Wireless power utilization node based on ESP-NOW protocol

Abstract

The utility model relates to a wireless power utilization node based on an ESP-NOW protocol. The wireless power utilization node comprises a voice instruction sending end used for identifying a voice instruction and converting the voice instruction into a control instruction, a receiving control end used for receiving the control instruction, and the ESP-NOW protocol based on which the control instruction is sent to the receiving control end in a one-way manner. According to the utility model, the ESP-NOW protocol is adopted, WIFI connection is not needed for online control, the transmission speed is fast, the delay is low, the system is suitable for application scenarios with high real-time requirements, and the system has the advantages of low power consumption, long service life, simple and easy use, simple structure and low cost. According to the utility model, the ESP-NOW protocol is adopted to support the transmission of various data types, and the power-on and power-off behaviors of the power utilization node can be controlled through a user-defined data structure.

Description

Technical Field

[0001] The utility model relates to the technical field of smart home and voice control system, and in particular to a wireless power node based on ESP-NOW protocol. Background Art

[0002] With the continuous development of smart homes, the linkage control of power nodes is becoming more and more popular. At present, the common linkage system is to transmit control signals online through mobile phone Bluetooth or voice assistants, and then control the power on and off actions of power nodes by connecting to WIFI. However, when the network is not smooth, the delay of the WIFI signal received by the online power node is very serious, and it may even be impossible to control the normal operation of the power node. Summary of the invention

[0003] The utility model proposes a wireless power node based on the ESP-NOW protocol. The ESP-NOW protocol is adopted, and there is no need to connect to WIFI for online control. The transmission speed is very fast and the delay is very low. It is suitable for application scenarios with high real-time requirements. In addition, it has the advantages of low power consumption, long service life, simplicity and ease of use, simple structure and low cost. The utility model adopts the ESP-NOW protocol to support the transmission of multiple data types, and the power-on and power-off actions of the power node can be realized through a custom data structure.

[0004] The utility model discloses a wireless power node based on the ESP-NOW protocol, the wireless power node comprising: a voice instruction sending end for identifying voice instructions and converting the voice instructions into control instructions, a receiving control end for receiving the control instructions, and an ESP-NOW protocol based on which the control instructions are unidirectionally sent to the receiving control end;

[0005] The voice command sending end and the receiving control end both include: a main control circuit, a start-up circuit, an LED signal indication circuit, a reset circuit for realizing a main control reset, and a serial port circuit for realizing a data transmission function;

[0006] The receiving control end also includes a driving circuit and a relay, and a second step-down circuit for stepping down the voltage of an external AC power supply; the second step-down circuit is connected in series with a resistor R5 to the EN pin of the main control chip ESP8266, and the input end of the driving circuit is connected to a working pin of the main control chip ESP8266; the output end of the driving circuit is connected to the input end of the relay, and the output end of the relay is connected to the switch of the power node;

[0007] The main control circuit comprises a main control chip ESP8266, and the reset circuit, serial port circuit, LED signal indication circuit and start-up circuit are respectively connected to the main control chip ESP8266.

[0008] In the utility model, the voice command sending end can recognize the voice command and convert the recognized voice command into a control command, and then based on the ESP-NOW protocol, send the control command unidirectionally to the receiving control end. The receiving control end can control the relay circuit at the power node to generate an action after receiving the control signal, so as to realize the power on and off action of the power node.

[0009] In the utility model, the main control circuit transmits high and low level signals Relay1, and controls the on and off of the transistor by inputting Relay1, thereby controlling the action of the driving circuit. The relay circuit includes a solid-state relay. When Relay1 is a high level signal, the relay is energized, the live wire and the neutral wire of the power node form a path, and the power node works; when Relay1 is a low level signal, the relay is separated, the live wire and the neutral wire of the power node form a circuit break, and the power node is disconnected. The receiving control end receives the control instruction from the voice sending end, and controls Relay1 to output high and low levels according to the control instruction, thereby controlling the separation and attraction of the solid-state relay, so as to control the conduction and shutdown of the power node circuit.

[0010] Furthermore, in the wireless power node of the utility model, the voice command sending end also includes: a voice recognition module, a USB to serial port circuit for realizing firmware downloading and data communication, and a first step-down circuit for reducing the external DC power supply voltage introduced by the USB to serial port circuit to 3.2V~3.4V; the output end of the voice recognition module is connected to the serial port circuit, one end of the USB to serial port circuit is connected to the serial port circuit, the other end of the USB to serial port circuit is connected to the input end of the first step-down circuit, and the output end of the first step-down circuit is connected to the main control chip ESP8266.

[0011] Furthermore, in the wireless power node of the utility model, the reset circuit includes a capacitor C5, one end of the capacitor C5 is connected to the reset pin RST of the main control chip ESP8266, the other end of the capacitor C5 is grounded, and the two ends of the capacitor C5 are also connected in parallel with a short-circuit switch S1 for controlling the charging and discharging of the capacitor C5.

[0012] In the utility model, a short-circuit switch S1 is connected in parallel at both ends of the capacitor C5 to control the charging and discharging of the capacitor C5, thereby realizing the resetting of the main control circuit.

[0013] Furthermore, in the wireless power node of the utility model, the serial port circuit includes a resistor R6 and a resistor R7, and the resistor R6 and the resistor R7 are connected to the serial port pin of the main control chip ESP8266;

[0014] The LED signal indication circuit is connected to the working pin of the main control chip ESP8266 through the resistor R12.

[0015] In the utility model, when the main control chip ESP8266 is in working state, the LED light is always on. When the main control chip ESP8266 receives a signal, the LED light starts to flash.

[0016] Furthermore, in the wireless power node of the utility model, the startup circuit includes a resistor R8, a resistor R9, a resistor R10 and a button S2, one end of the resistor R8, the resistor R9 and the resistor R10 are connected to the corresponding working pins of the main control chip ESP8266, the other end of the resistor R8 and the resistor R9 are connected to the DC power supply A1, the button S2 is connected in series with the resistor R8 and the resistor R10 is directly grounded.

[0017] In the utility model, the working state of the starting circuit is switched by controlling the button S2.

[0018] Furthermore, in the wireless power node of the utility model, in the receiving control end, the driving circuit includes a transistor, the base of the transistor Q1 is connected to resistor R3, and the base and emitter of the transistor are connected to resistor R4; a resistor R2 is connected in parallel at both ends of the relay, and the relay is connected in series with the collector of the transistor.

[0019] Furthermore, in the wireless power node of the utility model, in the receiving control end, the second step-down circuit includes capacitor C1, capacitor C2, capacitor C3, capacitor C4, current limiting resistor R1, isolated voltage-stabilized power supply U1, and step-down chip U2; the external AC power supply is connected in series with the isolated voltage-stabilized power supply U1 and the Vin pin of the step-down chip U2 in sequence, the capacitor C1 and capacitor C2 are connected in parallel between the Vin pin of the step-down chip U2 and the ground, the capacitor C3 and capacitor C4 are connected in parallel between the VOUT pin of the step-down chip U2 and the ground, and the current limiting resistor R1 is connected in series between the VOUT pin of the step-down chip U2 and the output end H1.

[0020] In the present invention, in some examples, in the second step-down circuit, the external AC power supply voltage is 220V, the external AC power supply voltage is reduced to a DC power supply voltage of 5V through the isolation voltage regulator U1, and then reduced to a DC power supply voltage of 3.3V through the step-down chip U2, and then the working voltage is used as the input voltage to drive the above-mentioned other circuits to work. R1 is used as an output resistor.

[0021] Further, in the wireless power node of the utility model, in the voice command sending end, the first step-down circuit includes a step-down chip U3, an input filter capacitor C1, an input filter capacitor C2, an output filter capacitor C3, an output filter capacitor C4, a Schottky diode D1 and a resistor R4; wherein the external DC power supply is connected to the Vin pin of the step-down chip U3 through the Schottky diode D1 in series, and the input filter capacitor C1 and the input filter capacitor C2 are connected in parallel to the Vin pin of the step-down chip U3 and the ground; the output filter capacitor C3 and the output filter capacitor C4 are connected in parallel to the VOUT pin of the step-down chip U3 and the ground; the VOUT pin of the step-down chip U3 and the resistor R4 are connected in series to the output terminal H6.

[0022] Furthermore, in the wireless power node of the utility model, in the voice command sending end, the USB to serial port circuit is composed of a PC end, a USB TYPE-C interface and a chip CH340X, the PC end, the chip CH340X and the first step-down circuit are all connected to the USB TYPE-C interface, and the chip CH340X is connected to the serial port circuit.

[0023] Furthermore, in the wireless power node of the utility model, in the voice command sending end, the voice recognition module is a voice recognition module SU-03T, and the voice recognition module includes: a voice command sending end that recognizes voice commands, and the voice recognition module is a voice recognition module that converts the recognized voice commands into control commands.

[0024] In the utility model, the speech recognition module SU-03T is a low-cost, low-power, small-volume offline speech recognition module, which supports custom wake-up words and sentences, and can receive and recognize non-specific person voices. Through the module, the voice command sending end can recognize the voice command, and convert the recognized voice command into a control command, and then send the control command unidirectionally to the receiving control end based on the ESP-NOW protocol.

[0025] The beneficial effects of the utility model are as follows:

[0026] The utility model is a wireless power node based on the ESP-NOW protocol. The ESP-NOW protocol is used to realize wireless control of the power node. It does not need to be controlled online by connecting to WIFI. Therefore, it has a very fast transmission speed and a very low delay, which is suitable for application scenarios with high real-time requirements. At the same time, the power consumption used by the ESP-NOW protocol during data transmission is very low, which is suitable for battery-powered scenarios and has a long service life; and the ESP-NOW protocol is simple to configure, and only basic parameters such as channels, encryption keys and data structures need to be defined to realize wireless communication. The design structure of the unlimited power node of the utility model is concise and clear, with a simple structure and low cost. The utility model adopts the ESP-NOW protocol to support the transmission of multiple data types, and the power-on and power-off behaviors of the power node can be controlled by customizing the data structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of signal transmission between the voice command sending end and the receiving control end of the utility model;

[0028] Figure 2 This is a circuit connection diagram of the voice command sending end of the utility model;

[0029] Figure 3 This is a circuit connection diagram of the receiving control end of the utility model;

[0030] Figure 4 It is a circuit principle diagram of the main control circuit of a specific implementation method in the utility model;

[0031] Figure 5 It is a circuit principle diagram of a reset circuit in a specific implementation mode of the utility model;

[0032] Figure 6 It is a circuit principle diagram of a serial port circuit in a specific implementation mode of the utility model;

[0033] Figure 7 It is a circuit principle diagram of the LED signal indication circuit of the specific implementation mode in the utility model;

[0034] Figure 8 It is a circuit schematic diagram of a starting circuit in a specific implementation mode of the utility model;

[0035] Fig. 9 It is a schematic diagram of a driving circuit and a relay circuit of a specific implementation method of the utility model;

[0036] Fig.10 It is a circuit principle diagram of a second step-down circuit in a specific implementation mode of the utility model;

[0037] Fig.11It is a circuit principle diagram of a first step-down circuit in a specific implementation mode of the utility model;

[0038] Fig.12 The schematic diagram of the USB to serial port circuit is a specific implementation method of the utility model. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the specific implementation of the utility model clearer, the technical scheme of the specific implementation of the utility model will be described clearly and completely below. If no specific conditions are specified in the specific implementation, the conventional conditions or the conditions recommended by the manufacturer shall be followed.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] like Figure 1 As shown, the utility model is a wireless power node based on the ESP-NOW protocol, including: a voice command sending end that recognizes voice commands and converts voice commands into control commands, a receiving control end that receives control commands, and the ESP-NOW protocol based on which the control commands are sent unidirectionally to the receiving control end.

[0042] like Figure 2 and Figure 3 As shown, the voice command sending end and the receiving control end both include: a main control circuit, a startup circuit, an LED signal indication circuit, a reset circuit for realizing the main control reset, and a serial port circuit for realizing the data transmission function; wherein the LED signal indication circuit is used to indicate whether the main control chip ESP8266 is in a working state. The main control circuit includes the main control chip ESP8266, and the reset circuit, the startup circuit, the serial port circuit and the LED signal indication circuit are respectively connected to the main control chip ESP8266.

[0043] like Figure 3 As shown, the receiving control end also includes a driving circuit and a relay, and a second step-down circuit for stepping down the voltage of the external AC power supply. Figure 4 As shown, the second step-down circuit series resistor R5 is connected to the EN pin of the main control chip ESP8266, and the input end of the drive circuit is connected to a working pin of the main control chip ESP8266. The output end of the drive circuit is connected to the input end of the relay, and the output end of the relay is connected to the switch of the power node.

[0044] like Figure 3 and Fig. 9 As shown, the output end of the driving circuit is used to control the closing and separation of the relay O1.

[0045] In some embodiments, the power node is a power socket, and the relay O1 is a solid-state relay. The circuit of the relay O1 is connected to the live wire in the external power socket and controls the closing and disconnection of the live wire. The receiving control end receives the control instruction from the voice sending end, and controls the Relay1 to output high and low levels according to the control instruction, thereby controlling the separation and attraction of the solid-state relay O1, so as to control the conduction and disconnection of the power node circuit. When Relay1 is a high-level signal, the relay O1 is attracted, the live wire and the neutral wire of the power node form a path, and the power node works; when Relay1 is a low-level signal, the relay O1 is separated, the live wire and the neutral wire of the power node form a circuit break, and the power node is disconnected.

[0046] The voice command sending end can recognize voice commands and convert the recognized voice commands into control commands, and then send the control commands unidirectionally to the receiving control end based on the ESP-NOW protocol. The receiving control end can control the conduction and shutdown of the power node circuit after receiving the control signal.

[0047] like Figure 2 and Figure 4 As shown, in some embodiments, the voice command sending end also includes: a voice recognition module, a USB-to-serial port circuit for realizing firmware downloading and data communication, and a first step-down circuit for reducing the voltage of an external DC power supply introduced by the USB-to-serial port circuit to 3.2V~3.4V; the output end of the voice recognition module is connected to the serial port circuit, one end of the USB-to-serial port circuit is connected to the serial port circuit, the other end of the USB-to-serial port circuit is connected to the input end of the first step-down circuit, and the output end of the first step-down circuit is connected to the power pin VCC of the main control chip ESP8266.

[0048] In some embodiments, Figure 4This is the schematic diagram of the main control circuit. The main control chip ESP8266 has a power pin VCC, a ground pin GND, a reset pin RST, a pin ADC, an enable pin EN, a serial port pin ESP TX, a serial port pin ESP RX, an LED pin GPIO5, a pin GPIO14, a pin GPIO12, a pin GPIO13, a pin GPIO15, a pin GPIO16, a pin GPIO2, a pin GPIO0, a pin GPIO4, a pin GPIO5, a chip select pin CS0, a receive pin MISO, a pin GPIO9, a pin GPIO10, a send pin MOSI and a serial clock pin SCLK connected to other circuits, as well as LOCK1, LOCK2, TXD0 and RXD0. Among them, the power pin VCC leads to a high-level voltage to maintain the operation of the main control circuit; the reset pin RST pin is connected to the reset circuit to support the reset and restart function of the main control circuit; the enable pin EN is used to ensure the normal operation of the main control circuit; the serial port pin ESP_TX and the serial port pin ESP RX are connected to the serial port circuit to support external data download; the pins GPIO15, GPIO2, and GPIO0 are connected to the startup circuit; by closing the button S2, the working mode of the main control circuit is switched; the pin GPIO12 is connected to the drive circuit to provide a high and low level signal Relay1 to control the opening and closing of the startup circuit. Pin ADC, pin GPIO4, pin GPIO13, pin GPIO14 and the rest of the pins are all floating and not used.

[0049] like Figure 5 As shown, in some embodiments, the reset circuit includes a capacitor C5, one end of the capacitor C5 is connected to the reset pin RST of the main control chip ESP8266, the other end of the capacitor C5 is grounded, and a short-circuit switch S1 for controlling the charging and discharging of the capacitor C5 is also connected in parallel at both ends of the capacitor C5. By connecting a short-circuit switch S1 in parallel at both ends of the capacitor C5, the charging and discharging of the capacitor C5 is controlled to achieve the main control reset. In some embodiments, as Figure 5 As shown, a resistor R11 is connected in series between the capacitor C5 and the dot, the value of the resistor R11 is 10K ohms, and the value of the capacitor C5 is 0.1uF.

[0050] like Figure 6 As shown, in some embodiments, the serial port circuit includes a resistor R6 and a resistor R7, and the resistor R6 and the resistor R7 are connected to the serial port pin of the main control chip ESP8266.

[0051] In some embodiments, the serial port circuit includes a connection port H2, wherein ports 2 and 3 are respectively connected to pins ESP1 TX and ESP1 RX of the main control circuit; port 4 is connected to a 3.3V operating voltage; and port 1 is grounded.

[0052] like Figure 7As shown, in some embodiments, the LED signal indication circuit is connected to the working pin of the main control chip ESP8266 through the resistor R12, that is, the LED general input and output pin GPIO5. When the main control chip ESP8266 is in working state, the LED light is always on; when the main control chip ESP8266 receives the signal, the LED light starts to flash. The LED signal indication circuit also includes an LED light interface H3, and the interface H3 is provided with 1 and 2 interfaces, wherein the 3.3V working voltage is connected to the positive electrode 1 interface of the LED light, and the negative electrode 2 interface is connected to the LED pin GPIO5 of the main control chip ESP8266 through R12.

[0053] like Figure 8 As shown, in some embodiments, the startup circuit includes a resistor R8, a resistor R9, a resistor R10 and a button S2, wherein the resistor R8, the resistor R9 and the resistor R10 are connected to the working pins GPIO0, GPIO2 and GPIO15 of the main control chip ESP8266 one by one, respectively, and the resistor R8 and the resistor R9 are connected to the DC power supply A1, and the power supply voltage of the DC power supply A1 is +3.3.V. The button S2 is connected in series with the resistor R8 and the resistor R10 is connected to the ground. The working state of the startup circuit is switched by controlling the closing of the button S2. When the button S2 is closed, the startup circuit provides a low level, and when S2 is disconnected, the startup circuit provides a high level, thereby controlling the switching of the working state of the main control chip.

[0054] In some implementations, the values ​​of the resistors R8 , R9 , and R10 are all 10K ohms.

[0055] like Fig. 9 As shown, in some embodiments, in the receiving control end, the driving circuit includes a transistor Q1, the base of the transistor Q1 is connected to a resistor R3, and the base and emitter of the transistor are connected to a resistor R4; a resistor R2 is connected in parallel at both ends of the relay, and the relay is connected in series with the collector of the transistor.

[0056] In some implementations, the driving circuit further includes a connection port H4, the power node is a power socket S3, and the values ​​of the resistors R3, R4, and R2 are 1K ohms, 1K ohms, and 10K ohms, respectively.

[0057] The main control circuit transmits a high and low level signal Relay1, and controls the on and off of the transistor Q1 by inputting Relay1, thereby controlling the action of the driving circuit.

[0058] like Fig.10As shown, in some embodiments, in the receiving control end, the second buck circuit includes capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistor R1, isolated voltage-stabilized power supply U1, and buck chip U2. The external AC power supply is connected in series with the isolated voltage-stabilized power supply U1 and the Vin pin of the buck chip U2 in sequence, the capacitor C1 and the capacitor C2 are connected in parallel between the Vin pin of the buck chip U2 and the ground, the capacitor C3 and the capacitor C4 are connected in parallel between the VOUT pin of the buck chip U2 and the ground, and the current-limiting resistor R1 is connected in series between the VOUT pin of the buck chip U2 and the output terminal H1.

[0059] In some embodiments, the second step-down circuit reduces the 220V external AC power supply to a 5V DC power supply through the isolated voltage-stabilizing power supply U1, which is connected in series to the Vin pin of the step-down chip U2, and then reduced to a 3.3V DC voltage, and then uses the working voltage as the input voltage to drive the remaining circuits mentioned above to work.

[0060] Fig.10 In the figure, DG1 is an external AC power supply of 220V, the values ​​of capacitors C1 and C2 are 0.1uf and 22uf respectively, the values ​​of capacitors C3 and C4 are 0.1uf and 22uf respectively; the value of resistor R1 is 1K ohm.

[0061] like Fig.11 As shown, in some embodiments, in the voice command sending end, the first buck circuit includes a buck chip U2, an input filter capacitor C1, an input filter capacitor C2, an output filter capacitor C3, an output filter capacitor C4, a Schottky diode D1 and a resistor R4. Among them, the external DC power supply is connected to the pin Vin of the buck chip U3 through the series connection of the Schottky diode D1, the input filter capacitor C1 and the input filter capacitor C2 are connected in parallel to the pin Vin of the buck chip U3 and the ground; the output filter capacitor C3 and the output filter capacitor C4 are connected in parallel to the VOUT pin of the buck chip U3 and the ground; the VOUT pin of the buck chip U3 and the resistor R4 are connected in series to the output terminal H6.

[0062] like Fig.11 As shown, the external DC power supply of the first step-down circuit is H5, the output indicator light module is H6, and the external DC power supply H5 is 5V.

[0063] like Fig.12 As shown, in some embodiments, in the voice command sending end, the USB to serial port circuit is composed of a PC end, a USB TYPE-C interface and a chip CH340X, the PC end, the chip CH340X and the first step-down circuit are all connected to the USB TYPE-C interface, and the chip CH340X is connected to the serial port circuit.

[0064] like Fig.12 As shown, in some embodiments, the USB TYPE-C interface is provided with the following working pins: GND, VBUS, CC2, SBU1, DP2, DN1, DP1, DN2, CC1 and SBU2; the chip CH340X is provided with the following working pins: UD+, UD-, GND, RTS#, CTS#, V3, RXD, TXD, VCC and TNOW / DTR#.

[0065] In some embodiments, in the voice instruction sending end, the voice recognition module is a voice recognition module SU-03T, and the voice recognition module includes: a voice instruction sending end that recognizes voice instructions, and a voice recognition module that converts the recognized voice instructions into control instructions.

[0066] The voice recognition module SU-03T is a low-cost, low-power, small-volume offline voice recognition module. The module supports custom wake-up words and sentences, and can receive and recognize non-specific human voices. The voice recognition module SU-03T realizes voice recognition by writing the voice module program and voice control program that need to be recognized separately and burning the voice recognition chip and the single-chip microcomputer separately. The voice recognition module can receive non-specific human voices. When the voice recognition module recognizes non-specific human voices such as "power on" and "power off", the preset voice command will output recognition information and send the recognition information to the main control through the serial port. The main control receives the recognition information and sends the control command to the receiving control end according to the recognition information, which is received by the receiving control end. Through the SU-03T module, the voice command sending end can recognize the voice command and convert the recognized voice command into a control command, and then send the control command to the receiving control end in one direction based on the ESP-NOW protocol.

[0067] The embodiments described above are part of the embodiments of the utility model, but not all of the embodiments. The detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model claimed for protection, but only represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

Claims

1. A wireless power node based on the ESP-NOW protocol, characterized in that: The wireless power node includes: a voice command sending end for recognizing voice commands and converting the voice commands into control commands, a receiving control end for receiving the control commands, and an ESP-NOW protocol based on which the control commands are sent unidirectionally to the receiving control end; The voice command sending end and the receiving control end both include: a main control circuit, a start-up circuit, an LED signal indication circuit, a reset circuit for realizing a main control reset, and a serial port circuit for realizing a data transmission function; The receiving control end also includes a driving circuit and a relay, and a second step-down circuit for stepping down the voltage of an external AC power supply; the second step-down circuit is connected in series with a resistor R5 to the EN pin of the main control chip ESP8266, and the input end of the driving circuit is connected to a working pin of the main control chip ESP8266; the output end of the driving circuit is connected to the input end of the relay, and the output end of the relay is connected to the switch of the power node; The main control circuit comprises a main control chip ESP8266, and the reset circuit, serial port circuit, LED signal indication circuit and start-up circuit are respectively connected to the main control chip ESP8266.

2. The wireless power node according to claim 1, characterized in that: The voice command sending end also includes: a voice recognition module, a USB-to-serial port circuit for realizing firmware downloading and data communication, and a first step-down circuit for reducing the voltage of an external DC power supply introduced by the USB-to-serial port circuit to 3.2V~3.4V; the output end of the voice recognition module is connected to the serial port circuit, one end of the USB-to-serial port circuit is connected to the serial port circuit, the other end of the USB-to-serial port circuit is connected to the input end of the first step-down circuit, and the output end of the first step-down circuit is connected to the main control chip ESP8266.

3. The wireless power node according to claim 2, characterized in that: The reset circuit includes a capacitor C5, one end of which is connected to the reset pin RST of the main control chip ESP8266, the other end of which is grounded, and a short-circuit switch S1 for controlling the charging and discharging of the capacitor C5 is also connected in parallel at both ends of the capacitor C5.

4. The wireless power node according to claim 3, characterized in that: The serial port circuit includes a resistor R6 and a resistor R7, and the resistor R6 and the resistor R7 are connected to the serial port pins of the main control chip ESP8266; The LED signal indication circuit is connected to the working pin of the main control chip ESP8266 through the resistor R12.

5. The wireless power node according to claim 4, characterized in that: The startup circuit includes a resistor R8, a resistor R9, a resistor R10 and a button S2, one end of each of the resistors R8, R9 and R10 is connected to the corresponding working pins of the main control chip ESP8266, the other end of each of the resistors R8 and R9 is connected to a DC power supply A1, the button S2 is connected in series with the resistor R8 and is grounded, and the resistor R10 is directly grounded.

6. The wireless power node according to claim 5, characterized in that: In the receiving control end, the driving circuit includes a transistor, the base of the transistor Q1 is connected to a resistor R3, and the base and emitter of the transistor are connected to a resistor R4; a resistor R2 is connected in parallel at both ends of the relay, and the relay is connected in series with the collector of the transistor.

7. The wireless power node according to claim 6, characterized in that: In the receiving control end, the second step-down circuit includes capacitor C1, capacitor C2, capacitor C3, capacitor C4, current limiting resistor R1, isolated voltage-stabilized power supply U1, and step-down chip U2; the external AC power supply is connected in series with the isolated voltage-stabilized power supply U1 and the Vin pin of the step-down chip U2 in sequence, the capacitor C1 and capacitor C2 are connected in parallel between the Vin pin of the step-down chip U2 and the ground, the capacitor C3 and capacitor C4 are connected in parallel between the VOUT pin of the step-down chip U2 and the ground, and the current limiting resistor R1 is connected in series between the VOUT pin of the step-down chip U2 and the output end H1.

8. The wireless power node according to claim 5, characterized in that: In the voice command sending end, the first step-down circuit includes a step-down chip U3, an input filter capacitor C1, an input filter capacitor C2, an output filter capacitor C3, an output filter capacitor C4, a Schottky diode D1 and a resistor R4; wherein, the external DC power supply is connected to the pin Vin of the step-down chip U3 through the series connection of the Schottky diode D1, the input filter capacitor C1 and the input filter capacitor C2 are connected in parallel to the pin Vin of the step-down chip U3 and the ground; the output filter capacitor C3 and the output filter capacitor C4 are connected in parallel to the VOUT pin of the step-down chip U3 and the ground; the VOUT pin of the step-down chip U3 and the resistor R4 are connected in series to the output end H6.

9. The wireless power node according to claim 8, characterized in that: In the voice command sending end, the USB to serial port circuit is composed of a PC end, a USB TYPE-C interface and a chip CH340X. The PC end, the chip CH340X and the first step-down circuit are all connected to the USB TYPE-C interface, and the chip CH340X is connected to the serial port circuit.

10. The wireless power node according to claim 9, characterized in that: In the voice instruction sending end, the voice recognition module is a voice recognition module SU-03T, and the voice recognition module includes: a voice instruction sending end that recognizes voice instructions, and the voice recognition module is a voice recognition module that converts the recognized voice instructions into control instructions.

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