4G mini gateway circuit powered by USB

Abstract

The utility model discloses a 4G mini gateway circuit powered by a USB. The 4G mini gateway circuit comprises a power supply circuit, a 2.4 G ultra-low power consumption Bluetooth module, a storage circuit, a key circuit, an LED indicating lamp circuit and an LTE module circuit. According to the utility model, the USB interface is used for power supply, the compatibility is strong, the USB communication is supported, the linkage with other systems is realized, the data local storage capability is provided, the data loss is avoided, the LTE Cat 1 bis is supported, the LTE network full coverage is realized, the data interaction can be realized by virtue of the existing base station, the additional deployment is not needed, the cost is low, the global communication can be realized, and the Bluetooth module and the LTE module adopt the modular design, so that the cost is low. Related circuit modules can be replaced according to requirements of users in different regions, structural design does not need to be changed, cost can be saved to the maximum extent while the requirements of the users are met, and the whole product design is more economical and environmentally friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of gateway circuits, and in particular relates to a USB-powered 4G mini gateway circuit. Background Art

[0002] In smart building offices and smart medical care, environment, personnel, and equipment information can be collected in real time and reported to the cloud server in real time. By linking with other systems, the intelligence, dataization, and networking capabilities of the management system can be improved.

[0003] In the field of smart manufacturing and outdoor construction sites, the tracking, status monitoring, and location status data of important assets and equipment need to be known by administrators in real time. The equipment operation status, production progress information, and environmental data can be collected and reported to the server in real time. Supervisors can monitor relevant parameters in real time to ensure that each operation can proceed normally. Individual abnormal emergencies can be handled in a timely manner to reduce property losses.

[0004] The existing implementation scheme has a single communication mode, large product size, poor network security and reliability, and is vulnerable to attacks and decryption. In addition, the platform is complicated to build and use, and it is impossible to achieve real-time data acquisition and management. The power supply mode has poor compatibility, high power consumption, and no local data storage capability, which easily causes data loss. In addition, the main control circuit and module circuit adopt an integrated design, which has low scalability and is not conducive to cost control. Utility Model Content

[0005] In view of this, the main purpose of the utility model is to provide a USB-powered 4G mini gateway circuit.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] Embodiment 1 of the present invention provides a USB-powered 4G mini gateway circuit, including a power circuit, a 2.4G ultra-low power consumption Bluetooth module, a storage circuit, a key circuit, an LED indicator circuit, and an LTE module circuit. The power circuit outputs a 3.8V voltage to power the 2.4G ultra-low power consumption Bluetooth module, the storage circuit, the key circuit, the LED indicator circuit, and the LTE module circuit. The 2.4G ultra-low power consumption Bluetooth module is respectively communicatively connected with the storage circuit and the LTE module circuit, the output end of the 2.4G ultra-low power consumption Bluetooth module is connected with the LED indicator circuit, and the output end of the key circuit is connected with the input end of the 2.4G ultra-low power consumption Bluetooth module.

[0008] In the above scheme, the power supply circuit includes a USB interface circuit and a DC-DC conversion circuit, and the power output end of the USB interface circuit is converted into 3.8V by the DC-DC conversion circuit and then supplied.

[0009] In the above scheme, the USB interface circuit includes a USB interface, a bidirectional diode, an ESD diode, and a common-mode inductor. The VBUS end of the USB interface is connected in series with a ninth resistor and is respectively connected to the first end of the bidirectional diode and the VCC end of the ESD diode. The second end of the bidirectional diode is grounded. The IO2 end of the ESD diode is respectively connected to the D- end of the USB interface and the first end of the common-mode inductor. The IO1 end of the ESD diode is respectively connected to the D+ end of the USB interface and the second end of the common-mode inductor.

[0010] In the above scheme, the DC-DC conversion circuit includes a buck chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a twenty-seventh capacitor, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirtieth capacitor, a thirty-first capacitor, and a fifth inductor. The first end of the eleventh resistor is respectively connected to the second end of the ninth resistor, the first end of the twenty-seventh capacitor, the first end of the twenty-eighth capacitor, and the IN end of the buck chip. The second end of the eleventh resistor is respectively connected to the first end of the twelfth resistor and the EN end of the buck chip. The second end of the twelfth resistor is connected to the P1.09 end of the 2.4G ultra-low power Bluetooth chip. The buck chip The FB end of the chip is respectively connected to the first end of the fourteenth resistor, the first end of the fifteenth resistor and the first end of the twenty-ninth capacitor, the second end of the fifteenth resistor is respectively connected to the 3.8V power supply output end and the second end of the twenty-ninth capacitor, the BST end of the buck chip is connected in series with the thirteenth resistor and then connected to the first end of the thirtieth capacitor, the second end of the thirtieth capacitor is respectively connected to the SW end of the buck chip and the first end of the fifth inductor, the second end of the fifth inductor is respectively connected to the 3.8V power supply output end and the first end of the thirty-first capacitor, the second end of the twenty-seventh capacitor, the second end of the twenty-eighth capacitor, the second end of the thirty-first capacitor and the second end of the fourteenth resistor are all grounded.

[0011] In the above solution, the 2.4G ultra-low power consumption Bluetooth module includes a 2.4G ultra-low power consumption Bluetooth chip, and the 3.8V power output terminal is connected to the VCC terminal of the 2.4G ultra-low power consumption Bluetooth chip to power the 2.4G ultra-low power consumption Bluetooth chip.

[0012] In the above scheme, the 2.4G ultra-low power consumption Bluetooth module also includes an antenna circuit, which includes a third inductor, a fourth inductor, a fourteenth capacitor, a fifteenth capacitor, an eighteenth capacitor, a seventeenth capacitor, and a first antenna. The first end of the third inductor is respectively connected to the first end of the fourteenth capacitor and the ANT end of the 2.4G ultra-low power consumption Bluetooth chip, the second end of the third inductor is respectively connected to the first end of the fifteenth capacitor, the first end of the eighteenth capacitor and the first end of the fourth inductor, the second end of the fourth inductor is respectively connected to the first end of the seventeenth capacitor and the first antenna, and the second end of the fourteenth capacitor, the second end of the fifteenth capacitor, the second end of the eighteenth capacitor, and the second end of the seventeenth capacitor are all grounded.

[0013] In the above scheme, the storage circuit includes a storage chip U1, the 3.8V power output terminal is connected to the VCC terminal of the storage chip, the DO terminal of the storage chip is connected to the P1.02 terminal of the 2.4G ultra-low power consumption Bluetooth chip, the CS terminal of the storage chip is connected to the P1.01 terminal of the 2.4G ultra-low power consumption Bluetooth chip, the CLK terminal of the storage chip is connected to the P1.04 terminal of the 2.4G ultra-low power consumption Bluetooth chip, and the DIO terminal of the storage chip is connected to the P1.06 terminal of the 2.4G ultra-low power consumption Bluetooth chip.

[0014] In the above scheme, the key circuit includes an eighth resistor and a switch, the first end of the eighth resistor is connected to the 3.8V power supply output end, the second end of the eighth resistor is respectively connected to the P0.04 end of the 2.4G ultra-low power consumption Bluetooth chip and the first end of the switch, and the second end of the switch is grounded.

[0015] In the above scheme, the LED indicator light circuit includes a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fifth resistor, a sixth resistor, and a seventh resistor. The 3.8V power supply output end is respectively connected to the positive electrode of the first light-emitting diode, the positive electrode of the second light-emitting diode, and the positive electrode of the third light-emitting diode. The cathode of the first light-emitting diode is connected in series with the fifth resistor and then connected to the P0.08 end of the 2.4G ultra-low power consumption Bluetooth chip. The cathode of the second light-emitting diode is connected in series with the sixth resistor and then connected to the P0.06 end of the 2.4G ultra-low power consumption Bluetooth chip. The cathode of the third light-emitting diode is connected in series with the seventh resistor and then connected to the P0.12 end of the 2.4G ultra-low power consumption Bluetooth chip.

[0016] In the above scheme, the LTE module circuit includes an LTE module, a thirty-second capacitor, a thirty-third capacitor, and a sixteenth resistor. The 3.8V power supply output end is respectively connected to the VBAT_RF end and the VBAT_BB end of the LTE module, the first end of the thirty-second capacitor is respectively connected to the first end of the sixteenth resistor and the ANT_MAIN end of the LTE module, the second end of the sixteenth resistor is respectively connected to the first end of the thirty-third capacitor and the second antenna, the second end of the thirty-second capacitor and the second end of the thirty-third capacitor are both grounded, the PWRKFY end of the LTE module is connected to the P0.15 end of the 2.4G ultra-low power consumption Bluetooth chip, the Module_Reset end of the LTE module is connected to the P0.13 end of the 2.4G ultra-low power consumption Bluetooth chip, and the W_DISABLE# end of the LTE module is connected to the P0.31 end of the 2.4G ultra-low power consumption Bluetooth chip.

[0017] Compared with the prior art, the utility model adopts a USB interface for power supply, has strong compatibility, supports USB communication to achieve linkage with other systems, has the ability to store data locally to avoid data loss, supports LTE Cat 1 bis, achieves full coverage of the LTE network, can use existing base stations to achieve data interaction, does not require additional deployment, has low cost, and can achieve global communication. The Bluetooth module and the LTE module adopt a modular design, and the relevant circuit modules can be replaced according to the needs of users in different regions without changing the structural design. While meeting user needs, it can achieve maximum cost savings, making the entire product design more economical and green. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to disclose a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the 2.4G ultra-low power consumption Bluetooth module according to an embodiment of the present utility model;

[0020] Figure 2 It is a structural schematic diagram of the storage circuit described in the embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the key circuit described in the embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the LED indicator light circuit according to an embodiment of the utility model;

[0023] Figure 5This is a schematic diagram of the structure of the USB interface circuit described in the embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the DC-DC conversion circuit described in the embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the LTE module circuit described in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of more restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element.

[0029] The utility model embodiment provides a USB powered 4G mini gateway circuit, such as Figure 1-7As shown, it includes a power supply circuit, a 2.4G ultra-low power consumption Bluetooth module, a storage circuit, a button circuit, an LED indicator light circuit, and an LTE module circuit. The power supply circuit outputs a 3.8V voltage to supply power to the 2.4G ultra-low power consumption Bluetooth module, the storage circuit, the button circuit, the LED indicator light circuit, and the LTE module circuit. The 2.4G ultra-low power consumption Bluetooth module is respectively connected to the storage circuit and the LTE module circuit for communication. The output end of the 2.4G ultra-low power consumption Bluetooth module is connected to the LED indicator light circuit, and the output end of the button circuit is connected to the input end of the 2.4G ultra-low power consumption Bluetooth module.

[0030] like Figure 1 , Figure 5 and Figure 6 As shown, the power supply circuit includes a USB interface circuit and a DC-DC conversion circuit, and the power output end of the USB interface circuit is converted into 3.8V by the DC-DC conversion circuit and then supplied.

[0031] like Figure 1 , Figure 5 and Figure 6 As shown, the USB interface circuit includes a USB interface J1, a bidirectional diode D1, an ESD diode D2, and a common-mode inductor L6. The VBUS end of the USB interface J1 is connected in series with a ninth resistor R9 and is respectively connected to the first end of the bidirectional diode D1 and the VCC end of the ESD diode D2. The second end of the bidirectional diode D1 is grounded. The IO2 end of the ESD diode D2 is respectively connected to the D- end of the USB interface J1 and the first end of the common-mode inductor L6. The IO1 end of the ESD diode D2 is respectively connected to the D+ end of the USB interface J1 and the second end of the common-mode inductor L6.

[0032] like Figure 1 , Figure 5 and Figure 6As shown, the DC-DC conversion circuit includes a buck chip U3, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, a twenty-ninth capacitor C29, a thirtieth capacitor C30, a thirty-first capacitor C31, and a fifth inductor L5. The first end of the eleventh resistor R11 is respectively connected to the second end of the ninth resistor R9, the first end of the twenty-seventh capacitor C27, the first end of the twenty-eighth capacitor C28 and the IN end of the buck chip U3. The second end of the eleventh resistor R11 is respectively connected to the first end of the twelfth resistor R12 and the EN end of the buck chip U3. The second end of the twelfth resistor R12 is connected to the P1.09 end of the 2.4G ultra-low power Bluetooth chip MU1. The FB end of the buck chip U3 is respectively connected to the first end of the fourteenth resistor R14, the first end of the fifteenth resistor R15 and the first end of the twenty-ninth capacitor C29, the second end of the fifteenth resistor R15 is respectively connected to the 3.8V power supply output end and the second end of the twenty-ninth capacitor C29, the BST end of the buck chip U3 is connected in series with the thirteenth resistor R13 and then connected to the first end of the thirtieth capacitor C30, the second end of the thirtieth capacitor C30 is respectively connected to the SW end of the buck chip U3 and the first end of the fifth inductor L5, the second end of the fifth inductor L5 is respectively connected to the 3.8V power supply output end and the first end of the thirty-first capacitor C31, the second end of the twenty-seventh capacitor C27, the second end of the twenty-eighth capacitor C28, the second end of the thirty-first capacitor C31 and the second end of the fourteenth resistor R14 are all grounded.

[0033] In the above scheme, after the USB interface circuit is connected to the power supply, the voltage is transmitted to the DC-DC conversion circuit, and the DC-DC conversion circuit steps down the voltage to 3.8V and then supplies power to other modules through the 3.8V power output terminal.

[0034] like Figure 1 As shown, the 2.4G ultra-low power consumption Bluetooth module includes a 2.4G ultra-low power consumption Bluetooth chip MU1, and the power output end of the power supply circuit is connected to the VCC end of the 2.4G ultra-low power consumption Bluetooth chip MU1 for powering the 2.4G ultra-low power consumption Bluetooth chip MU1.

[0035] like Figure 1As shown, the 2.4G ultra-low power consumption Bluetooth module also includes an antenna circuit, which includes a third inductor L3, a fourth inductor L4, a fourteenth capacitor C14, a fifteenth capacitor C15, an eighteenth capacitor C18, a seventeenth capacitor C17, and a first antenna ANT1. The first end of the third inductor L3 is respectively connected to the first end of the fourteenth capacitor C14 and the ANT end of the 2.4G ultra-low power consumption Bluetooth chip MU1, the second end of the third inductor L3 is respectively connected to the first end of the fifteenth capacitor C15, the first end of the eighteenth capacitor C18 and the first end of the fourth inductor L4, the second end of the fourth inductor L4 is respectively connected to the first end of the seventeenth capacitor C17 and the first antenna ANT1, and the second end of the fourteenth capacitor C14, the second end of the fifteenth capacitor C15, the second end of the eighteenth capacitor C18, and the second end of the seventeenth capacitor C17 are all grounded.

[0036] In the above solution, the first antenna ANT1 is a Bluetooth antenna, and transmits or scans Bluetooth information through the 2.4G Bluetooth antenna.

[0037] like Figure 1 and Figure 2 As shown, the storage circuit includes a storage chip U1, the power output end of the power circuit is connected to the VDD end of the storage chip U1, the DO end of the storage chip U1 is connected to the P1.02 end of the 2.4G ultra-low power consumption Bluetooth chip MU1, the CS end of the storage chip U1 is connected to the P1.01 end of the 2.4G ultra-low power consumption Bluetooth chip MU1, the CLK end of the storage chip U1 is connected to the P1.04 end of the 2.4G ultra-low power consumption Bluetooth chip MU1, and the DIO end of the storage chip U1 is connected to the P1.06 end of the 2.4G ultra-low power consumption Bluetooth chip MU1.

[0038] like Figure 1 and Figure 3 As shown, the key circuit includes an eighth resistor R8 and a switch K1, the first end of the eighth resistor R8 is connected to the power output end of the power circuit, the second end of the eighth resistor R8 is respectively connected to the P0.04 end of the 2.4G ultra-low power consumption Bluetooth chip MU1 and the first end of the switch K1, and the second end of the switch K1 is grounded.

[0039] In the above solution, an IO port is used to connect to the 2.4G ultra-low power Bluetooth chip MU1 for device working mode switching, etc.

[0040] like Figure 1 and Figure 4As shown, the LED indicator light circuit includes a first light emitting diode LED1, a second light emitting diode LED2, a third light emitting diode LED3, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7. The power output end of the power supply circuit is respectively connected to the positive electrode of the first light emitting diode LED1, the positive electrode of the second light emitting diode LED2, and the positive electrode of the third light emitting diode LED3. The cathode of the first light emitting diode LED1 is connected in series with the fifth resistor R5 and then connected to the P0.08 end of the 2.4G ultra-low power consumption Bluetooth chip MU1. The cathode of the second light emitting diode LED2 is connected in series with the sixth resistor R6 and then connected to the P0.06 end of the 2.4G ultra-low power consumption Bluetooth chip MU1. The cathode of the third light emitting diode LED3 is connected in series with the seventh resistor R7 and then connected to the P0.12 end of the 2.4G ultra-low power consumption Bluetooth chip MU1.

[0041] like Figure 1 and Figure 7 As shown, the LTE module circuit includes an LTE module U2, a thirty-second capacitor C32, a thirty-third capacitor C33, and a sixteenth resistor R16, the 3.8V power supply output terminal is respectively connected to the VBAT_RF terminal and the VBAT_BB terminal of the LTE module U2, the first end of the thirty-second capacitor C32 is respectively connected to the first end of the sixteenth resistor R16 and the ANT_MAIN terminal of the LTE module U2, the second end of the sixteenth resistor R16 is respectively connected to the first end of the thirty-third capacitor C33 and the first end of the sixteenth resistor R16. The second antenna ANT2 is connected, the second end of the thirty-second capacitor C32 and the second end of the thirty-third capacitor C33 are both grounded, the PWRKFY end of the LTE module U2 is connected to the P0.15 end of the 2.4G ultra-low power consumption Bluetooth chip MU1, the Module_Reset end of the LTE module U2 is connected to the P0.13 end of the 2.4G ultra-low power consumption Bluetooth chip MU1, and the W_DISABLE# end of the LTE module U2 is connected to the P0.31 end of the 2.4G ultra-low power consumption Bluetooth chip MU1.

[0042] In the above scheme, the MCU1 main control of the 2.4G low-power Bluetooth chip is communicated through UART communication, and the SIM card is communicated through half-duplex communication. It supports LTE Cat 1 bis, achieves full coverage of the LTE network, has a wide range of use, and supports global communication. Information can be reported to the cloud platform and controlled by the cloud platform through the LTE antenna. Managers can obtain data and issue commands through the PC operation interface or mobile phone APP2.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A USB powered 4G mini gateway circuit, characterized in that: It includes a power supply circuit, a 2.4G ultra-low power consumption Bluetooth module, a storage circuit, a key circuit, an LED indicator light circuit, and an LTE module circuit. The power supply circuit outputs a 3.8V voltage to supply power to the 2.4G ultra-low power consumption Bluetooth module, the storage circuit, the key circuit, the LED indicator light circuit, and the LTE module circuit. The 2.4G ultra-low power consumption Bluetooth module is respectively connected to the storage circuit and the LTE module circuit for communication. The output end of the 2.4G ultra-low power consumption Bluetooth module is connected to the LED indicator light circuit, and the output end of the key circuit is connected to the input end of the 2.4G ultra-low power consumption Bluetooth module.

2. The USB-powered 4G mini gateway circuit according to claim 1, characterized in that: The power supply circuit includes a USB interface circuit and a DC-DC conversion circuit. The power output end of the USB interface circuit is converted into 3.8V by the DC-DC conversion circuit and then supplied.

3. The USB-powered 4G mini gateway circuit according to claim 2, characterized in that: The USB interface circuit includes a USB interface, a bidirectional diode, an ESD diode, and a common-mode inductor. The VBUS end of the USB interface is connected in series with a ninth resistor and is respectively connected to the first end of the bidirectional diode and the VCC end of the ESD diode. The second end of the bidirectional diode is grounded. The IO2 end of the ESD diode is respectively connected to the D-end of the USB interface and the first end of the common-mode inductor. The IO1 end of the ESD diode is respectively connected to the D+ end of the USB interface and the second end of the common-mode inductor.

4. The USB-powered 4G mini gateway circuit according to claim 3, characterized in that: The DC-DC conversion circuit includes a buck chip, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a twenty-seventh capacitor, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirtieth capacitor, a thirty-first capacitor, and a fifth inductor. The first end of the eleventh resistor is respectively connected to the second end of the ninth resistor, the first end of the twenty-seventh capacitor, the first end of the twenty-eighth capacitor, and the IN end of the buck chip. The second end of the eleventh resistor is respectively connected to the first end of the twelfth resistor and the EN end of the buck chip. The second end of the twelfth resistor is connected to the P1.09 end of the 2.4G ultra-low power Bluetooth chip. The F end of the buck chip The B terminal is respectively connected to the first end of the fourteenth resistor, the first end of the fifteenth resistor and the first end of the twenty-ninth capacitor, the second end of the fifteenth resistor is respectively connected to the 3.8V power supply output terminal and the second end of the twenty-ninth capacitor, the BST terminal of the buck chip is connected in series with the thirteenth resistor and then connected to the first end of the thirtieth capacitor, the second end of the thirtieth capacitor is respectively connected to the SW terminal of the buck chip and the first end of the fifth inductor, the second end of the fifth inductor is respectively connected to the 3.8V power supply output terminal and the first end of the thirty-first capacitor, the second end of the twenty-seventh capacitor, the second end of the twenty-eighth capacitor, the second end of the thirty-first capacitor and the second end of the fourteenth resistor are all grounded.

5. The USB-powered 4G mini gateway circuit according to claim 4, characterized in that: The 2.4G ultra-low power consumption Bluetooth module includes a 2.4G ultra-low power consumption Bluetooth chip, and the 3.8V power output terminal is connected to the VCC terminal of the 2.4G ultra-low power consumption Bluetooth chip to supply power to the 2.4G ultra-low power consumption Bluetooth chip.

6. The USB-powered 4G mini gateway circuit according to claim 5, characterized in that: The 2.4G ultra-low power consumption Bluetooth module also includes an antenna circuit, which includes a third inductor, a fourth inductor, a fourteenth capacitor, a fifteenth capacitor, an eighteenth capacitor, a seventeenth capacitor, and a first antenna. The first end of the third inductor is respectively connected to the first end of the fourteenth capacitor and the ANT end of the 2.4G ultra-low power consumption Bluetooth chip, the second end of the third inductor is respectively connected to the first end of the fifteenth capacitor, the first end of the eighteenth capacitor, and the first end of the fourth inductor, the second end of the fourth inductor is respectively connected to the first end of the seventeenth capacitor and the first antenna, and the second end of the fourteenth capacitor, the second end of the fifteenth capacitor, the second end of the eighteenth capacitor, and the second end of the seventeenth capacitor are all grounded.

7. The USB-powered 4G mini gateway circuit according to claim 6, characterized in that: The storage circuit includes a storage chip U1, the 3.8V power output end is connected to the VCC end of the storage chip, the DO end of the storage chip is connected to the P1.02 end of the 2.4G ultra-low power consumption Bluetooth chip, the CS end of the storage chip is connected to the P1.01 end of the 2.4G ultra-low power consumption Bluetooth chip, the CLK end of the storage chip is connected to the P1.04 end of the 2.4G ultra-low power consumption Bluetooth chip, and the DIO end of the storage chip is connected to the P1.06 end of the 2.4G ultra-low power consumption Bluetooth chip.

8. The USB-powered 4G mini gateway circuit according to claim 7, characterized in that The key circuit includes an eighth resistor and a switch, the first end of the eighth resistor is connected to the 3.8V power supply output end, the second end of the eighth resistor is respectively connected to the P0.04 end of the 2.4G ultra-low power consumption Bluetooth chip and the first end of the switch, and the second end of the switch is grounded.

9. The USB-powered 4G mini gateway circuit according to claim 8, characterized in that: The LED indicator light circuit includes a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fifth resistor, a sixth resistor, and a seventh resistor. The 3.8V power supply output end is respectively connected to the positive electrode of the first light-emitting diode, the positive electrode of the second light-emitting diode, and the positive electrode of the third light-emitting diode. The cathode of the first light-emitting diode is connected in series with the fifth resistor and then connected to the P0.08 end of the 2.4G ultra-low power consumption Bluetooth chip. The cathode of the second light-emitting diode is connected in series with the sixth resistor and then connected to the P0.06 end of the 2.4G ultra-low power consumption Bluetooth chip. The cathode of the third light-emitting diode is connected in series with the seventh resistor and then connected to the P0.12 end of the 2.4G ultra-low power consumption Bluetooth chip.

10. The USB-powered 4G mini gateway circuit according to claim 9, characterized in that: The LTE module circuit includes an LTE module, a thirty-second capacitor, a thirty-third capacitor, and a sixteenth resistor. The 3.8V power supply output end is respectively connected to the VBAT_RF end and the VBAT_BB end of the LTE module, the first end of the thirty-second capacitor is respectively connected to the first end of the sixteenth resistor and the ANT_MAIN end of the LTE module, the second end of the sixteenth resistor is respectively connected to the first end of the thirty-third capacitor and the second antenna, the second end of the thirty-second capacitor and the second end of the thirty-third capacitor are both grounded, the PWRKFY end of the LTE module is connected to the P0.15 end of the 2.4G ultra-low power consumption Bluetooth chip, the Module_Reset end of the LTE module is connected to the P0.13 end of the 2.4G ultra-low power consumption Bluetooth chip, and the W_DISABLE# end of the LTE module is connected to the P0.31 end of the 2.4G ultra-low power consumption Bluetooth chip.

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