Control circuit of Internet of Things acquisition equipment

Abstract

The utility model discloses a control circuit of Internet of Things acquisition equipment, and relates to the technical field of acquisition and monitoring. The circuit comprises a microcontroller, a communication module, a power supply module and an interface module, the communication module, the power supply module and the interface module are all connected with the microcontroller, and the microcontroller is connected with a plurality of external monitoring sensors through the interface module. The interface module is used for acquiring data acquired by the plurality of external monitoring sensors and sending the data to the microcontroller; the communication module is used for sending the data received by the microcontroller to terminal equipment in a 4G transmission or satellite emission mode; and the power supply module is used for supplying power to the microcontroller, the communication module and the interface module. According to the utility model, the data is transmitted outwards through the communication module in a satellite transmission or 4G transmission mode, the diversity is realized, the accuracy of data transmission is improved, and different application scenes are satisfied.

Description

Technical Field

[0001] This utility model relates to the field of data acquisition and monitoring technology, and in particular to a control circuit for an Internet of Things (IoT) data acquisition device. Background Technology

[0002] The status of water resources is directly related to issues such as rural irrigation, drinking water for residents, and the ecological environment. In recent years, the monitoring of the flow velocity and discharge of water resources such as rivers, dikes, and waterways has received increasing attention in order to protect, manage, and comprehensively utilize water resources as a whole.

[0003] Existing data acquisition devices typically only have terrestrial IoT (such as 4G full-network communication modules or 5G full-network communication modules). When transmitting the acquired data, these devices have certain limitations, as they rely on a single transmission channel and can only transmit data through the terrestrial IoT transmission channel.

[0004] In the process of developing this utility model, the applicant discovered at least the following problems in the prior art:

[0005] Existing data acquisition equipment has limitations, with a single data transmission channel, which cannot adequately meet the needs of different application scenarios. Utility Model Content

[0006] The purpose of this invention is to provide a control circuit for an IoT data acquisition device, addressing the limitations of existing acquisition devices, such as the single data transmission channel, which fails to adequately meet the needs of diverse application scenarios. The preferred technical solutions provided by this invention offer numerous technical benefits, detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides a control circuit for an Internet of Things (IoT) data acquisition device, including a microcontroller, a communication module, a power supply module, and an interface module. The communication module, power supply module, and interface module are all connected to the microcontroller. The microcontroller is connected to multiple external monitoring sensors through the interface module. The interface module is used to acquire data collected by the multiple external monitoring sensors and send the data to the microcontroller. The communication module is used to transmit the data received by the microcontroller to a terminal device via 4G transmission or satellite transmission. The power supply module is used to supply power to the microcontroller, communication module, and interface module.

[0009] Optionally, the microcontroller is an STM32F103-LQFP64.

[0010] Optionally, the communication module includes a 4G communication submodule, a Bluetooth and satellite communication submodule, and a level conversion protection unit. The 4G communication submodule is communicatively connected to the level conversion protection unit, and both the Bluetooth and satellite communication submodule and the level conversion protection unit are communicatively connected to the microcontroller. The 4G communication submodule is model EC800M-CN, the Bluetooth and satellite communication submodule is model TB-04, and the level conversion protection unit is model TXS0108E.

[0011] Optionally, the seventh pin of the 4G communication submodule is connected to the first pin of the level conversion protection unit, the eighteenth pin of the 4G communication submodule is connected to the third pin of the level conversion protection unit, and the seventeenth pin of the 4G communication submodule is connected to the fourth pin of the level conversion protection unit.

[0012] The seventeenth pin of the level conversion protection unit is connected to the sixteenth pin of the microcontroller, the eighteenth pin of the level conversion protection unit is connected to the seventeenth pin of the microcontroller, and the twentieth pin of the level conversion protection unit is connected to the twenty-first pin of the microcontroller.

[0013] The first pin of the Bluetooth and satellite communication submodule is connected to an antenna connector, the second pin of the Bluetooth and satellite communication submodule is connected to the twentieth pin of the microcontroller, the thirteenth pin of the Bluetooth and satellite communication submodule is connected to the forty-second pin of the microcontroller, and the fourteenth pin of the Bluetooth and satellite communication submodule is connected to the forty-third pin of the microcontroller.

[0014] Optionally, the communication module further includes a positioning submodule and a SIM card. The positioning submodule is of model SIM28ML. The second pin of the positioning submodule is connected to the 54th pin of the microcontroller, and the third pin of the positioning submodule is connected to the 53rd pin of the microcontroller. The second and third pins of the SIM card are both connected to the 11th and 14th pins of the 4G communication submodule, respectively, and the sixth pin of the SIM card is connected to the 13th pin of the 4G communication submodule.

[0015] Optionally, the power module includes a battery management chip, a power input unit, a power supply protection unit, and a power output unit. The power input unit and the power supply protection unit are both connected to the battery management chip. The power supply protection unit is connected to the power output unit, and the power output unit is connected to the microcontroller. The battery management chip is connected to the power supply unit through the power input unit, and the battery management chip supplies power to the microcontroller through the power supply protection unit and the power output unit. The battery management chip is model BQ24610-QFN24.

[0016] Optionally, the power input unit includes a first input unit and a second input unit. The first input unit is connected to the battery management chip through a first pin, a second pin, and a third pin. The second input unit is connected to the battery management chip through a fifth pin, a ninth pin, and an eighth pin.

[0017] The power supply protection unit is connected to the battery management chip via pins 12, 23, 14, 18, 19, 20, 21, 22, and 23.

[0018] The power output unit is connected to the power protection unit via the BAT_IN pin of the power protection unit, and the power output unit is connected to the microcontroller via the PWEN_SIM pin of the microcontroller.

[0019] Optionally, the control circuit further includes a storage device, the storage device being model W25Q128FVSIG; the first pin of the storage device is connected to the thirty-third pin of the microcontroller, the second pin of the storage device is connected to the thirty-fifth pin of the microcontroller, the fifth pin of the storage device is connected to the thirty-sixth pin of the microcontroller, and the sixth pin of the storage device is connected to the thirty-fourth pin of the microcontroller.

[0020] Optionally, the control circuit further includes a real-time clock module, the real-time clock module being model CF8563T; the third pin of the real-time clock module is connected to the fourteenth pin of the microcontroller, the fifth pin of the real-time clock module is connected to the thirtieth pin of the microcontroller, and the sixth pin of the real-time clock module is connected to the twenty-ninth pin of the microcontroller.

[0021] Optionally, the control circuit further includes a button module connected to pin 40 of the microcontroller, the button module being used to start the acquisition device.

[0022] Implementing one of the above-described technical solutions of this utility model has the following advantages or beneficial effects:

[0023] This invention transmits data via satellite or 4G through a communication module, offering versatility, improving data transmission accuracy, and meeting diverse application scenarios. Furthermore, it connects to multiple external monitoring sensors through an interface module to acquire data collected by these sensors, allowing for the integration of different external sensors according to usage requirements, making the data acquisition device suitable for various application scenarios. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0026] Figure 2 This is a circuit diagram of the microcontroller according to an embodiment of the present invention;

[0027] Figure 3 This is a circuit diagram of the 4G communication submodule according to an embodiment of the present invention;

[0028] Figure 4 This is a circuit diagram of the Bluetooth and satellite communication submodule according to an embodiment of the present invention;

[0029] Figure 5 This is a circuit diagram of the level conversion protection unit according to an embodiment of the present utility model;

[0030] Figure 6 This is a circuit diagram of the positioning submodule according to an embodiment of the present invention;

[0031] Figure 7 This is a circuit diagram of the SIM card according to an embodiment of the present invention;

[0032] Figure 8 This is a circuit diagram of the battery management chip, power input unit, and power protection unit in the power module of this utility model embodiment;

[0033] Figure 9 This is a circuit diagram of the power output unit according to an embodiment of the present utility model;

[0034] Figure 10 This is a circuit diagram of the storage device according to an embodiment of the present invention;

[0035] Figure 11 This is a circuit diagram of the real-time clock module according to an embodiment of the present invention;

[0036] Figure 12 This is a circuit diagram of the button module according to an embodiment of the present invention. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be adopted to implement this utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of this utility model disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] To illustrate the technical solution described in this utility model, specific embodiments are described below, showing only the parts related to the embodiments of this utility model.

[0040] Example 1:

[0041] like Figure 1As shown, this utility model provides a control circuit for an IoT data acquisition device, including a microcontroller, a communication module, a power supply module, and an interface module. The communication module, power supply module, and interface module are all connected to the microcontroller. The microcontroller connects to multiple external monitoring sensors through the interface module, which acquires data from the external sensors and sends the data to the microcontroller. The communication module transmits the data received by the microcontroller to the terminal device via 4G transmission or satellite transmission. The power supply module provides power to the microcontroller, communication module, and interface module. Specifically, the microcontroller, as a control device, primarily controls and monitors various functions of the electronic device and system, ensuring the normal operation of each module. In this embodiment, the microcontroller is an STM32F103-LQFP64. The microcontroller is connected to the interface module, which in turn connects to a connector on the acquisition device. Multiple external monitoring sensors are connected to the acquisition device through connectors to monitor the environmental conditions of the external sensors and convert the acquired data through the interface module before sending it to the microcontroller. External monitoring sensors include at least one of the following: temperature sensor, humidity sensor, flow rate sensor, flow velocity sensor, water level sensor, water pressure sensor, crack sensor, displacement sensor, and deformation sensor, which expands the application scenarios of the data acquisition equipment. The communication module connects to the microcontroller, which controls the communication module to transmit the acquired data to the terminal device via 4G transmission or satellite launch, improving data transmission flexibility and expanding the application scenarios of the data acquisition equipment. The power module supplies power to the microcontroller and, through the microcontroller, provides 3.3V power to the communication module and interface module.

[0042] This invention transmits data via satellite or 4G through a communication module, offering versatility, improving data transmission accuracy, and meeting diverse application scenarios. Furthermore, it connects to multiple external monitoring sensors through an interface module to acquire data collected by these sensors, allowing for the integration of different external sensors according to usage requirements, making the data acquisition device suitable for various application scenarios.

[0043] As an optional implementation method, such as Figures 2-5As shown, the communication module includes a 4G communication submodule U6A, a Bluetooth and satellite communication submodule M1, and a level conversion protection unit U12. The 4G communication submodule U6A and the level conversion protection unit U12 are communicatively connected. Both the Bluetooth and satellite communication submodule M1 and the level conversion protection unit U12 are communicatively connected to the microcontroller. The model number of the 4G communication submodule U6A is EC800M-CN, the model number of the Bluetooth and satellite communication submodule M1 is TB-04, and the model number of the level conversion protection unit U12 is TXS0108E. Specifically, the communication module includes the 4G communication submodule U6A and the Bluetooth and satellite communication submodule M1. Data can be transmitted through either the Bluetooth and satellite communication submodule M1 or the 4G communication submodule U6A. The 4G communication submodule U6A is communicatively connected to the microcontroller through the level conversion protection unit U12. The level conversion protection unit U12 is used to convert the voltage and signal between the 4G communication submodule U6A and the microcontroller, enabling signal transmission between them.

[0044] As an optional implementation, pin 7 of the 4G communication submodule U6A is connected to pin 1 of the level conversion protection unit U12, pin 18 of the 4G communication submodule U6A is connected to pin 3 of the level conversion protection unit U12, and pin 17 of the 4G communication submodule U6A is connected to pin 4 of the level conversion protection unit U12. Pin 17 of the level conversion protection unit U12 is connected to pin 16 of the microcontroller, pin 18 of the level conversion protection unit U12 is connected to pin 17 of the microcontroller, and pin 20 of the level conversion protection unit U12 is connected to pin 21 of the microcontroller. An antenna connector is connected to pin 1 of the Bluetooth and satellite communication submodule M1, pin 2 of the Bluetooth and satellite communication submodule M1 is connected to pin 20 of the microcontroller, pin 13 of the Bluetooth and satellite communication submodule M1 is connected to pin 42 of the microcontroller, and pin 14 of the Bluetooth and satellite communication submodule M1 is connected to pin 43 of the microcontroller. Specifically, the 4G communication submodule U6A is connected to the level conversion protection unit U12 via the 4G_PWRKEY, 4G_TXD_1.8, and 4G_RXD_1.8 pins. The level conversion protection unit U12 is connected to the microcontroller via the SIM_RXD, SIM_TXD, and SIM_PWRKEY pins. The level conversion protection unit U12 is used for bidirectional level conversion between different power supply voltages and can also perform signal conversion between devices with different power levels. In this embodiment, the level conversion protection unit U12 converts the voltage and signal of the data received from the microcontroller before sending it to the 4G communication submodule U6A, which then transmits it to the terminal device, ensuring correct data transmission. An antenna connector is connected to the first pin of the Bluetooth and satellite communication submodule M1, which is then connected to the communication antenna to enhance the signal. The Bluetooth and satellite communication submodule M1 communicates with the microcontroller through pins 13 and 14. The Bluetooth and satellite communication submodule M1 receives control signals and transmitted data sent by the microcontroller through pin 13, and sends information fed back by the terminal device to the microcontroller through pin 14.

[0045] As an optional implementation method, such as Figure 6 and Figure 7As shown, the communication module also includes a positioning submodule U8 and a SIM card. The positioning submodule U8 is model SIM28ML. Its second pin is connected to the 54th pin of the microcontroller, and its third pin is connected to the 53rd pin. The second and third pins of the SIM card are connected to the 11th and 14th pins of the 4G communication submodule U6A, respectively, and its sixth pin is connected to the 13th pin. Specifically, the communication module also includes a positioning submodule U8. GPS (Global Positioning System) is connected to the 11th and 14th pins of the positioning submodule U8. GPS allows the device to locate its geographical position. While the communication module transmits environmental data collected by external monitoring sensors to the terminal device, it simultaneously transmits the location information collected by the positioning submodule U8 to the terminal device. This facilitates accurate data acquisition and statistical analysis by the terminal device, enabling users to perform data analysis. The positioning submodule U8 transmits the collected geographical location information through its second pin and receives control signals from the microcontroller through its third pin. The communication module also includes a SIM card, which is connected to the 4G communication submodule U6A for network access. The SIM card is used for identity verification, information storage, encrypted communication, and network switching, and is not specifically limited in this embodiment. Furthermore, the communication module can also provide wireless communication functionality, enabling wireless data transmission.

[0046] As an optional implementation method, such as Figure 8 and Figure 9 As shown, the power module includes a battery management chip U20, a power input unit, a power protection unit, and a power output unit. The power input unit and the power protection unit are both connected to the battery management chip U20. The power protection unit is connected to the power output unit, which is connected to the microcontroller. The battery management chip U20 is connected to the power supply unit via the power input unit, and it supplies power to the microcontroller through the power protection unit and the power output unit. The model number of the battery management chip U20 is BQ24610-QFN24. Specifically, the power module's input voltage range is 10V-20V. The battery management chip U20 is connected to the power supply unit of an external device via the power input unit; the external device's power supply unit is either an external battery or AC power. The power protection unit is located between the battery management chip U20 and the power output unit. The power protection unit is used for power management, managing the output power, amplifying signals, and protecting the power output unit. The power output unit supplies power to the microcontroller.

[0047] As an optional implementation, the power input unit includes a first input unit and a second input unit. The first input unit is connected to the battery management chip U20 via pins 1, 2, and 3 of the battery management chip U20. The second input unit is connected to the battery management chip U20 via pins 5, 9, and 8 of the battery management chip U20. The power protection unit is connected to the battery management chip U20 via pins 12, 23, 14, 18, 19, 20, 21, 22, and 23 of the battery management chip U20. The power output unit is connected to the power protection unit via the BAT_IN pin of the power protection unit. The power output unit is connected to the microcontroller via the PWEN_SIM pin of the microcontroller. Specifically, the first input unit is connected to pins 1, 2, and 3 of the battery management chip U20 to form a first power input terminal (POWERIN), used to connect to the peripheral power supply. The second input unit is connected to pins 5, 9, and 8 of the battery management chip U20 to form a second power input terminal (POWERIN), used to connect to the peripheral power supply. A temperature measurement module (NTC) is connected to pin 6 of the battery management chip U20. This module measures the temperature of the power module and uses the measured temperature information to control the power input unit and the power supply protection unit, thus achieving current protection. The power supply protection unit contains multiple MOSFETs, capacitors, and resistors for circuit protection. The power supply protection unit connects to the power output unit via the BAT_IN pin, and the power output unit then supplies power to the microcontroller.

[0048] As an optional implementation method, such as Figure 10 As shown, the control circuit also includes a storage device U2, model W25Q128FVSIG. The first pin of storage device U2 is connected to the thirty-third pin of the microcontroller, the second pin to the thirty-fifth pin, the fifth pin to the thirty-sixth pin, and the sixth pin to the thirty-fourth pin. Specifically, the microcontroller and storage device U2 communicate using the SPI protocol. Storage device U2 stores data collected by multiple external monitoring sensors. Data collected by the microcontroller from these sensors can be transferred to storage device U2 via its first, second, fifth, and sixth pins. Alternatively, the data stored in storage device U2 can be output to the microcontroller, which then controls the communication module to send the data to the terminal device.

[0049] As an optional implementation method, such as Figure 11As shown, the control circuit also includes a real-time clock module U3, model CF8563T. Pin 3 of the real-time clock module U3 is connected to pin 14 of the microcontroller, pin 5 is connected to pin 30 of the microcontroller, and pin 6 is connected to pin 29 of the microcontroller. Specifically, a positive temperature coefficient thermistor (PRTC) is connected to pin 8 of the real-time clock module U3 for overcurrent protection and surge current suppression. Pin 3 of the real-time clock module U3 is the INT pin (interrupt output pin), used to trigger interrupt events. Pin 5 of the real-time clock module U3 is the SDA pin (serial data input / output pin), used for receiving and sending data via the I2C bus. Pin 6 of the real-time clock module U3 is the SCL pin (serial clock input pin), which works in conjunction with the SDA pin to complete the I2C communication process. Pin 7 of the real-time clock module U3 provides an open-drain clock output for clock synchronization with external devices. The real-time clock module U3 can realize high-precision clock timing, timestamp storage and I2C communication functions, and supports alarms to microcontrollers.

[0050] As an optional implementation method, such as Figure 12 As shown, the control circuit also includes a button module, which is connected to pin 40 of the microcontroller. The button module is used to start the data acquisition device. Specifically, the button module is connected to the microcontroller through pin KEY1. When the button module is pressed, pin KEY1 goes high, and the microcontroller controls the data acquisition device to work, perform environmental detection, and send the detected data to the terminal device. When the button module is not pressed, pin KEY1 goes low, and the microcontroller controls the data acquisition device to shut down.

[0051] The embodiment is merely a special case and does not indicate that this utility model is implemented in such a way.

[0052] The above description is merely a preferred embodiment of the present utility model. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Furthermore, under the teachings of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present utility model.

Claims

1. A control circuit of an Internet of Things harvesting device, characterized in that, The application relates to a monitoring device for monitoring a plurality of external monitoring sensors, comprising a microcontroller, a communication module, a power module and an interface module, wherein the communication module, the power module and the interface module are connected with the microcontroller, the microcontroller is connected with a plurality of external monitoring sensors through the interface module, the interface module is used for acquiring data collected by the plurality of external monitoring sensors and sending the data to the microcontroller, the communication module is used for sending the data received by the microcontroller to a terminal device through 4G transmission or satellite transmission, and the power module is used for supplying power to the microcontroller, the communication module and the interface module.

2. The control circuit of the IoT harvesting device of claim 1, wherein, The model of the microcontroller is STM32F103-LQFP64.

3. The control circuit of the IoT harvesting device of claim 2, wherein, The communication module comprises a 4G communication submodule, a Bluetooth and satellite communication submodule and a level conversion protection unit, the 4G communication submodule is in communication connection with the level conversion protection unit, the Bluetooth and satellite communication submodule and the level conversion protection unit are in communication connection with the microcontroller, the model of the 4G communication submodule is EC800M-CN, the model of the Bluetooth and satellite communication submodule is TB-04, and the model of the level conversion protection unit is TXS0108E.

4. The control circuit of the IoT harvesting device of claim 3, wherein, The seventh pin of the 4G communication submodule is connected with the first pin of the level conversion protection unit, the eighteenth pin of the 4G communication submodule is connected with the third pin of the level conversion protection unit, and the seventeenth pin of the 4G communication submodule is connected with the fourth pin of the level conversion protection unit. The seventeenth pin of the level conversion protection unit is connected with the sixteenth pin of the microcontroller, the eighteenth pin of the level conversion protection unit is connected with the seventeenth pin of the microcontroller, and the twentieth pin of the level conversion protection unit is connected with the twenty-first pin of the microcontroller. The first pin of the Bluetooth and satellite communication submodule is connected with an antenna connector, the second pin of the Bluetooth and satellite communication submodule is connected with the twentieth pin of the microcontroller, the thirteenth pin of the Bluetooth and satellite communication submodule is connected with the forty-second pin of the microcontroller, and the fourteenth pin of the Bluetooth and satellite communication submodule is connected with the forty-third pin of the microcontroller.

5. The control circuit of the IoT harvesting device of claim 3, wherein, The communication module further comprises a positioning submodule and a SIM card, the model of the positioning submodule is SIM28ML, the second pin of the positioning submodule is connected with the fifty-fourth pin of the microcontroller, and the third pin of the positioning submodule is connected with the fifty-third pin of the microcontroller; the second pin and the third pin of the SIM card are connected with the eleventh pin and the fourteenth pin of the 4G communication submodule, and the sixth pin of the SIM card is connected with the thirteenth pin of the 4G communication submodule.

6. The control circuit of the IoT harvesting device of claim 1, wherein, The power module comprises a battery management chip, a power input unit, a power supply protection unit and a power output unit, the power input unit and the power supply protection unit are connected with the battery management chip, the power supply protection unit is connected with the power output unit, and the power output unit is connected with the microcontroller; the battery management chip is connected with the power supply unit through the power input unit, and the battery management chip supplies power to the microcontroller through the power supply protection unit and the power output unit; the model of the battery management chip is BQ24610-QFN24.

7. The control circuit of the IoT harvesting device according to claim 6, wherein, The power input unit comprises a first input unit and a second input unit, the first input unit is connected with the battery management chip through a first pin, a second pin and a third pin of the battery management chip; the second input unit is connected with the battery management chip through a fifth pin, a ninth pin and an eighth pin of the battery management chip; The power supply protection unit is connected with the battery management chip through a twelfth pin, a twenty-third pin, a fourteenth pin, an eighteenth pin, a nineteenth pin, a twentieth pin, a twenty-first pin, a twenty-second pin and a twenty-third pin of the battery management chip; The power output unit is connected with the power supply protection unit through a BAT_IN pin of the power supply protection unit, and the power output unit is connected with the microcontroller through a PWEN_SIM pin of the microcontroller.

8. The control circuit of the IoT harvesting device of claim 1, wherein, The control circuit further comprises a memory device, and the model of the memory device is W25Q128FVSIG; a first pin of the memory device is connected with a thirty-third pin of the microcontroller, a second pin of the memory device is connected with a thirty-fifth pin of the microcontroller, a fifth pin of the memory device is connected with a thirty-sixth pin of the microcontroller, and a sixth pin of the memory device is connected with a thirty-fourth pin of the microcontroller.

9. The control circuit of the IoT harvesting device of claim 1, wherein, The control circuit further comprises a real-time clock module, and the model of the real-time clock module is CF8563T; a third pin of the real-time clock module is connected with a fourteenth pin of the microcontroller, a fifth pin of the real-time clock module is connected with a thirtieth pin of the microcontroller, and a sixth pin of the real-time clock module is connected with a twenty-ninth pin of the microcontroller.

10. The control circuit of the IoT harvesting device according to any one of claims 1-9, wherein, The control circuit further comprises a key module, the key module is connected with a fortieth pin of the microcontroller, and the key module is used for starting the acquisition device.

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