT mode while operating in the normal mode. In this case, the AT command parser converts from normal mode to AT mode, and when the AT command “AT+MODE<CR><LF>” is input, it converts to AT mode as shown in FIG. During operation, when “AT+MODE<CR><LF>” is input and a success response “OK+AT_ModeStarted” is received, the AT mode can be switched.

As described above, AT Command is a command system composed of ASCII characters, which is easy to understand intuitively, corresponds to the RESTful command system provided by CoAP with only a few combinations, and TX, RX, GND, which are basically provided for all communications. Since the UART serial communication using only UART is low in implementation difficulty and can be expanded and applied with internal/external communication media of any kind, the present invention can be expected to have utility and effectiveness in the IoT market in the energy field.

5 is a flowchart illustrating a method of controlling an IoT terminal device according to an embodiment of the present invention.

Referring to FIG. 5, when a UART input occurs (S510), the AT command parser 154 determines whether the current operation mode is an AT mode (S520). At this time, the AT command parser 154 may determine the AT mode when the UART input is a debug message.

As a result of the determination in step S520, if the current operation mode is the AT mode, the AT command parser 154 analyzes the input AT command (S530) and determines whether it is a setting application command (S540).

As a result of the determination in step S540, in the case of a setting application command, the AT command parser 154 stores the corresponding setting information, resets the IoT terminal device 100, and then applies the setting information (S550). That is, when the setting application command is input, the AT command parser 154 resets the IoT terminal device 100 so that the CoAP/LwM2M IoT protocol is operated based on the setting information previously input through the setting save command. , Apply the relevant setting information.

If the determination result of step S540 is not the setting application command, the AT command parser 154 determines as a general command (S560), and determines whether the general command is a setting save command (S570).

If the result of the determination in step S570 is a setting storage command, the AT command parser 154 stores the setting information in the memory unit 120 (S580). The setting saving command may be a command for changing setting information related to CoAP/LwM2M execution such as OID used in the CoAP/LwM2M IoT protocol, whether simple registration is used, and a server address. The AT command parser 154 changes setting information required for operation through such a setting storage command and stores it in the memory unit 120. For actual application, the changed setting information can be reflected in the IoT terminal device 100 only when the IoT terminal device 100 is reset through the input of the setting application command (AT-SET_Config).

If, as a result of the determination in step S570, an operation execution command (S590), the AT command parser 154 executes the corresponding operation (S600). The operation execution command is a command used to immediately perform an operation required during the current operation, and can be used for operations such as AT mode conversion, system reset, and complex data transmission.

If, as a result of the determination in step S520, it is not the AT mode, the AT command parser 154 determines the normal mode (S610).

As described above, the IoT terminal device and the control method thereof according to the present invention implement a serial communication unit and a CoAP/AT command parser in the IoT terminal device, so that the complex setting and operation of the IoT protocols can be performed by AT Command-based serial communication. It can be controlled remotely via.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand.

Therefore, the true technical protection scope of the present invention should be determined by the following claims.

100: IoT terminal device
110: sensor unit
120: memory unit
130: Ministry of Wireless Communication
140: serial communication unit
150: MCU unit
151: sensor driver
152: setting and operation control unit
153: RF device driver
154: AT command parser
155: UART driver

Claims (11)

A wireless communication unit for performing wireless communication with other IoT terminal devices;
A serial communication unit to perform serial communication; And
A microcontroller unit (MCU) unit that implements IoT protocols, determines an operation mode by monitoring the input of the serial communication unit, and controls to operate according to the determined operation mode
IoT terminal device comprising a.
The method of claim 1,
The serial communication unit,
An IoT terminal device, characterized in that it performs UART (Universal Asynchronous Receiver Transmitter) communication.
The method of claim 1,
The MCU unit,
A serial driver connected to the serial communication unit and configured to monitor a serial input to determine an operation mode;
An AT command parser for controlling the setting and operation of the IoT protocol based on an AT command input through the serial driver when the operation mode is an AT mode; And
And a setting and an operation control unit for controlling to be operated according to the IoT protocol when the operation mode is a general mode.
The method of claim 3,
The serial driver,
When the serial input is a debug message, an operation mode is determined as a general mode.
The method of claim 3,
The AT command parser,
The input AT command is analyzed to determine which of the command to apply the setting, the command to save the setting, and the command to execute the operation, and in the case of the command to apply the setting as a result of the determination, save the previously input setting information and reset the terminal device. An IoT terminal, characterized in that the setting information is applied, and in the case of a setting-save command, the setting information input through the corresponding setting-save command is stored, and in the case of an operation execution command, an operation input through a corresponding operation execution command is executed. Device.
The method of claim 5,
The setting saving command is a command for changing execution-related setting information used in the IoT protocol. Including at least one of a registration setting command, a simple unregistration command, a complex data URI setting command,
The operation execution command is a command for performing an operation required during the current operation, such as a simple response command, an AT mode setting command, a system reset command, an AT command list output command, a complex data transmission command, a setting information output command, and setting information initialization. An IoT terminal device comprising at least one of a command and an AT mode termination command.
Determining, by the serial driver, an operation mode by monitoring the serial input; And
When the operation mode is the AT mode, controlling, by an AT command parser, the setting and operation of the IoT protocol based on an AT command input through the serial driver;
Control method of an IoT terminal device comprising a.
The method of claim 7,
In the step of determining the operation mode,
The serial driver, when the serial input is a debug message, determines an operation mode as a general mode.
The method of claim 7,
The step of controlling the setting and operation of the IoT protocol,
Determining, by the AT command parser, which command corresponds to a setting application command, a setting saving command, and an operation execution command by analyzing the input AT command; And
As a result of the determination, in the case of a setting application command, the previously input setting information is saved and the terminal device is reset, and the setting information is applied. In the case of a setting saving command, the setting information input through the corresponding setting saving command is saved, and the operation is executed And, in the case of a command, executing an operation input through a corresponding operation execution command.
The method of claim 9,
The setting storage command is a command for changing execution-related setting information used in the IoT protocol, and includes a gateway IP and server IP setting command, a gateway OID setting command, a device OID setting command, a simple registration setting command, Including at least one of a simple deregistration command, a complex data URI setting command,
The operation execution command is a command for performing an operation required during the current operation, such as a simple response command, an AT mode setting command, a system reset command, an AT command list output command, a complex data transmission command, a setting information output command, and setting information initialization. A method for controlling an IoT terminal device comprising at least one of a command and an AT mode termination command.
The method of claim 7,
When the operation mode is a general mode, the setting and operation control unit providing an IoT service using the IoT protocol.

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