Wireless communication module

Abstract

The utility model discloses a wireless communication module, which relates to the field of wireless communication and is characterized in that when a terminal is normally powered on, a first DCDC module in the wireless communication module reduces and converts a first voltage transmitted by the terminal into a second voltage required by a WIFI communication module; when the terminal is powered on, the second DCDC module reduces the first voltage and converts the first voltage into a fourth voltage required by the standby power supply, and when the terminal is powered off, the first DCDC module reduces the third voltage output by the standby power supply and converts the third voltage into a second voltage, so that the WIFI communication module is normally powered on under the condition that the terminal is not powered on. In other words, when the terminal outputs the first voltage, the first DCDC circuit only needs to reduce and convert the first voltage output by the terminal into the second voltage required by the operation of the WIFI communication module, and secondary voltage conversion is not needed, so that the power consumption of the product is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of wireless communication, and particularly relates to a wireless communication module. Background Art

[0002] For industrial control equipment, especially for major terminals, especially smart meters, the requirements for power consumption of smart meters and supporting wireless communication modules are becoming increasingly strict.

[0003] In the prior art, in the power supply scheme of the wireless communication module supporting the smart meter, most of the power supply schemes of the wireless communication module first convert the voltage output by the smart meter into an intermediate voltage and charge the backup power supply, and then convert the voltage output by the backup power supply into the working voltage required by the wireless communication module. This two-stage step-down method greatly increases the power consumption of the product. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a wireless communication module. In this solution, when the terminal is normally powered on, that is, when the terminal outputs a first voltage, the first DCDC circuit only needs to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module, without the need for secondary voltage conversion, thereby greatly reducing the power consumption of the product.

[0005] To solve the above technical problems, the utility model provides a wireless communication module, including: a terminal interface, a first DCDC module, a WIFI communication module, a second DCDC module, and a backup power supply;

[0006] The input end of the first DCDC module is connected to the terminal through the terminal interface, and is used to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module, and step down the third voltage output by the backup power supply to the second voltage when the terminal does not output the first voltage;

[0007] The input end of the second DCDC module is connected to the terminal through the terminal interface, and the output end is connected to the input end of the backup power supply, and is used to convert the first voltage into the fourth voltage required for the operation of the backup power supply;

[0008] The output end of the backup power supply is connected to the input end of the first DCDC module;

[0009] The WIFI communication module is connected to the output end of the first DCDC module, and the communication port is connected to the terminal, and is used to perform data communication with the terminal when powered on.

[0010] Optionally, the first DCDC module includes: a one-way conduction module, a first filtering module, a DCDC chip, and a second filtering module;

[0011] The positive electrode of the one-way conduction module is connected to the terminal through the terminal interface, and the negative electrode is respectively connected to the first end of the first filtering module and the second end of the backup power supply;

[0012] The second end of the first filtering module is respectively connected to the first end of the current-limiting resistor and the voltage input end of the DCDC chip;

[0013] The voltage output end of the DCDC chip is connected to the second filtering module, and is used to convert the first voltage into the second voltage and convert the third voltage into the second voltage.

[0014] Optionally, it further includes:

[0015] A level conversion circuit, the first end of the level conversion circuit is connected to the level sending port of the terminal interface, the second end is connected to the level receiving port of the terminal interface, the third end is connected to the level sending port of the WIFI communication module, and the fourth end is connected to the level receiving port of the WIFI communication module, and is used to control the level of its own first end to be equal to the level of its own fourth end, and control the level of its own second end to be equal to the level of its own third end.

[0016] Optionally, the level conversion circuit includes: a receiving circuit and a sending circuit; the receiving circuit includes: a first diode, a first resistor, a first capacitor, and a first bidirectional voltage regulator tube; the sending circuit includes: a second bidirectional voltage regulator tube, a second resistor, a third resistor, a first NPN transistor, a fourth resistor, a fifth resistor, a sixth resistor, a second NPN transistor, a seventh resistor, a second capacitor, and a pull-up resistor;

[0017] The cathode of the first diode is connected to the level sending port of the terminal interface, and the anode is respectively connected to the first end of the first resistor and the first end of the first capacitor;

[0018] The second end of the first resistor is connected to a preset power supply;

[0019] The second end of the first capacitor is connected to the ground;

[0020] The anode of the first bidirectional voltage regulator tube is respectively connected to the first end of the first capacitor, the anode of the first diode, the first end of the first resistor, and the level receiving port of the WIFI communication module, and the cathode is connected to the ground;

[0021] The anode of the second bidirectional voltage regulator tube is respectively connected to the level sending port of the WIFI communication module and the first end of the second resistor, and the cathode is connected to the ground;

[0022] The second end of the second resistor is respectively connected to the first end of the third resistor and the base of the first NPN transistor;

[0023] The second end of the third resistor is connected to the ground;

[0024] The collector of the first NPN transistor is connected to the first end of the fourth resistor and the first end of the fifth resistor, and the emitter is connected to the ground;

[0025] The second end of the fourth resistor is connected to the power supply;

[0026] The second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the base of the second NPN transistor;

[0027] The second end of the sixth resistor is connected to the ground;

[0028] The emitter of the second NPN transistor is connected to the ground, and the collector is connected to the first end of the seventh resistor;

[0029] The second end of the seventh resistor is respectively connected to the first end of the second capacitor, the first end of the pull-up resistor, and the level receiving port of the terminal interface;

[0030] The second end of the pull-up resistor is connected to the preset power supply;

[0031] The second end of the second capacitor is connected to the ground.

[0032] Optionally, it further includes:

[0033] A power-down detection circuit, the first end of the power-down detection circuit is connected to the terminal through the terminal interface, the second end is connected to the WIFI communication module, and the power supply end is connected to the output end of the first DCDC module, and is used to output a first signal to the WIFI communication module when receiving the first voltage; output a second signal to the WIFI communication module when not receiving the first voltage.

[0034] Optionally, the power-down detection circuit includes: an eighth resistor, a third NPN transistor, a ninth resistor, a fourth NPN transistor, a tenth resistor, and a first RC filter module;

[0035] The first end of the eighth resistor is connected to the terminal through the terminal interface, and the second end is connected to the base of the third NPN transistor;

[0036] The collector of the third NPN transistor is respectively connected to the first end of the ninth resistor and the base of the fourth NPN transistor, and the emitter is connected to the ground;

[0037] The second end of the ninth resistor is connected to the output end of the first DCDC module;

[0038] The collector of the fourth NPN transistor is respectively connected to the first end of the first RC filtering module and the first end of the tenth resistor, and the emitter is connected to the ground;

[0039] The second end of the tenth resistor is connected to the output end of the first DCDC module;

[0040] The second end of the first RC filtering module is connected to the WIFI communication module.

[0041] Optionally, the second DCDC module includes: an LDO chip, a voltage dividing circuit, and a second diode;

[0042] The VIN terminal of the LDO chip is connected to the terminal through the terminal interface, and the VOUT terminal is connected to the first end of the voltage dividing circuit, and is used for step-down conversion of the first voltage;

[0043] The second end of the voltage dividing circuit is connected to the anode of the second diode, and is used for outputting the fourth voltage to the backup power supply;

[0044] The cathode of the second diode is connected to the first end of the backup power supply;

[0045] Correspondingly, the backup power supply includes: a charging capacitor, an eleventh resistor, and a third diode;

[0046] The VIN terminal of the LDO chip is connected to the terminal through the terminal interface, and the VOUT terminal is connected to the first end of the voltage dividing circuit, and is used for converting the first voltage into a fourth voltage, the fourth voltage is less than the first voltage, and the fourth voltage is greater than the third voltage;

[0047] The second end of the voltage dividing circuit is connected to the anode of the second diode;

[0048] The cathode of the second diode is respectively connected to the anode of the charging capacitor, the first end of the eleventh resistor, and the anode of the third diode;

[0049] The cathode of the charging capacitor is connected to the ground, and the capacitance of the charging capacitor is greater than a preset capacitance threshold;

[0050] The second end of the eleventh resistor is connected to the ground;

[0051] The cathode of the third diode is respectively connected to the cathode of the unidirectional conduction module and the first end of the first filtering module.

[0052] Optionally, it further includes:

[0053] A watchdog circuit, the first end of the watchdog circuit is connected to the output end of the first DCDC module, and the second end is connected to the WIFI communication module, and is used to control the reset of the WIFI communication module when the WIFI communication module does not send a watchdog signal within a preset time.

[0054] Optionally, it further includes:

[0055] An LED indication circuit, the first end of the LED indication circuit is connected to the output end of the first DCDC module, and the second end is connected to the WIFI communication module, and is used to perform corresponding lighting according to the power-on situation of the WIFI communication module.

[0056] Optionally, it further includes:

[0057] The WIFI communication module includes: a PCB antenna and an ARM processor based on the WIFI6 protocol, and the ARM processor is respectively connected to the output end of the first DCDC module and the PCB antenna.

[0058] The purpose of the present utility model is to provide a wireless communication module. When the terminal is normally powered on, the first DCDC module in the wireless communication module will step down the first voltage transmitted by the terminal to the second voltage required by the WIFI communication module, and the second DCDC module will step down the first voltage to the fourth voltage required for the operation of the backup power supply. When the terminal stops being powered on, then the first DCDC module will step down the third voltage output by the backup power supply to the second voltage, so that the WIFI communication module remains normally powered on when the terminal is not powered on. In this solution, when the terminal is normally powered on, that is, when the terminal outputs the first voltage, the first DCDC circuit only needs to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module, without the need for secondary voltage conversion, thereby greatly reducing the product power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0060] Figure 1 It is a schematic structural diagram of a wireless communication module provided by the present utility model;

[0061] Figure 2 It is a schematic structural diagram of another wireless communication module provided by the present utility model;

[0062] Figure 3 A structural schematic diagram of a first DCDC module and an LDO chip provided by the present utility model;

[0063] Figure 4 A structural schematic diagram of a level conversion circuit provided by the present utility model;

[0064] Figure 5 A structural schematic diagram of a power-down detection circuit provided by the present utility model;

[0065] Figure 6 A structural schematic diagram of a backup power supply provided by the present utility model;

[0066] Figure 7 A structural schematic diagram of a watchdog circuit provided by the present utility model;

[0067] Figure 8 A structural schematic diagram of an LED circuit provided by the present utility model;

[0068] Figure 9 A structural schematic diagram of a WIFI6 communication module provided by the present utility model. Specific embodiments

[0069] The core of the present utility model is to provide a wireless communication module. In this solution, when the terminal is normally powered on, that is, when the terminal outputs a first voltage, the first DCDC circuit only needs to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module, without the need for secondary voltage conversion, thereby greatly reducing the power consumption of the product.

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0071] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a wireless communication module provided by the present utility model. The wireless communication module includes: a terminal interface 1, a first DCDC module 2, a WIFI communication module 3, a second DCDC module 4, and a backup power supply 5;

[0072] The input terminal of the first DCDC module 2 is connected to the terminal through the terminal interface 1, and is used to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module 3, and step down the third voltage output by the backup power supply 5 to the second voltage when the terminal does not output the first voltage;

[0073] The input terminal of the second DCDC module 4 is connected to the terminal through the terminal interface 1, and the output terminal is connected to the input terminal of the backup power supply 5, and is used to convert the first voltage into the fourth voltage required for the operation of the backup power supply 5;

[0074] The output terminal of the backup power supply 5 is connected to the input terminal of the first DCDC module 2;

[0075] The WIFI communication module 3 is connected to the output terminal of the first DCDC module 2, and the communication port is connected to the terminal, and is used to perform data communication with the terminal when powered on.

[0076] In the present utility model, a terminal interface 1, a first DCDC module 2, a WIFI communication module 3, a second DCDC module 4 and a backup power supply 5 are provided in the wireless communication module. Among them, the function of the terminal interface 1 is to transmit the first voltage transmitted by the terminal to the first DCDC (Direct Current Direct Current) module 2 and the second DCDC module 4 respectively. When the terminal is normally powered on, that is, when the terminal transmits the first voltage, the first DCDC module 2 will step down the first voltage to the second voltage required for the operation of the WIFI communication module 3, so that the WIFI communication module 3 is powered on to work. At the same time, the second DCDC module 4 will step down the first voltage to the fourth voltage required for the operation of the backup power supply 5; on the contrary, when the terminal stops being powered on, that is, when the terminal stops transmitting the first voltage, the backup power supply 5 will transmit the stored third voltage to the first DCDC module 2, and the first DCDC module 2 will step down the third voltage to the second voltage required for the operation of the WIFI communication module 3, so that the WIFI communication module 3 is still powered on when the terminal stops being powered on. Because in this solution, when the terminal is normally powered on, that is, when the terminal outputs the first voltage, the first DCDC circuit only needs to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module 3, and there is no need for secondary voltage conversion, so the product power consumption is greatly reduced.

[0077] It should be noted that as Figure 2 shown, a download and debugging interface is also provided in the wireless communication module, and the function of the download and debugging interface is to transmit the program transmitted by the host computer to the WIFI communication module 3, and the WIFI communication module 3 will generate a corresponding response signal after receiving the program, and then transmit it back to the host computer through the download and debugging interface.

[0078] It should also be noted that in practical applications, the terminal interface 1 can be connected to devices such as terminals, concentrators, and electric meters, and is mainly applicable to electric meters.

[0079] This embodiment provides a wireless communication module. When the terminal is normally powered on, the first DCDC module 2 in the wireless communication module will step down the first voltage transmitted by the terminal to the second voltage required by the WIFI communication module 3, and the second DCDC module 4 will step down the first voltage to the fourth voltage required for the operation of the backup power supply 5. When the terminal stops being powered on, then the first DCDC module 2 will step down the third voltage output by the backup power supply 5 to the second voltage, so that the WIFI communication module 3 remains normally powered on when the terminal is not powered on. In this solution, when the terminal is normally powered on, that is, when the terminal outputs the first voltage, the first DCDC circuit only needs to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module 3, without the need for secondary voltage conversion, thereby greatly reducing the product power consumption.

[0080] Based on the above embodiment:

[0081] As an optional embodiment, please refer to Figure 2 , Figure 2 which is a schematic structural diagram of another wireless communication module provided by the present utility model. The first DCDC module 2 includes: a unidirectional conduction module, a first filtering module, a DCDC chip, and a second filtering module;

[0082] The positive pole of the unidirectional conduction module is connected to the terminal through the terminal interface 1, and the negative pole is respectively connected to the first end of the first filtering module and the second end of the backup power supply 5;

[0083] The second end of the first filtering module is respectively connected to the first end of the current limiting resistor and the voltage input terminal of the DCDC chip;

[0084] The voltage output terminal of the DCDC chip is connected to the second filtering module, and is used to convert the first voltage into the second voltage and convert the third voltage into the second voltage.

[0085] In the present utility model, the first DCDC module 2 is provided with: a one-way conduction module, a first filtering module, a DCDC chip, and a second filtering module. To ensure the problem of reverse current caused by the sudden power-off of the terminal, this solution constitutes two voltage transmission loops through the one-way conduction module. The devices on one voltage transmission loop are, in sequence, the terminal, the terminal interface 1, the one-way conduction module, the first filtering module, and the DCDC chip. Among them, the first voltage transmitted by the terminal is filtered by the first filtering module and then transmitted to the DCDC chip, and the DCDC chip will step down the first voltage to the second voltage required for the operation of the WIFI communication module 3. The devices on the other voltage transmission loop are, in sequence, the backup power supply 5, the first filtering module, and the DCDC chip. The third voltage transmitted by the backup power supply 5 is filtered by the first filtering module and then transmitted to the DCDC chip, and the DCDC chip will step down the third voltage to the second voltage required for the operation of the WIFI communication module 3. Since there is no first voltage transmitted through the one-way conduction module when the terminal suddenly stops powering on, and because the cathode voltage of the one-way conduction module is the third voltage output by the backup power supply 5, at this time, the cathode voltage of the one-way conduction module is greater than the anode voltage, and the one-way conduction module does not conduct. Therefore, this solution can avoid the occurrence of reverse current, and has extremely high reliability and safety.

[0086] It should be noted that in practical applications, the one-way conduction module can be a diode or other one-way conduction devices.

[0087] It should also be noted that in practical applications, when the first voltage is 12V, the second voltage is 3.3V, the third voltage is 5V, and the fourth voltage is 4.2V, in the main power supply circuit (from the first DCDC module 2 to the WIFI communication module 3), 12V is input to the JW5060 (DCDC chip) chip, and by adjusting the size of the feedback resistors connected to each pin of the DCDC chip, a voltage of 3.3V is output directly to supply power to the WIFI communication module 3. At this time, only one-level voltage conversion is performed, and the one-level direct conversion efficiency can be as high as more than 90%, so the product power consumption is greatly reduced. The charging circuit of the backup power supply 5 (the second DCDC module 4) is input with 12V to the SGM2203-5.0YK3G / TR (LDO (Low Dropout Regulator) chip), and the output voltage is reduced to 5.4V to charge the super capacitor. The charging current after the super capacitor is fully charged is several hundred microamperes. The network V_SC is the output port of the backup power supply 5, and the voltage output by the backup power supply 5 and the 12V voltage input output by the terminal form a competitive relationship. When 12V exists, the system is powered by 12V. After 12V fails, the system will automatically switch to the backup power supply 5 for power supply. The one-way conduction module is used to prevent the voltage output by the backup power supply 5 from being inverted into the terminal when 12V fails.

[0088] It should also be noted that in practical applications, such as Figure 3 shown, in the first DCDC module 2, corresponding filter capacitors, filter inductors, current-limiting resistors, charging capacitors, and voltage-regulating diodes are also provided. Their respective functions are to improve the stability of current transmission through filtering, current limiting, and voltage regulation.

[0089] As an alternative embodiment, it further includes:

[0090] A level conversion circuit 6. The first end of the level conversion circuit 6 is connected to the level transmission port of the terminal interface 1, the second end is connected to the level reception port of the terminal interface 1, the third end is connected to the level transmission port of the WIFI communication module 3, and the fourth end is connected to the level reception port of the WIFI communication module 3, and is used to control the level of its first end to be equal to the level of its fourth end, and control the level of its second end to be equal to the level of its third end.

[0091] In the present utility model, a level conversion circuit 6 is also provided in the wireless communication module. The purpose of setting the level conversion circuit 6 is to make the level conditions of the terminal and the WIFI communication module 3 the same, that is, to control the level of the level transmission port of the terminal interface 1 to be equal to the level of the level reception port of the WIFI communication module 3, and control the level of the level reception port of the terminal interface 1 to be equal to the level of the level transmission port of the WIFI communication module 3. When the level conditions of the terminal and the WIFI communication module 3 are the same, the information interaction between the terminal and the WIFI communication module 3 will be more stable, improving the stability and accuracy of the solution.

[0092] As an alternative embodiment, the level conversion circuit 6 includes: a receiving circuit and a transmitting circuit; the receiving circuit includes: a first diode D1, a first resistor R1, a first capacitor C1, and a first bidirectional voltage-regulating diode F1; the transmitting circuit includes: a second bidirectional voltage-regulating diode F2, a second resistor R2, a third resistor R3, a first NPN-type triode Q1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second NPN-type triode Q2, a seventh resistor R7, a second capacitor C2, and a pull-up resistor;

[0093] The cathode of the first diode D1 is connected to the level transmission port of the terminal interface 1, and the anode is respectively connected to the first end of the first resistor R1 and the first end of the first capacitor C1;

[0094] The second end of the first resistor R1 is connected to a preset power supply;

[0095] The second end of the first capacitor C1 is connected to the ground;

[0096] The anode of the first bi-directional voltage regulator F1 is respectively connected to the first end of the first capacitor C1, the anode of the first diode D1, the first end of the first resistor R1, and the level receiving port of the WIFI communication module 3, and the cathode is connected to the ground;

[0097] The anode of the second bi-directional voltage regulator F2 is respectively connected to the level sending port of the WIFI communication module 3 and the first end of the second resistor R2, and the cathode is connected to the ground;

[0098] The second end of the second resistor R2 is respectively connected to the first end of the third resistor R3 and the base of the first NPN transistor Q1;

[0099] The second end of the third resistor R3 is connected to the ground;

[0100] The collector of the first NPN transistor Q1 is connected to the first end of the fourth resistor R4 and the first end of the fifth resistor R5, and the emitter is connected to the ground;

[0101] The second end of the fourth resistor R4 is connected to the power supply;

[0102] The second end of the fifth resistor R5 is respectively connected to the first end of the sixth resistor R6 and the base of the second NPN transistor Q2;

[0103] The second end of the sixth resistor R6 is connected to the ground;

[0104] The emitter of the second NPN transistor Q2 is connected to the ground, and the collector is connected to the first end of the seventh resistor R7;

[0105] The second end of the seventh resistor R7 is respectively connected to the first end of the second capacitor C2, the first end of the pull-up resistor, and the level receiving port of the terminal interface 1;

[0106] The second end of the pull-up resistor is connected to the preset power supply;

[0107] The second end of the second capacitor C2 is connected to the ground.

[0108] In the present utility model, as Figure 4As shown in the figure, the level conversion circuit 6 is provided with a receiving circuit and a transmitting circuit. In the receiving circuit, if the level output from the level transmitting port of the terminal interface 1 is a high level, at this time, the first diode D1 is not conducting. At this time, the preset power supply, the first resistor R1, the first bidirectional voltage regulator F1, and the level receiving port of the WIFI communication module 3 form a loop in sequence. At this time, the level of the level receiving port of the WIFI communication module 3 is pulled to a high level; conversely, when the level output from the level transmitting port of the terminal interface 1 is a low level, at this time, the first diode D1 is conducting. At this time, the level of the level receiving port of the WIFI communication module 3 should be the level output from the level transmitting port of the terminal interface 1 plus the voltage drop when the first diode D1 is conducting. Because the voltage drop when the first diode D1 is conducting is small, the level of the level receiving port of the WIFI communication module 3 is a low level; similarly, in the transmitting circuit, when the level transmitting port of the WIFI communication module 3 is a high level, at this time, the first NPN transistor Q1 is conducting and the second NPN transistor Q2 is cut off. The level of the level receiving port of the terminal interface 1 is pulled up to a high level through the action of the pull-up resistor and the preset power supply; conversely, when the level transmitting port of the WIFI communication module 3 is a low level, at this time, the first NPN transistor Q1 is cut off and the second NPN transistor Q2 is conducting. The level of the level receiving port of the terminal interface 1 is pulled to the ground through the conducting second NPN transistor Q2. Therefore, the level of the level receiving port of the terminal interface 1 is a low level at this time; this solution ensures that the level conditions of the terminal and the WIFI communication module 3 are the same through the receiving circuit and the transmitting circuit, thereby making the information interaction between the terminal and the WIFI communication module 3 more stable and improving the stability and accuracy of the solution.

[0109] It should be noted that in practical applications, the level conversion circuit 6 is applicable to systems with VIL (minimum input voltage) ≤ 200 mV and a serial port rate lower than 1 MHz. The first capacitor C1 can be selected as a ceramic capacitor because the ceramic capacitor can filter out high-order harmonics. The first resistor R1 is a current-limiting resistor, which can enhance the anti-interference ability of the circuit. In addition, a 0 Ω resistor can be reserved in parallel at both ends of the first diode D1. If the serial port of the terminal is an open-drain output, the 0 Ω resistor can be soldered and the first diode D1 is not soldered.

[0110] It should also be noted that in practical applications, as Figure 4 shown, multiple current-limiting resistors and filter currents can also be set in the level conversion circuit 6 according to actual needs to further improve the safety and stability of current transmission.

[0111] It should also be noted that in addition to the receiving circuit and the transmitting circuit, a reset circuit is also provided in the level conversion circuit 6. The function of the reset circuit is that in actual work, if the terminal finds that there is a problem with the data transmitted by the WIFI communication module 3 or finds that the WIFI communication module 3 is not working properly when interacting with the WIFI communication module 3, the function of the reset circuit at this time is to set the enable terminal of the DCDC chip low, so that the DCDC chip does not output a voltage of 3.3V, thereby stopping the operation of the WIFI communication module 3. The structure of the reset circuit is as Figure 8 shown. Among them, the reset circuit includes a reset resistor and a reset diode. The cathode of the reset diode is connected to the level reset port of the terminal, and the anode of the reset diode is connected to the EN terminal (enable terminal) of the DCDC chip through a resistor. When the WIFI communication module 3 is working properly, the EN terminal of the DCDC chip is always at a high level; on the contrary, if the terminal detects a fault in the WIFI communication module 3, the level of the level reset port of the terminal becomes low, and the EN terminal of the DCDC chip is pulled to a low level, and the DCDC chip stops working, thereby stopping the operation of the WIFI communication module 3.

[0112] As an optional embodiment, it further includes:

[0113] A power-off detection circuit 7. The first end of the power-off detection circuit 7 is connected to the terminal through the terminal interface 1, the second end is connected to the WIFI communication module 3, and the power supply end is connected to the output end of the first DCDC module 2, and is used to output a first signal to the WIFI communication module 3 when receiving the first voltage; and output a second signal to the WIFI communication module 3 when not receiving the first voltage.

[0114] In the present invention, a power-off detection circuit 7 is also provided in the wireless communication module. As long as the output end of the first DCDC module 2 can output a second voltage, the power-off detection circuit 7 can work normally, that is, when the terminal is normally powered on or the terminal is not powered on and the backup power supply 5 outputs a third voltage to the first DCDC module 2, the power-off detection circuit 7 can ensure normal operation and detect the power-on situation of the terminal. For example: when the terminal is powered on, the power-off detection circuit 7 will output a first signal to the WIFI communication module 3 when receiving the first voltage to notify the WIFI module that the current terminal is not powered off and make the WIFI module continue to work normally; on the contrary, if the terminal is not powered on, the power-off detection circuit 7 will output a second signal to the WIFI communication module 3 to notify the WIFI module that the current terminal is powered off, so that the WIFI module performs corresponding operations. The power-off detection circuit 7 can ensure real-time monitoring of the power-on situation of the terminal, which is convenient for the WIFI module to perform timely operations according to the power-on situation of the terminal.

[0115] As an alternative embodiment, the power-down detection circuit 7 includes: an eighth resistor R8, a third NPN transistor Q3, a ninth resistor R9, a fourth NPN transistor Q4, a tenth resistor R10, and a first RC filtering module;

[0116] The first end of the eighth resistor R8 is connected to the terminal through the terminal interface 1, and the second end is connected to the base of the third NPN transistor Q3;

[0117] The collector of the third NPN transistor Q3 is respectively connected to the first end of the ninth resistor R9 and the base of the fourth NPN transistor Q4, and the emitter is connected to the ground;

[0118] The second end of the ninth resistor R9 is connected to the output end of the first DCDC module 2;

[0119] The collector of the fourth NPN transistor Q4 is respectively connected to the first end of the first RC filtering module and the first end of the tenth resistor R10, and the emitter is connected to the ground;

[0120] The second end of the tenth resistor R10 is connected to the output end of the first DCDC module 2;

[0121] The second end of the first RC filtering module is connected to the WIFI communication module 3.

[0122] In the present utility model, the power-down detection circuit 7 is provided with: an eighth resistor R8, a third NPN transistor Q3, a ninth resistor R9, a fourth NPN transistor Q4, a tenth resistor R10, and a first RC filtering module. Among them, the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 play a current-limiting role. When the first end of the eighth resistor R8 is connected to a first voltage, the third NPN transistor Q3 conducts, and the fourth NPN transistor Q4 cuts off. At this time, the voltage at the collector of the fourth NPN transistor Q4, that is, the level of the signal output to the WIFI communication module 3, is pulled up to a high level through the action of the tenth resistor R10 and the output end of the first DCDC module 2; conversely, if the first end of the eighth resistor R8 is not connected to the first voltage or the connected voltage is less than the preset voltage, the third NPN transistor Q3 cuts off, and the fourth NPN transistor Q4 conducts. At this time, the voltage at the collector of the fourth NPN transistor Q4, that is, the level of the signal output to the WIFI communication module 3, is connected to the ground through the conducting fourth NPN transistor Q4. At this time, the level output to the WIFI communication module 3 is pulled to a low level. The power-down detection circuit 7 can accurately detect the power-on situation of the terminal, which is convenient for practical applications.

[0123] It should be noted that when the terminal is normally powered, the third NPN transistor Q3 is turned on and the fourth NPN transistor Q4 is turned off. At this time, the level of the signal output to the WIFI communication module 3 is high. Conversely, when the terminal stops powering on or the input voltage is lower than the preset voltage threshold, the third NPN transistor Q3 is turned off and the fourth NPN transistor Q4 is turned on. At this time, the level of the signal output to the WIFI communication module 3 becomes low. In addition, as Figure 5 shown, in practical applications, two voltage dividing resistors and a filtering capacitor can also be set at the front end of the eighth resistor R8 in the power-down detection circuit 7. Moreover, by adjusting the resistance values of these two voltage dividing resistors, different power-down detection threshold voltages can be set. The resistance values of these two voltage dividing resistors should be appropriately selected to be larger to ensure that the third NPN transistor Q3 operates in the saturation region. If the value is too small, the input electrical energy will be wasted, increasing the product power consumption.

[0124] As an optional embodiment, the second DCDC module 4 includes: an LDO chip, a voltage dividing circuit, and a second diode D2;

[0125] The VIN terminal of the LDO chip is connected to the terminal through the terminal interface 1, and the VOUT terminal is connected to the first end of the voltage dividing circuit, for step-down conversion of the first voltage;

[0126] The second end of the voltage dividing circuit is connected to the anode of the second diode D2, for outputting a fourth voltage to the backup power supply 5;

[0127] The cathode of the second diode D2 is connected to the first end of the backup power supply 5;

[0128] Correspondingly, the backup power supply 5 includes: a charging capacitor, an eleventh resistor R11, and a third diode D3;

[0129] The VIN terminal of the LDO chip is connected to the terminal through the terminal interface 1, and the VOUT terminal is connected to the first end of the voltage dividing circuit, for converting the first voltage into a fourth voltage. The fourth voltage is less than the first voltage and greater than the third voltage;

[0130] The second end of the voltage dividing circuit is connected to the anode of the second diode D2;

[0131] The cathode of the second diode D2 is respectively connected to the anode of the charging capacitor, the first end of the eleventh resistor R11, and the anode of the third diode D3;

[0132] The cathode of the charging capacitor is connected to the ground, and the capacitance of the charging capacitor is greater than the preset capacitance threshold;

[0133] The second end of the eleventh resistor R11 is connected to the ground;

[0134] The cathode of the third diode D3 is respectively connected to the cathode of the unidirectional conduction module and the first end of the first filtering module.

[0135] In the present utility model, an LDO chip, a voltage dividing circuit, and a second diode D2 are provided in the second DCDC module 4. As Figure 3 shown, among them, the LDO chip can step down and convert the first voltage, and the voltage output by the LDO chip is divided by the voltage dividing circuit and then outputs the fourth voltage required for the operation of the standby power supply 5. The second diode D2 ensures that when the terminal suddenly stops powering on, the electric energy transmitted by the standby power supply 5 is prevented from flowing back in reverse to the terminal interface 1. And in the standby power supply 5, there are provided: a charging capacitor, an eleventh resistor R11, and a third diode D3. As Figure 6 shown, among them, the eleventh resistor R11 plays a role in current limiting. The charging capacitor will be charged after receiving the fourth voltage transmitted by the voltage dividing circuit, and when the terminal stops powering on, it will transmit the fourth voltage to the cathode of the unidirectional conduction module and the first end of the first filtering module through the third diode D3. The purpose of setting the third diode D3 is also to avoid the occurrence of reverse current, improving the reliability of the solution.

[0136] It should be noted that when the wireless communication module is powered on, the 5.4V voltage output by the LDO chip charges the charging capacitor through the voltage dividing circuit (constituted by three resistors). When the terminal stops powering on, the charging capacitor supplies power to the input end of the main power supply circuit through the third diode D3. Since a competitive power supply scheme is adopted and the unidirectional conduction module plays a role in preventing backflow, the safety of the module can be guaranteed. In addition, the eleventh resistor R11 acts as a small load to prevent the charging capacitor from overcharging due to the leakage current of the third diode D3, but the value of the eleventh resistor R11 should not be too small, otherwise it will increase the power consumption of the system.

[0137] It should also be noted that as Figure 3 shown, in practical applications, additional resistors or capacitors can be connected to both the input end and the output end of the LDO chip for corresponding current limiting or filtering, thereby improving the stability of power transmission.

[0138] As an optional embodiment, it further includes:

[0139] A watchdog circuit 8, the first end of the watchdog circuit 8 is connected to the output end of the first DCDC module 2, and the second end is connected to the WIFI communication module 3, and is used to control the reset of the WIFI communication module 3 when the WIFI communication module 3 does not send a watchdog signal within a preset time period.

[0140] In the present utility model, a watchdog circuit 8 is further provided in the wireless communication module. The function of the watchdog circuit 8 is to monitor the working state of the WIFI communication module 3 by collecting the dog feeding signal. If the watchdog circuit 8 receives the dog feeding signal sent by the WIFI communication module 3 within a preset time period, it proves that the WIFI communication module 3 is working properly or the program is running normally at this time, and there is no need to control the WIFI communication module 3 to reset; on the contrary, if the watchdog circuit 8 does not receive the dog feeding signal sent by the WIFI communication module 3 within the preset time period, it proves that the WIFI communication module 3 is not working properly or the program is running abnormally at this time, and it is necessary to control the WIFI communication module 3 to reset. This solution monitors the operation of the WIFI communication module 3 by adding a watchdog circuit 8, which is convenient for timely discovering the faults of the WIFI communication module 3 and quickly performing corresponding maintenance, and also avoids the impact on the entire wireless communication module caused by the faults of the WIFI communication module 3, improving the safety and reliability of the solution.

[0141] It should be noted that in practical applications, as Figure 7 shown, the watchdog circuit 8 generally consists of a watchdog chip, corresponding resistors, capacitors, and a conduction module composed of two NPN-type triodes. Among them, the watchdog chip uses SGM821B. The resistance of the 3-pin of the watchdog chip to the ground is used to set the maximum dog feeding time. If the resistance value of the resistance to the ground = 49.9Kohm, the dog feeding time is about 315 seconds. The 4-pin of the watchdog chip is the dog feeding pin. When there is no dog feeding for more than 315 seconds, the 6-pin of the watchdog chip will output a low level of 320ms. At this time, the fifth NPN-type triode Q5 on the left is cut off, and the sixth NPN-type triode Q6 on the right is turned on. The signal output from the collector of the sixth NPN-type triode Q6 to the WIFI communication module 3 is a low level signal, thereby resetting the WIFI communication module 3. When the wireless communication module needs to burn the firmware, at this time, the short-circuit device connected to the base of the fifth NPN-type triode Q5 will output a 3.3V voltage, that is, the voltage of the base of the fifth NPN-type triode Q5 is short-circuited to 3.3V. At this time, regardless of whether the 6-pin of the watchdog chip is high level or low level, the fifth NPN-type triode Q5 will be turned on, and the sixth NPN-type triode Q6 will be cut off. NRST is high level, and the signal output from the collector of the sixth NPN-type triode Q6 to the WIFI communication module 3 is a high level signal, and the WIFI communication module 3 will not be reset.

[0142] As an optional embodiment, it further includes:

[0143] An LED circuit 9, the first end of the LED circuit 9 is connected to the output end of the first DCDC module 2, and the second end is connected to the WIFI communication module 3, and is used to be correspondingly lit according to the power-on situation of the WIFI communication module 3.

[0144] In the present utility model, an LED (Light-Emitting Diode) circuit 9 is further provided in the wireless communication module, and the function of the LED circuit 9 is to be correspondingly lit according to the power-on situation of the WIFI communication module 3. The purpose of setting the LED circuit 9 in this solution is to enable the user to clearly observe the power-on situation of the WIFI communication module 3. If the LED circuit 9 shows that the WIFI communication module 3 is not powered on, but the terminal is powered on at this time, it proves that there is a fault in the circuit of the wireless communication module or one of the electronic components therein, which is convenient for the user to timely discover the fault situation of the wireless communication module and perform subsequent maintenance work faster, facilitating practical application and also improving the safety of the solution.

[0145] It should be noted that in practical applications, as Figure 8 shown, multiple LED indication sub-circuits can be provided in the LED circuit 9. For example: the base of the seventh NPN-type triode Q7 on the upper side is connected to the normal power-on reminder terminal of the WIFI module. When the WIFI module is normally powered on, the normal power-on reminder terminal of the WIFI module outputs a high level at this time, and the seventh NPN-type triode Q7 conducts, and the first light-emitting diode connected to the collector of the seventh NPN-type triode Q7 can emit green light to indicate that the WIFI module is normally powered on at this time; similarly, the base of the eighth NPN-type triode Q8 on the lower side is connected to the abnormal power-on reminder terminal of the WIFI module. When the WIFI module is abnormally powered on, the abnormal power-on reminder terminal of the WIFI module outputs a high level at this time, and the eighth NPN-type triode Q8 conducts, and the second light-emitting diode connected to the collector of the eighth NPN-type triode Q8 can emit red light to indicate that the WIFI module is abnormally powered on at this time. In addition, multiple LED branches can be set according to actual needs to remind various working modes of the WIFI module, etc., which is convenient for the user to directly view. The multiple resistors provided in the LED circuit 9 all play a role in current limiting, and in order to reduce the power consumption of the product, the resistance values of the multiple resistors can be increased.

[0146] As an optional embodiment, it further includes:

[0147] The WIFI communication module 3 includes: a PCB antenna and an ARM processor based on the WIFI6 protocol. The ARM processor is respectively connected to the output terminal of the first DCDC module 2 and the PCB antenna.

[0148] In the present utility model, as Figure 9As shown, the WIFI communication module 3 is a WIFI6 communication module. Since the WIFI6 protocol has higher computing power and better security, only a PCB (Printed Circuit Board) antenna and an ARM (Advanced RISC Machines, RISC microprocessor) processor based on the WIFI6 protocol are provided in the communication module using the WIFI6 protocol, and there is no need to set up an MCU (Microcontroller Unit), which reduces the hardware cost and processing cost, and improves the cost performance and competitiveness of the product.

[0149] It should be noted that the WIFI6 communication module uses FCM360WAAMD-0P-04, whose processor main frequency is up to 240 MHz, supports the IEEE 802.11b / g / n / ax protocol, has 512 KB SRAM (Static Random-Access Memory) and 4 MB / 8 MB Flash built-in, and complies with the WPA-PSK (Wi-Fi Protected Access-Preshared Key), WPA2-PSK (Wi-Fi Protected Access2-Preshared Key) and WPA3-SAE (Wi-Fi Protected Access3-Simultaneous Authentication of Equals) security protocol standards, and supports the AES (Advanced Encryption Standard) 128-bit hardware encryption algorithm. It supports a variety of low-power modes and long-connection keep-alive mechanisms, making it flexible and widely applicable to application scenarios such as smart home and industrial Internet of Things, meeting different scenario requirements. In addition, FCM360WAAMD-0P-04 has a built-in PCB antenna, saving the MCU chip and reducing the processing cost. The description of the allocation of the module IO (Input / Output) pin resources used in this utility model is shown in Table 1 below:

[0150] Table 1

[0151] Item Description Indicator Light GPIO21, GPIO22 Active High Communication Serial Port UART2_TX, UART2_RX Download and Debug Information Output Port RXD0, TXD0 Watchdog Feed Pin GPIO23 Power-down Detection Pin GPIO24 Active Low Watchdog Reset Output RESET_N Active Low

[0152] It should also be noted that this application has the following advantages:

[0153] 1. The wireless module solution using SOC (System on Chip) integrates a PCB antenna, only an ARM processor needs to be built-in, saving the MCU chip, effectively reducing the hardware cost and processing cost, and improving the cost performance and competitiveness of the product;

[0154] 2. The first DCDC module 2 directly converts the 12V input voltage into the working voltage of 3.3V for the WIFI communication module 3, greatly improving the power conversion efficiency compared with the conventional two-stage conversion scheme and reducing the power consumption of the wireless communication module. In addition, the power-off detection circuit 7 and the LED circuit 9 set in the wireless communication circuit optimize some resistance parameters, further reducing the module power consumption.

[0155] 3. The WIFI communication module adopts WIFI6 technology. Because the WIFI6 technology adds the TWT (Target Wake Time) technology compared with the currently adopted WIFI4 technology and WIFI5 technology, which is an important resource scheduling function. It allows devices to negotiate when and how long to wake up to send or receive data. The wireless access point can group client devices into different TWT cycles, thus reducing the number of devices competing for the wireless medium simultaneously after waking up. TWT also increases the device sleep time, thus greatly reducing the product power consumption. It is expected that the power consumption can be reduced by more than 30% compared with the wireless communication module using the WIFI4 protocol.

[0156] 4. The WIFI6 technology can use WPA3 encryption. WPA3 is an improvement and optimization based on WPA2, adopting a more stringent encryption algorithm, reducing the possibility of middle device attacks, and optimizing the wireless signal at the same time, improving the signal strength and security. In addition, it can also be backward compatible with the WEP (Wired Equivalent Privacy), WPA and WPA2 encryptions of WIFI4, and can well replace the products of the corresponding WIFI4 technology.

[0157] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0158] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wireless communication module, characterized in that, Comprising: A terminal interface, a first DCDC module, a WIFI communication module, a second DCDC module, and a backup power supply; The input end of the first DCDC module is connected to the terminal through the terminal interface, and is used to step down the first voltage output by the terminal to the second voltage required for the operation of the WIFI communication module, and step down the third voltage output by the backup power supply to the second voltage when the terminal does not output the first voltage; The input end of the second DCDC module is connected to the terminal through the terminal interface, and the output end is connected to the input end of the backup power supply, and is used to convert the first voltage into the fourth voltage required for the operation of the backup power supply; The output end of the backup power supply is connected to the input end of the first DCDC module; The WIFI communication module is connected to the output end of the first DCDC module, and the communication port is connected to the terminal, and is used to perform data communication with the terminal when powered on.

2. The wireless communication module according to claim 1, characterized in that, The first DCDC module includes: a one-way conduction module, a first filtering module, a DCDC chip, and a second filtering module; The positive electrode of the one-way conduction module is connected to the terminal through the terminal interface, and the negative electrode is respectively connected to the first end of the first filtering module and the second end of the backup power supply; The second end of the first filtering module is connected to the voltage input end of the DCDC chip; The voltage output end of the DCDC chip is connected to the second filtering module, and is used to convert the first voltage into the second voltage and convert the third voltage into the second voltage.

3. The wireless communication module according to claim 1, characterized in that, It further includes: A level conversion circuit, the first end of the level conversion circuit is connected to the level sending port of the terminal interface, the second end is connected to the level receiving port of the terminal interface, the third end is connected to the level sending port of the WIFI communication module, and the fourth end is connected to the level receiving port of the WIFI communication module, and is used to control the level of its first end to be equal to the level of its fourth end, and control the level of its second end to be equal to the level of its third end.

4. The wireless communication module according to claim 3, wherein, The level conversion circuit includes: a receiving circuit and a sending circuit; the receiving circuit includes: a first diode, a first resistor, a first capacitor, and a first bidirectional voltage regulator; the sending circuit includes: a second bidirectional voltage regulator, a second resistor, a third resistor, a first NPN transistor, a fourth resistor, a fifth resistor, a sixth resistor, a second NPN transistor, a seventh resistor, a second capacitor, and a pull-up resistor; The cathode of the first diode is connected to the level sending port of the terminal interface, and the anode is respectively connected to the first end of the first resistor and the first end of the first capacitor; The second end of the first resistor is connected to a preset power supply; The second end of the first capacitor is connected to the ground; The anode of the first bidirectional voltage regulator is respectively connected to the first end of the first capacitor, the anode of the first diode, the first end of the first resistor, and the level receiving port of the WIFI communication module, and the cathode is connected to the ground; The anode of the second bidirectional voltage regulator tube is respectively connected to the level sending port of the WIFI communication module and the first end of the second resistor, and the cathode is connected to the ground; The second end of the second resistor is respectively connected to the first end of the third resistor and the base of the first NPN transistor; The second end of the third resistor is connected to the ground; The collector of the first NPN transistor is connected to the first end of the fourth resistor and the first end of the fifth resistor, and the emitter is connected to the ground; The second end of the fourth resistor is connected to the power supply; The second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the base of the second NPN transistor; The second end of the sixth resistor is connected to the ground; The emitter of the second NPN transistor is connected to the ground, and the collector is connected to the first end of the seventh resistor; The second end of the seventh resistor is respectively connected to the first end of the second capacitor, the first end of the pull-up resistor, and the level receiving port of the terminal interface; The second end of the pull-up resistor is connected to the preset power supply; The second end of the second capacitor is connected to the ground.

5. The wireless communication module according to claim 1, characterized in that, It further includes: A power-down detection circuit, the first end of the power-down detection circuit is connected to the terminal through the terminal interface, the second end is connected to the WIFI communication module, and the power supply end is connected to the output end of the first DCDC module, and is used to output a first signal to the WIFI communication module when receiving the first voltage; Output a second signal to the WIFI communication module when the first voltage is not received.

6. The wireless communication module according to claim 5, wherein, The power-down detection circuit includes: an eighth resistor, a third NPN transistor, a ninth resistor, a fourth NPN transistor, a tenth resistor, and a first RC filter module; The first end of the eighth resistor is connected to the terminal through the terminal interface, and the second end is connected to the base of the third NPN transistor; The collector of the third NPN transistor is respectively connected to the first end of the ninth resistor and the base of the fourth NPN transistor, and the emitter is connected to the ground; The second end of the ninth resistor is connected to the output end of the first DCDC module; The collector of the fourth NPN transistor is respectively connected to the first end of the first RC filter module and the first end of the tenth resistor, and the emitter is connected to the ground; The second end of the tenth resistor is connected to the output end of the first DCDC module; The second end of the first RC filter module is connected to the WIFI communication module.

7. The wireless communication module according to claim 2, wherein, The second DCDC module includes: an LDO chip, a voltage dividing circuit, and a second diode; The VIN terminal of the LDO chip is connected to the terminal through the terminal interface, and the VOUT terminal is connected to the first end of the voltage dividing circuit, and is used to perform a step-down conversion on the first voltage; The second end of the voltage dividing circuit is connected to the anode of the second diode, and is used to output the fourth voltage to the backup power supply; The cathode of the second diode is connected to the first end of the backup power supply; Correspondingly, the backup power supply includes: a charging capacitor, an eleventh resistor, and a third diode; The VIN terminal of the LDO chip is connected to the terminal through the terminal interface, and the VOUT terminal is connected to the first end of the voltage dividing circuit, which is used to convert the first voltage into a fourth voltage, where the fourth voltage is less than the first voltage and greater than the third voltage; The second end of the voltage dividing circuit is connected to the anode of the second diode; The cathode of the second diode is respectively connected to the anode of the charging capacitor, the first end of the eleventh resistor, and the anode of the third diode; The cathode of the charging capacitor is connected to the ground, and the capacitance of the charging capacitor is greater than a preset capacitance threshold; The second end of the eleventh resistor is connected to the ground; The cathode of the third diode is respectively connected to the cathode of the unidirectional conduction module and the first end of the first filtering module.

8. The wireless communication module according to claim 1, characterized in that, It further includes: A watchdog circuit, the first end of the watchdog circuit is connected to the output end of the first DCDC module, and the second end is connected to the WIFI communication module, which is used to control the reset of the WIFI communication module when the WIFI communication module does not send a watchdog signal within a preset duration.

9. The wireless communication module according to claim 1, wherein It further includes: An LED indication circuit, the first end of the LED indication circuit is connected to the output end of the first DCDC module, and the second end is connected to the WIFI communication module, which is used to perform corresponding lighting according to the power-on situation of the WIFI communication module.

10. The wireless communication module according to any one of claims 1 to 9, characterized in that, It further includes: The WIFI communication module includes a PCB antenna and an ARM processor based on the WIFI6 protocol, and the ARM processor is respectively connected to the output end of the first DCDC module and the PCB antenna.

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