An essential AI voice intelligent access control system

Abstract

This invention discloses a basic AI voice-controlled intelligent access control system, including an access control unit and multiple indoor intercoms that communicate with the access control unit. The access control unit has a communication module and is connected to an access control cloud platform via the communication module. Each indoor intercom has a WiFi module and is connected to the access control cloud platform via the communication module, enabling information interaction between the indoor intercom and the access control unit. A mobile terminal is connected to the access control cloud platform via a communication network. Each indoor intercom also has a voice module connected to its main control CPU. The mobile terminal is connected to the access control cloud platform via the communication network, allowing the mobile terminal to be integrated with the indoor intercoms for convenient control from the mobile device. This prevents situations where a user is unable to open the door for guests due to a sudden loss of WiFi at home, transforming a traditional, single-function access control device into a powerful, interactive, multimedia, and security-integrated AI intelligent device.

Description

Technical Field

[0001] This invention relates to the technical field of access control systems, specifically a basic AI voice-controlled intelligent access control system. Background Technology

[0002] AI is ubiquitous in modern life, from functional execution to proactive perception, empowering future living with its embodied intelligence. AI technology has moved from concept to practical application, successfully driving industrial upgrading as a core engine. This year, large-scale AI models from China, such as DeepSeek, have amazed the world, bringing new possibilities for the accelerated application of AI across various industries. As an industry closely connected to consumers' daily lives, the security industry is at the forefront of this technological revolution. The emergence of large-scale AI models provides a key technological breakthrough path for the leap in security intelligence. AI will endow security products with the ability to perceive, think, and make decisions, transforming them from functional to personalized services, truly becoming assistants to users' intelligent lives.

[0003] Traditional security intercom systems typically consist of a facial recognition intercom access control unit installed downstairs, and a tablet intercom unit installed in each apartment on each floor. The tablet intercom units are connected to the downstairs access control unit via wired network cables. Common indoor intercom tablets are available in sizes such as 4-inch, 6-inch, 8-inch, and 10-inch, and are installed and fixed next to the apartment's main door. These large displays are primarily used for video communication with downstairs guests and to verify their identity. While these large LCD tablets have high-end hardware, they are largely wasted resources due to their limited applications beyond video communication, door opening, and monitoring. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a basic AI voice-activated intelligent access control system.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention discloses a basic AI voice-based intelligent access control system, comprising an access control unit and multiple indoor intercoms that are communicatively connected to the access control unit. The access control unit is equipped with a communication module and is connected to an access control cloud platform via the communication module. Each indoor intercom is equipped with a WiFi module and is connected to the access control cloud platform via the communication module, thus enabling information exchange between the indoor intercoms and the access control unit via the access control cloud platform. A mobile terminal is connected to the access control cloud platform via a communication network. The indoor intercom is equipped with a temperature sensor and a humidity sensor. The temperature sensor is used to detect the outdoor temperature, and the humidity sensor is used to detect the outdoor humidity. The temperature and humidity values ​​are displayed. The indoor intercom is also equipped with a voice module connected to the main control CPU of the indoor intercom. The voice module includes a voice signal processing module, a voice feedback circuit module, a microphone module, and a voice power amplifier circuit module. The main control CPU of the indoor intercom is connected to the voice signal processing module, and the voice feedback circuit module is located between the voice signal processing module and the speaker module to feedback the voice signal played by the speaker. The voice power amplifier circuit module is located between the voice signal processing module and the speaker module, and the microphone module is connected to the voice signal processing module.

[0006] As a preferred embodiment of the present invention, the voice acquisition circuit module includes resistors R711, R712, R709, R713, R723 and R724, and capacitors C714, C715, C716 and C717. The feedback signal AMP_SPK1+ terminal at the speaker interface is connected to one end of resistor R711, one end of resistor R709, and one end of capacitor C715. The other end of resistor R709 is connected to one end of resistor R723 and one end of capacitor C714, and the other end of resistor R723 is connected to the main control audio analog signal input port of the voice CODEC chip. The feedback signal AMP_SPK1- terminal at the speaker interface is connected to one end of resistor R712, one end of resistor R713, and one end of capacitor C717. The other end of resistor R713 is connected to one end of capacitor C716 and one end of resistor R724. The other end of resistor R724 is connected to the main control audio analog signal input port of the voice CODEC chip. The other ends of resistor R711, resistor R712, capacitor C714, capacitor C715, capacitor C716, and capacitor C717 are grounded.

[0007] As a preferred embodiment of the present invention, the voice signal processing module 701 includes a voice CODEC chip U700, capacitors C700, C701, C702, C703, C704, C705, C706, C707, C708, C709, C710, C711, C712 and C713; and resistors R701, R702, R703, R704, R705, R706, R707 and R708. The voice CODEC chip U700 is connected to the 1V8_IO power supply via the IIC communication interface I2C1_SCL and pull-up resistor R702. I2C1_SCL is connected to pin 28 of the voice CODEC chip U700 via resistor R705. I2C1_SDA is connected to pull-up resistor R703 to the 1V8_IO power supply. I2C1_SDA is connected to pin 27 of the voice CODEC chip U700 through resistor R706. The 1V8_IO power supply is connected to capacitor C700, with the other end of capacitor C700 grounded. The 1V8_IO power supply is connected to pins 2 and 3 of the voice CODEC chip U700 through resistor R700, and is also connected to one end of capacitor C701, while the other end of capacitor C701 is grounded. The VCC3V3_CODEC power supply is connected to pins 16 and 17 of the voice CODEC chip U700 through resistor R701; at the same time, one end of resistor R701 connected to pins 16 and 17 of the voice CODEC chip U700 is connected to one end of capacitor C702 and one end of capacitor C703, and the other end of capacitor C702 and the other end of capacitor C703 are grounded. Pins 11 and 14 of the voice CODEC chip U700 output analog voice signals to the voice power amplifier input via the ROUT1 / DIFF_RP and ROUT2 / DIFF_RN network symbols. Pins 23 and 24 of the voice CODEC chip U700 are the signal inputs of MIC1. Pin 23 is connected to the MIC sensor via capacitor C704 and MICN_1P; pin 24 is connected to the MIC sensor via capacitor C705 and MICN_1N. Pins 21 and 22 of the voice CODEC chip U700 are the signal inputs of MIC2. Pin 21 is connected to the MIC sensor via capacitor C706 and the MICN_2P network connector; pin 22 is connected to the MIC sensor via capacitor C707 and the MICN_2N network connector. Pin 25 of the voice CODEC chip U700 outputs a 2.8V voltage to provide bias power to the MIC sensor. One end of capacitor C713 is grounded, and the other end of capacitor C713 is connected to pin 25 of the voice CODEC chip U700. Pin 20 of the voice CODEC chip U700 is connected to filter capacitor C712 to ground. Pin 19 of the voice CODEC chip U700 is connected to filter capacitor C711 to ground. Pin 10 of the voice CODEC chip U700 is connected to filter capacitor C710 to ground.

[0008] As a preferred embodiment of the present invention, the microphone module includes a MIC sensor U804, resistors R801, R803, R816 and R817, capacitors C800, C801, C803, C813 and C815; and a TVS diode D801. One end of resistor R803 is connected to the CODEC_MIC_BIAS power supply, and the other end of resistor R803 is connected to one end of capacitor C800, one end of capacitor C801, one end of resistor R816, and the Power pin of MIC sensor U804; the other ends of capacitor C800 and capacitor C801 are grounded; the other end of R816 is connected to the Output pin of MIC sensor U804. The Output pin of the MIC sensor U804 is connected to the MICIN_P pin of the voice CODEC chip U700, and is also connected to one end of the TVS diode D801, one end of capacitor C803, and one end of capacitor C813. The GND pin of the Output pin of the MIC sensor U804 is connected to the MICIN_N pin of the voice CODEC chip U700, and is also connected to the other end of capacitor C803, one end of capacitor C815, one end of capacitor C813, and one end of resistor R817. The other ends of capacitor C815, capacitor C813, and resistor R817 are grounded.

[0009] As a preferred embodiment of the present invention, the voice power amplifier circuit module includes a power amplifier chip U801; The VCC_BAT power supply is filtered by capacitor C819 and supplies power to pin 3 of the power amplifier chip U801. The other end of capacitor C819 is connected to GND. The VCC_BAT power supply is filtered by capacitors C818 and C817, and the other ends of capacitors C818 and C817 are grounded. The VCC_BAT power supply is connected to one end of power inductor L801, and the other end of power inductor L801 is connected to pin 18 of the power amplifier chip U801 to provide power. Pin 17 of the power amplifier chip U801 is connected to pin 19 of the power amplifier chip U801 through capacitor C812. Pin 19 of the power amplifier chip U801 is filtered by capacitors C810 and C811, and the other ends of capacitors C810 and C811 are grounded. The reset signal on pin 4 of the power amplifier chip U801 is connected to the main control CPU via the SPK_RST network identifier; Pin 9 of power amplifier chip U801 is connected to the main control CPU via current limiting resistor R805 and the I2C2_SDA network identifier; pin 10 of power amplifier chip U801 is connected to the main control CPU via current limiting resistor R806 and the I2C2_SCL network identifier; pins 5, 6, 15, 14, 13, 11, 12, 16, and 1 of power amplifier chip U801 are grounded; The 7th pin of the power amplifier chip U801 is connected to one end of the capacitor C814, and the other end of the capacitor C814 is connected to one end of the resistor R809. The other end of the resistor R809 is connected to the voice CODEC chip U700 through the ROUT1 / DIFF_RP network identifier. The 8th pin of the power amplifier chip U801 is connected to one end of the capacitor C816, the other end of the capacitor C816 is connected to one end of the resistor R810, and the other end of the resistor R810 is connected to the voice CODEC chip U700 through the ROUT2 / DIFF_RN network identifier. The second pin of the power amplifier chip U801 is connected to one end of the ferrite bead FB806. The other end of FB806 is connected to one end of capacitor C809, one end of TVS diode D811, and one end of the second pin of speaker socket J806. One end of capacitor C809 and the other end of TVS diode D811 are grounded. The other end of FB806 is also connected to one end of resistor R812. The other end of resistor R812 is connected to the speaker module through the AMP_SPK1+ network identifier. Pin 20 of the power amplifier chip U801 is connected to one end of the ferrite bead FB805. The other end of FB805 is connected to one end of capacitor C805, one end of TVS diode D810, pin 1 of speaker socket J806, and one end of resistor R811. Pins 3 and 4 of connector J806 are grounded. The other end of capacitor C805 and the other end of TVS diode D810 are grounded, and the other end of resistor R811 is connected to the speaker module through the AMP_SPK1 network identifier.

[0010] The beneficial effects of this invention are: 1. This basic AI voice-controlled smart access control system features an indoor intercom with a WiFi module. The intercom connects to the access control cloud via a communication module, enabling information exchange between the intercom and the access control machine. The mobile terminal connects to the access control cloud via a communication network, thus eliminating the constraints of traditional network cables. Previously, it could only be installed in a fixed indoor location; now it can be placed anywhere in the home for convenience. The mobile terminal connects to the access control cloud via a communication network, allowing it to be integrated with the indoor intercom for convenient control from the mobile device. This prevents the awkward situation of being unable to open the door for guests due to a sudden loss of WiFi.

[0011] 2. This basic AI voice intelligent access control system has a voice module connected to the main control CPU of the indoor intercom. The voice module includes a voice signal processing module, a voice feedback circuit module, a microphone module, and a voice power amplifier circuit module. This gives the voice module a better listening experience and facilitates music playback and voice chat. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a basic AI voice-controlled intelligent access control system according to the present invention; Figure 2 This is a system block diagram of an indoor intercom for a basic AI voice-controlled intelligent access control system according to the present invention; Figure 3 This is a circuit diagram of the voice signal processing module of a basic AI voice-controlled intelligent access control system according to the present invention; Figure 4 This is a circuit diagram of the voice acquisition circuit module of a basic AI voice intelligent access control system according to the present invention.

[0013] Figure 5 This is a circuit diagram of the microphone module of a basic AI voice-controlled intelligent access control system according to the present invention; Figure 6 This is a circuit diagram of the voice power amplifier circuit module of a basic AI voice intelligent access control system according to the present invention; Figure 7 This is a circuit diagram of the Bluetooth module of a basic AI voice-controlled intelligent access control system according to the present invention. Figure 8 This is a circuit diagram of the WiFi module of a basic AI voice-controlled intelligent access control system according to the present invention; Figure 9 This is a partial circuit diagram of the WiFi module of a basic AI voice-controlled intelligent access control system according to the present invention; Figure 10 This is a schematic diagram of the relevant circuits for the temperature sensor and humidity sensor in a basic AI voice-controlled intelligent access control system according to the present invention. In the diagram: 1. Access control machine; 2. Indoor intercom; 3. Communication module; 4. Access control cloud platform; 5. WiFi module; 6. Temperature sensor; 7. Voice module; 701. Voice signal processing module; 702. Voice feedback circuit module; 703. Microphone module; 704. Voice power amplifier circuit module; 8. Humidity sensor; 9. Bluetooth module. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] Example: Figure 1 , Figure 2As shown, the present invention discloses a basic AI voice-controlled intelligent access control system, including an access control unit 1 and multiple indoor intercoms 2 that are communicatively connected to the access control unit 1. The access control unit is equipped with a communication module 3, and the access control unit 1 is connected to an access control cloud platform 4 via the communication module 3. Each indoor intercom 2 is equipped with a WiFi module 5, and the intercom 2 is connected to the access control cloud platform 4 via the communication module 3. Thus, the indoor intercom 2 interacts with the access control unit 1 via the access control cloud platform 4. The mobile terminal is connected to the access control cloud platform 4 via a communication network.

[0016] An indoor intercom 2 is equipped with a WiFi module 5. The indoor intercom 2 connects to the access control cloud platform 4 via a communication module 3, allowing it to interact with the access control machine 1. The mobile terminal connects to the access control cloud platform 4 via a communication network, thus solving the limitations of traditional network cables. Previously, it could only be installed in a fixed indoor location; now it can be placed anywhere in the home for convenience. The mobile terminal connects to the access control cloud platform 4 via the communication network, allowing it to be integrated with the indoor intercom 2 for convenient control from the mobile device. This prevents the awkward situation of not being able to open the door for guests in case of a sudden WiFi outage.

[0017] The indoor intercom 2 is equipped with a temperature sensor 5 and a humidity sensor 6. The temperature sensor 5 is used to detect the outdoor temperature, and the humidity sensor 6 is used to detect the outdoor humidity. The temperature and humidity values ​​are displayed. The indoor intercom 2 is also equipped with a voice module 7 connected to the main control CPU of the indoor intercom 2. Users can keep track of weather changes in real time, or the access control machine can be activated by voice to obtain the weather information from the network and broadcast it to the user.

[0018] The system incorporates AI-powered intelligent voice control. Users can wake the machine with voice commands, such as "Xiao Fang, Xiao Fang, open the door." Wake-up words can be customized to personal preferences, trained three times, and then recorded and saved on the machine. After waking the machine, users can engage in intelligent voice intercom, chat, riddles, and idiom chain games. Voice unlocking is also possible. Voice control of the downstairs access control lock eliminates the need for a person to physically approach the indoor access control machine and press a button. This is more user-friendly and convenient. After voice activation, the machine can play online music and radio, retrieve real-time weather forecasts from the machine's IP address location, announce the time via voice, and set and deactivate alarms using AI voice commands, achieving true human-machine language interaction.

[0019] The voice module 7 includes a voice signal processing module 701, a voice feedback circuit module 702, a microphone module 703, and a voice power amplifier circuit module 704. The main control CPU of the indoor intercom 2 is connected to the voice signal processing module 701, and the voice feedback circuit module 702 is located between the voice signal processing module 701 and the speaker module for feedback of the voice signal played by the speaker. The voice power amplifier circuit module 704 is located between the voice signal processing module 701 and the speaker module, and the microphone module 703 is connected to the voice signal processing module 701.

[0020] The speaker amplifier power has been increased to 5W. Traditional access control systems typically use around 2W; this is also greater than most portable speakers, with most Bluetooth speakers around 3-4W. Utilizing a professional acoustic design cavity, it delivers excellent transient response, resolution, and frequency response, presenting a powerful and full-bodied listening experience. Equipped with a 1.57-inch full-range speaker, it boasts loud volume and a wide soundstage. Whether at home, in the countryside, cycling, hiking, or at a beach party, it's portable and allows you to enjoy music. Add some fun to your life when you're bored at home. Play a song and access hundreds of millions of audio content. Music, radio, camera, audiobooks—listen to whatever you want, and the effect is fantastic. Dynamic lyrics display makes it easy to see great music, and switching songs and saving tracks is convenient.

[0021] Among them, such as Figure 4 As shown, the voice acquisition circuit module 702 includes resistors R711, R712, R709, R713, R723 and R724, and capacitors C714, C715, C716 and C717. The feedback signal AMP_SPK1+ terminal at the speaker interface is connected to one end of resistor R711, one end of resistor R709, and one end of capacitor C715. The other end of resistor R709 is connected to one end of resistor R723 and one end of capacitor C714, and the other end of resistor R723 is connected to the main control audio analog signal input port of the voice CODEC chip. The feedback signal AMP_SPK1- terminal at the speaker interface is connected to one end of resistor R712, one end of resistor R713, and one end of capacitor C717. The other end of resistor R713 is connected to one end of capacitor C716 and one end of resistor R724. The other end of resistor R724 is connected to the main control audio analog signal input port of the voice CODEC chip. The other ends of resistor R711, resistor R712, capacitor C714, capacitor C715, capacitor C716, and capacitor C717 are grounded.

[0022] Among them, such as Figure 3As shown, the voice signal processing module 701 includes a voice CODEC chip U700, capacitors C700, C701, C702, C703, C704, C705, C706, C707, C708, C709, C710, C711, C712, and C713; and resistors R701, R702, R703, R704, R705, R706, R707, and R708. The voice CODEC chip U700 is connected to the 1V8_IO power supply via the IIC communication interface I2C1_SCL and pull-up resistor R702. I2C1_SCL is connected to pin 28 of the voice CODEC chip U700 via resistor R705. I2C1_SDA is connected to pull-up resistor R703 to the 1V8_IO power supply. I2C1_SDA is connected to pin 27 of the voice CODEC chip U700 through resistor R706. The 1V8_IO power supply is connected to capacitor C700, with the other end of capacitor C700 grounded. The 1V8_IO power supply is connected to pins 2 and 3 of the voice CODEC chip U700 through resistor R700, and is also connected to one end of capacitor C701, while the other end of capacitor C701 is grounded. The VCC3V3_CODEC power supply is connected to pins 16 and 17 of the voice CODEC chip U700 through resistor R701; at the same time, one end of resistor R701 connected to pins 16 and 17 of the voice CODEC chip U700 is connected to one end of capacitor C702 and one end of capacitor C703, and the other end of capacitor C702 and the other end of capacitor C703 are grounded. Pins 11 and 14 of the voice CODEC chip U700 output analog voice signals to the voice power amplifier input via the ROUT1 / DIFF_RP and ROUT2 / DIFF_RN network symbols. Pins 23 and 24 of the voice CODEC chip U700 are the signal inputs of MIC1. Pin 23 is connected to the MIC sensor via capacitor C704 and MICN_1P; pin 24 is connected to the MIC sensor via capacitor C705 and MICN_1N. Pins 21 and 22 of the voice CODEC chip U700 are the signal inputs of MIC2. Pin 21 is connected to the MIC sensor via capacitor C706 and the MICN_2P network connector; pin 22 is connected to the MIC sensor via capacitor C707 and the MICN_2N network connector. Pin 25 of the voice CODEC chip U700 outputs a 2.8V voltage to provide bias power to the MIC sensor. One end of capacitor C713 is grounded, and the other end of capacitor C713 is connected to pin 25 of the voice CODEC chip U700. Pin 20 of the voice CODEC chip U700 is connected to filter capacitor C712 and ground. Pin 19 of the voice CODEC chip U700 is connected to filter capacitor C711.

[0023] like Figure 5 As shown, the microphone module (703) includes a MIC sensor U804, resistors R801, R803, R816 and R817, capacitors C800, C801, C803, C813 and C815; and a TVS diode D801. One end of resistor R803 is connected to the CODEC_MIC_BIAS power supply, and the other end of resistor R803 is connected to one end of capacitor C800, one end of capacitor C801, one end of resistor R816, and the Power pin of MIC sensor U804; the other ends of capacitor C800 and capacitor C801 are grounded; the other end of R816 is connected to the Output pin of MIC sensor U804. The Output pin of the MIC sensor U804 is connected to the MICIN_P pin of the voice CODEC chip U700, and is also connected to one end of the TVS diode D801, one end of capacitor C803, and one end of capacitor C813. The GND pin of the Output pin of the MIC sensor U804 is connected to the MICIN_N pin of the voice CODEC chip U700, and is also connected to the other end of capacitor C803, one end of capacitor C815, one end of capacitor C813, and one end of resistor R817. The other ends of capacitor C815, capacitor C813, and resistor R817 are grounded.

[0024] Among them, such as Figure 6 As shown, the voice power amplifier circuit module 704 includes a power amplifier chip U801; The VCC_BAT power supply is filtered by capacitor C819 and supplies power to pin 3 of the power amplifier chip U801. The other end of capacitor C819 is connected to GND. The VCC_BAT power supply is filtered by capacitors C818 and C817, and the other ends of capacitors C818 and C817 are grounded. The VCC_BAT power supply is connected to one end of power inductor L801, and the other end of power inductor L801 is connected to pin 18 of the power amplifier chip U801 to provide power. Pin 17 of the power amplifier chip U801 is connected to pin 19 of the power amplifier chip U801 through capacitor C812. Pin 19 of the power amplifier chip U801 is filtered by capacitors C810 and C811, and the other ends of capacitors C810 and C811 are grounded. The reset signal on pin 4 of the power amplifier chip U801 is connected to the main control CPU via the SPK_RST network identifier; Pin 9 of power amplifier chip U801 is connected to the main control CPU via current limiting resistor R805 and the I2C2_SDA network identifier; pin 10 of power amplifier chip U801 is connected to the main control CPU via current limiting resistor R806 and the I2C2_SCL network identifier; pins 5, 6, 15, 14, 13, 11, 12, 16, and 1 of power amplifier chip U801 are grounded; The 7th pin of the power amplifier chip U801 is connected to one end of the capacitor C814, and the other end of the capacitor C814 is connected to one end of the resistor R809. The other end of the resistor R809 is connected to the voice CODEC chip U700 through the ROUT1 / DIFF_RP network identifier. The 8th pin of the power amplifier chip U801 is connected to one end of the capacitor C816, the other end of the capacitor C816 is connected to one end of the resistor R810, and the other end of the resistor R810 is connected to the voice CODEC chip U700 through the ROUT2 / DIFF_RN network identifier. The second pin of the power amplifier chip U801 is connected to one end of the ferrite bead FB806. The other end of FB806 is connected to one end of capacitor C809, one end of TVS diode D811, and one end of the second pin of speaker socket J806. One end of capacitor C809 and the other end of TVS diode D811 are grounded. The other end of FB806 is also connected to one end of resistor R812. The other end of resistor R812 is connected to the speaker module through the AMP_SPK1+ network identifier. Pin 20 of the power amplifier chip U801 is connected to one end of the ferrite bead FB805. The other end of FB805 is connected to one end of capacitor C805, one end of TVS diode D810, pin 1 of speaker socket J806, and one end of resistor R811. Pins 3 and 4 of connector J806 are grounded. The other end of capacitor C805 and the other end of TVS diode D810 are grounded, and the other end of resistor R811 is connected to the speaker module through the AMP_SPK1 network identifier.

[0025] Among them, such as Figure 7 As shown, it also includes a Bluetooth module connected to the main control CPU, and the Bluetooth module includes a Bluetooth chip U1004. The VCC3V3_STB power supply is connected to one end of the filter capacitor C1057, and the other end of the filter capacitor C1057 is grounded. The VCC3V3_STB power supply is connected to one end of the FB1006 ferrite bead. The other end of the FB1006 ferrite bead is filtered by capacitors C1058 and C1059. Through the BT_3V3 network identifier, it is connected to one end of the FB1005 ferrite bead. The other end of the FB1005 ferrite bead is filtered by capacitors C1039 and C1040 to provide power to pin 1 of the Bluetooth module U1004. Pin 2 of Bluetooth chip U1004 is grounded through pull-down resistor R1033; pin 3 of Bluetooth module U1004 chip is grounded through pull-down resistor R1035; pin 4 of Bluetooth chip U1004 is connected to BT_3V3 power supply through pull-up resistor R1037. Pin 6 of the Bluetooth chip U1004 is grounded through pull-down resistor R1043; pin 7 of the Bluetooth module U1004 chip is grounded through pull-down resistor R1046. The BT_VDDIO_1V8 power supply is filtered by capacitors C1041 and C1042 to provide GPIO power to pin 8 of the Bluetooth chip U1004; pin 9 of the Bluetooth chip U1004 is grounded through pull-down resistor R1054. The main control CPU is connected to one end of the current limiting resistor R1052 through the HOST_WAKE_BT_H network identifier. The other end of the current limiting resistor R1052 is connected to one end of the lower resistor R1056 and the 10th pin of the U1004 Bluetooth chip. At the same time, the other end of the lower resistor R1056 is grounded. The main control CPU is connected through one end of the current limiting resistor R1050 via the BT_WAKE_HOST_H network identifier. The other end of the current limiting resistor R1050 is connected to one end of the lower resistor R1057 and pin 10 of the Bluetooth chip U1004. The other end of the lower resistor R1057 is grounded. The main control CPU is connected to one end of the current limiting resistor R1048 through the HOST_WAKE_WL network identifier. One end of the current limiting resistor R1048 is connected to one end of the upper connecting resistor R1047. The other end of the upper connecting resistor R1047 is connected to the BT_VDDIO_1V8 power supply. The other end of the current limiting resistor R1048 is connected to one end of the filter capacitor C1050. The other end of the filter capacitor C1050 is grounded, providing the main control on / off signal to pin 12 of the Bluetooth chip U1004. Pin 13 of Bluetooth chip U1004 is connected to one end of capacitor C1047, and the other end of capacitor C1047 is grounded; pin 14 of Bluetooth chip U1004 is connected to one end of capacitor C1048, and the other end of capacitor C1048 is grounded; pin 15 of Bluetooth chip U1004 is the input / output pin of the antenna. Pin 14 of the Bluetooth chip U1004 is connected to the antenna soldering point ANT1000 via resistor R1063. ANT1008 is the antenna feed point. The power supply BT_1V2 is filtered by capacitor C1044 to provide 1.2V power to the Bluetooth chip U1004. Pin 18 of Bluetooth chip U1004 is connected to one end of matching capacitor C1045, and then to pin 3 of Y1001 40MHz crystal oscillator; pin 19 of Bluetooth chip U1004 is connected to one end of matching capacitor C1046 through current-limiting resistor R1044, and also to pin 1 of Y1001 40MHz crystal oscillator; pins 2 and 4 of Y1001 40MHz crystal oscillator are grounded; Bluetooth chip U1004's pin 20 communicates with the main controller's UART protocol via the UART5_CTSN network identifier through current-limiting resistor R1042; Bluetooth chip U1004's pin 21 communicates with the main controller's UART protocol via the UART5_RTSN network identifier through current-limiting resistor R1038; Bluetooth chip U1004's pin 22 communicates with the main controller's UART protocol via the UART5_RX_MO network identifier through current-limiting resistor R1036; Bluetooth chip U1004's pin 23 communicates with the main controller's UART protocol via the UART5_TX_M0 network identifier through current-limiting resistor R1034. The BT_VDDIO_1V8 power supply is filtered by capacitor C1038 and connected to pin 24 of Bluetooth chip U1004 to provide power to U1004's UART GPIO. Pin 25 of Bluetooth chip U1004 is connected to signal integrity capacitor C1030, with the other end of capacitor C1030 connected to current-limiting resistor R1031, and communicates with the main controller's PCM protocol via the SAI2_SDO_MO network identifier. Pin 26 of Bluetooth chip U1004 is connected to current-limiting resistor R1030, with the other end of resistor R1030 connected to signal integrity capacitor C1030, and the other end of capacitor C1030 communicates with the main controller's PCM protocol via the SAI2_SDI_MO network identifier. Pin 27 of Bluetooth chip U1004 communicates with the main controller via the PCM protocol through signal integrity capacitor C1031, with the other end of capacitor C1031 connected to current-limiting resistor R1029 and the SAI2_LRCK_MO network identifier. Pin 28 of Bluetooth chip U1004 communicates with the main controller via the PCM protocol through signal integrity capacitor C1032, with the other end of capacitor C1032 connected to current-limiting resistor R1028 and the SAI2_SCLK_MO network identifier. Pin 29 of Bluetooth chip U1004 is connected to test point TP1010 for chip testing; the BT_3V3 power supply, after passing through filter capacitor C1028, is connected to pin 30 of Bluetooth chip U1004, providing 3.3V power to Bluetooth chip U1004; the BT_1V2 power supply, after passing through filter capacitor C1027, is connected to pin 31 of Bluetooth chip U1004, providing 1.2V power to Bluetooth chip U1004; pin 32 of Bluetooth chip U1004, the internal power manager, outputs 1.2V power, which, after passing through filter capacitors C1036 and C1035, is connected to one end of current-limiting resistor L1003, the other end of L1003 is connected to the BT_1V2 network identifier, and the other ends of capacitors C1035 and C1036 are grounded; pin 33 of Bluetooth chip U1004 is grounded.

[0026] The temperature and humidity sensors are connected to the main control CPU via a temperature and humidity circuit. The advantages of this circuit include... (The text abruptly ends here, likely due to an incomplete sentence or missing information.) Figure 10As shown, the 1V8_STB power supply is filtered by capacitor C904 and connected to pin 1 of the temperature and humidity sensor U901. The other end of capacitor C904 is grounded. Pin 4 of the U901 sensor chip is grounded. Pin 2 of the U901 chip is connected to a current-limiting resistor R912, which is connected to one end of the TVS diode D904. The other end of D904 is grounded. The other end of resistor R912 is connected to the main control CPU via the I2C2_SCL network identifier. Pin 3 of the U901 chip is connected to a current-limiting resistor R913, which is connected to one end of the TVS diode D905. The other end of D904 is grounded. The other end of resistor R913 is connected to the main control CPU via the I2C2_SDA network identifier.

[0027] The circuit of the WiFi module is as follows: Figure 8 , 9As shown, the advantages of this circuit are that the main control CPU connects to resistor R1011 via the HOST_WK_AH network identifier, and the other end of R1011 is connected to pull-up resistor R1002 to the VCC3V3_STB power supply. The other end of resistor R1011 is connected to U1001 HALOW via the HOST_WAKE_AH network identifier. Pin 18 of the WIFI module; The main control CPU uses the SDIO communication protocol, connected via the SDMMC_D2 network identifier through current-limiting resistor R1006, with the other end of resistor R1006 connected via the SDIO_D2 network identifier to pin 19 of U1001; The main control CPU uses the SDIO communication protocol, connected via the SDMMC_D3 network identifier through current-limiting resistor R1012, with the other end of resistor R1012 connected via the SDIO_D3 network identifier to pin 20 of U1001; The main control CPU uses the SDIO communication protocol, connected via the SDMMC_CMD network identifier through current-limiting resistor R1013, with the other end of resistor R1013 connected via the SDIO_CMD network identifier to pin 21 of U1001; The main control CPU uses the SDIO communication protocol, connected via the SDMMC_CLK network identifier through current-limiting resistor R1014, with the other end of resistor R1014 connected via the SDIO_CLK network identifier to pin 22 of U1001; The main control CPU uses SDI... The main control CPU uses the SDIO communication protocol, which connects to pin 22 of U1001 via the SDMMC_CLK network identifier, current-limiting resistor R1014, and the other end of resistor R1014 via the SDIO_CLK network identifier. The main control CPU uses the SDIO communication protocol, which connects to pin 23 of U1001 via the SDMMC_D0 network identifier, current-limiting resistor R1015, and the other end of resistor R1015 via the SDIO_D0 network identifier. The MMC_D1 network identifier is connected to pin 24 of U1001 via current-limiting resistor R1017, with the other end of R1017 connected to pin 24 via the SDIO_D1 network identifier. The main control CPU is connected to one end of pull-down resistor R1020 via the AH_WAKE_HOST_H network identifier, with the other end of R1020 grounded. It is also connected to pin 26 of U1001 via current-limiting resistor R1018, with the other end of R1018 connected to pin 26 via the AH_WAKE_HOST network identifier. U1001 HALOW WIFI is connected to the U1005 FLASH chip via the SPI communication protocol. Pin 8 of the U1005 FLASH chip is connected to the RF_SYS_3V3 power supply via filter capacitors C1016 and C1017. Pin 7 of the U1005 chip is connected to RF_SYS_3V3 via pull-up resistor R1022. The U1005 chip is also connected to RF_SYS_3V3 via pull-up resistor R1023.Pins 4 and 9 of U1005 are grounded; the AH_RF_VCC power supply is filtered by capacitors C1002, C1001, C1003, and C1004, providing power to pins 8, 9, and 10 of U1001. The other ends of capacitors C1002, C1001, C1003, and C1004 are grounded; the RF_SYS_3V3 power supply is filtered by current-limiting resistor R1016 and capacitors C1010 and C1011, providing power to U1001 HALOW. The WIFI module provides system power, with the other ends of capacitors C1010 and C1011 grounded. The 1V8_STB power supply is filtered by the FB1003 ferrite bead to eliminate power interference, and then provides power to the GPIO interface of the U1001 chip through capacitors C1025 and C1024. Pin 34 of the U1001 chip is pulled down to ground through resistor R1021 and pulled up to the RF_SYS_3V3 power supply through resistor R1019. The VDD_1V3 power supply is filtered by capacitors C1008 and C1007 to provide 1.3V power to the U1001 chip, with the other ends of capacitors C1008 and C1007 grounded. Pins 5, 7, 40, 45, and 46 of the U1001 chip are grounded. The RF_SYS_3V3 power supply is filtered by capacitors C1020 and C1021 to provide power to the U1003. U1003 DC TO Pin 3 of the DC chip is pulled up to pin 3 of the U1003 chip via pull-up resistor R1024; capacitor C1026 filters the pin 3; pin 2 of the U1003 chip is grounded; the function of the power management chip U1003 is to convert 3.3V to 1.3V; pin 4 of the U1003 chip is connected to pin 6 via a power inductor, and then connected to pin 1 via resistor R1025, which is grounded via resistor R1026; the U1003 outputs 1.3V power after filtering by capacitors C1022 and C1023. The other ends of capacitors C1022 and C1023 are grounded; the main controller controls the switching on and off of MOSFET Q1001 via the AH_IOA30 network identifier, thereby controlling the switching on and off of the AH_RF_VCC power supply; this allows the HALOW WIFI module to enter a power-saving mode, consuming no current. The VCC3V3_STB power supply is filtered by capacitor C1037 and connected to pin 2 of MOSFET Q1001. Pin 2 of MOSFET Q1001 is connected to pin 1 of MOSFET Q1001 via resistor R1032. Pin 1 is then connected to the CPU control switch pin via resistor R1039 and the AH_IOA30 network identifier. Pin 3 of MOSFET Q1001 provides power to AH_RF_VCC via filter capacitor C1061.

[0028] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A basic AI voice intelligent access control system, characterized in that, The system includes an access control machine (1) and multiple indoor intercoms (2) that are connected to the access control machine (1). The access control machine is equipped with a communication module (3). The access control machine (1) is connected to an access control cloud platform (4) via the communication module (3). The indoor intercoms (2) are equipped with WiFi modules (5). The intercoms (2) are connected to the access control cloud platform (4) via the communication module (3). Thus, the indoor intercoms (2) interact with the access control machine (1) via the access control cloud platform (4). The mobile terminal is connected to the access control cloud platform (4) via a communication network. The indoor intercom (2) is equipped with a temperature sensor (6) and a humidity sensor (8). The temperature sensor (5) is used to detect the outdoor temperature, and the humidity sensor (6) is used to detect the outdoor humidity and display the temperature and humidity values. The indoor intercom (2) is also equipped with a voice module (7) connected to the main control CPU of the indoor intercom (2). The voice module (7) includes a voice signal processing module (701), a voice feedback circuit module (702), a microphone module (703), and a voice power amplifier circuit module (704). The main control CPU of the indoor intercom (2) is connected to the voice signal processing module (701), and the voice feedback circuit module (702) is located between the voice signal processing module (701) and the speaker module for feedback of the voice signal played by the speaker. The voice power amplifier circuit module (704) is located between the voice signal processing module (701) and the speaker module, and the microphone module (703) is connected to the voice signal processing module (701).

2. The basic AI voice intelligent access control system according to claim 1, wherein, The voice acquisition circuit module (702) includes resistors R711, R712, R709, R713, R723 and R724, and capacitors C714, C715, C716 and C717; (Advantages of this circuit) The feedback signal AMP_SPK1+ terminal at the speaker interface is connected to one end of resistor R711, one end of resistor R709, and one end of capacitor C715. The other end of resistor R709 is connected to one end of resistor R723 and one end of capacitor C714, and the other end of resistor R723 is connected to the main control audio analog signal input port of the voice CODEC chip. The feedback signal AMP_SPK1- terminal at the speaker interface is connected to one end of resistor R712, one end of resistor R713, and one end of capacitor C717. The other end of resistor R713 is connected to one end of capacitor C716 and one end of resistor R724. The other end of resistor R724 is connected to the main control audio analog signal input port of the voice CODEC chip. The other ends of resistor R711, resistor R712, capacitor C714, capacitor C715, capacitor C716, and capacitor C717 are grounded.

3. The basic AI voice-activated intelligent access control system according to claim 1, characterized in that, The voice signal processing module (701) includes a voice CODEC chip U700, capacitors C700, C701, C702, C703, C704, C705, C706, C707, C708, C709, C710, C711, C712, and C713; and resistors R701, R702, R703, R704, R705, R706, R707, and R708. (Advantages of this circuit) The voice CODEC chip U700 is connected to the 1V8_IO power supply via the IIC communication interface I2C1_SCL and pull-up resistor R702. I2C1_SCL is connected to pin 28 of the voice CODEC chip U700 via resistor R705. I2C1_SDA is connected to pull-up resistor R703 to the 1V8_IO power supply. I2C1_SDA is connected to pin 27 of the voice CODEC chip U700 through resistor R706. The 1V8_IO power supply is connected to capacitor C700, with the other end of capacitor C700 grounded. The 1V8_IO power supply is connected to pins 2 and 3 of the voice CODEC chip U700 through resistor R700, and is also connected to one end of capacitor C701, while the other end of capacitor C701 is grounded. The VCC3V3_CODEC power supply is connected to pins 16 and 17 of the voice CODEC chip U700 through resistor R701; at the same time, one end of resistor R701 connected to pins 16 and 17 of the voice CODEC chip U700 is connected to one end of capacitor C702 and one end of capacitor C703, and the other end of capacitor C702 and the other end of capacitor C703 are grounded. Pins 11 and 14 of the voice CODEC chip U700 output analog voice signals to the voice power amplifier input via the ROUT1 / DIFF_RP and ROUT2 / DIFF_RN network symbols. Pins 23 and 24 of the voice CODEC chip U700 are the signal inputs of MIC1. Pin 23 is connected to the MIC sensor via capacitor C704 and MICN_1P; pin 24 is connected to the MIC sensor via capacitor C705 and MICN_1N. Pins 21 and 22 of the voice CODEC chip U700 are the signal inputs of MIC2. Pin 21 is connected to the MIC sensor via capacitor C706 and the MICN_2P network connector; pin 22 is connected to the MIC sensor via capacitor C707 and the MICN_2N network connector. Pin 25 of the voice CODEC chip U700 outputs a 2.8V voltage to provide bias power to the MIC sensor. One end of capacitor C713 is grounded, and the other end of capacitor C713 is connected to pin 25 of the voice CODEC chip U700. Pin 20 of the voice CODEC chip U700 is connected to filter capacitor C712 to ground. Pin 19 of the voice CODEC chip U700 is connected to filter capacitor C711 to ground. Pin 10 of the voice CODEC chip U700 is connected to filter capacitor C710 to ground.

4. A basic AI voice-activated intelligent access control system according to claim 2, characterized in that, The microphone module (703) includes a MIC sensor U804, resistors R801, R803, R816 and R817, capacitors C800, C801, C803, C813 and C815; and a TVS diode D801. (Advantages of this circuit) One end of resistor R803 is connected to the CODEC_MIC_BIAS power supply, and the other end of resistor R803 is connected to one end of capacitor C800, one end of capacitor C801, one end of resistor R816, and the Power pin of MIC sensor U804; the other ends of capacitor C800 and capacitor C801 are grounded; the other end of R816 is connected to the Output pin of MIC sensor U804. The Output pin of the MIC sensor U804 is connected to the MICIN_P pin of the voice CODEC chip U700, and is also connected to one end of the TVS diode D801, one end of capacitor C803, and one end of capacitor C813. The GND pin of the Output pin of the MIC sensor U804 is connected to the MICIN_N pin of the voice CODEC chip U700, and is also connected to the other end of capacitor C803, one end of capacitor C815, one end of capacitor C813, and one end of resistor R817. The other ends of capacitor C815, capacitor C813, and resistor R817 are grounded.

5. A basic AI voice-activated intelligent access control system according to claim 1, characterized in that, The voice power amplifier circuit module (704) includes a power amplifier chip U801; The VCC_BAT power supply is filtered by capacitor C819 and supplies power to pin 3 of the power amplifier chip U801. The other end of capacitor C819 is connected to GND. The VCC_BAT power supply is filtered by capacitors C818 and C817, and the other ends of capacitors C818 and C817 are grounded. The VCC_BAT power supply is connected to one end of power inductor L801, and the other end of power inductor L801 is connected to pin 18 of the power amplifier chip U801 to provide power. Pin 17 of the power amplifier chip U801 is connected to pin 19 of the power amplifier chip U801 through capacitor C812. Pin 19 of the power amplifier chip U801 is filtered by capacitors C810 and C811, and the other ends of capacitors C810 and C811 are grounded. The reset signal on pin 4 of the power amplifier chip U801 is connected to the main control CPU via the SPK_RST network identifier; Pin 9 of power amplifier chip U801 is connected to the main control CPU via current limiting resistor R805 and the I2C2_SDA network identifier; pin 10 of power amplifier chip U801 is connected to the main control CPU via current limiting resistor R806 and the I2C2_SCL network identifier; pins 5, 6, 15, 14, 13, 11, 12, 16, and 1 of power amplifier chip U801 are grounded; The 7th pin of the power amplifier chip U801 is connected to one end of the capacitor C814, and the other end of the capacitor C814 is connected to one end of the resistor R809. The other end of the resistor R809 is connected to the voice CODEC chip U700 through the ROUT1 / DIFF_RP network identifier. The 8th pin of the power amplifier chip U801 is connected to one end of the capacitor C816, the other end of the capacitor C816 is connected to one end of the resistor R810, and the other end of the resistor R810 is connected to the voice CODEC chip U700 through the ROUT2 / DIFF_RN network identifier. The second pin of the power amplifier chip U801 is connected to one end of the ferrite bead FB806. The other end of FB806 is connected to one end of capacitor C809, one end of TVS diode D811, and one end of the second pin of speaker socket J806. One end of capacitor C809 and the other end of TVS diode D811 are grounded. The other end of FB806 is also connected to one end of resistor R812. The other end of resistor R812 is connected to the speaker module through the AMP_SPK1+ network identifier. Pin 20 of the power amplifier chip U801 is connected to one end of the ferrite bead FB805. The other end of FB805 is connected to one end of capacitor C805, one end of TVS diode D810, pin 1 of speaker socket J806, and one end of resistor R811. Pins 3 and 4 of connector J806 are grounded. The other end of capacitor C805 and the other end of TVS diode D810 are grounded, and the other end of resistor R811 is connected to the speaker module through the AMP_SPK1 network identifier.

6. A basic AI voice-activated intelligent access control system according to claim 5, characterized in that, It also includes a Bluetooth module (9) connected to the main control CPU. The Bluetooth module (9) includes a Bluetooth chip U1004. (Advantages of this circuit) The VCC3V3_STB power supply is connected to one end of the filter capacitor C1057, and the other end of the filter capacitor C1057 is grounded. The VCC3V3_STB power supply is connected to one end of the FB1006 ferrite bead. The other end of the FB1006 ferrite bead is filtered by capacitors C1058 and C1059. Through the BT_3V3 network identifier, it is connected to one end of the FB1005 ferrite bead. The other end of the FB1005 ferrite bead is filtered by capacitors C1039 and C1040 to provide power to pin 1 of the Bluetooth module U1004. Pin 2 of Bluetooth chip U1004 is grounded through pull-down resistor R1033; pin 3 of Bluetooth module U1004 chip is grounded through pull-down resistor R1035; pin 4 of Bluetooth chip U1004 is connected to BT_3V3 power supply through pull-up resistor R1037. Pin 6 of the Bluetooth chip U1004 is grounded through pull-down resistor R1043; pin 7 of the Bluetooth module U1004 chip is grounded through pull-down resistor R1046. The BT_VDDIO_1V8 power supply is filtered by capacitors C1041 and C1042 to provide GPIO power to pin 8 of the Bluetooth chip U1004; pin 9 of the Bluetooth chip U1004 is grounded through pull-down resistor R1054. The main control CPU is connected to one end of the current limiting resistor R1052 through the HOST_WAKE_BT_H network identifier. The other end of the current limiting resistor R1052 is connected to one end of the lower resistor R1056 and the 10th pin of the U1004 Bluetooth chip. At the same time, the other end of the lower resistor R1056 is grounded. The main control CPU is connected through one end of the current limiting resistor R1050 via the BT_WAKE_HOST_H network identifier. The other end of the current limiting resistor R1050 is connected to one end of the lower resistor R1057 and pin 10 of the Bluetooth chip U1004. The other end of the lower resistor R1057 is grounded. The main control CPU is connected to one end of the current limiting resistor R1048 through the HOST_WAKE_WL network identifier. One end of the current limiting resistor R1048 is connected to one end of the upper connecting resistor R1047. The other end of the upper connecting resistor R1047 is connected to the BT_VDDIO_1V8 power supply. The other end of the current limiting resistor R1048 is connected to one end of the filter capacitor C1050. The other end of the filter capacitor C1050 is grounded, providing the main control on / off signal to pin 12 of the Bluetooth chip U1004. Pin 13 of Bluetooth chip U1004 is connected to one end of capacitor C1047, and the other end of capacitor C1047 is grounded; pin 14 of Bluetooth chip U1004 is connected to one end of capacitor C1048, and the other end of capacitor C1048 is grounded; pin 15 of Bluetooth chip U1004 is the input / output pin of the antenna. Pin 14 of the Bluetooth chip U1004 is connected to the antenna soldering point ANT1000 via resistor R1063. ANT1008 is the antenna feed point. The power supply BT_1V2 is filtered by capacitor C1044 to provide 1.2V power to the Bluetooth chip U1004. Pin 18 of Bluetooth chip U1004 is connected to one end of matching capacitor C1045, and then to pin 3 of Y1001 40MHz crystal oscillator; pin 19 of Bluetooth chip U1004 is connected to one end of matching capacitor C1046 through current-limiting resistor R1044, and also to pin 1 of Y1001 40MHz crystal oscillator; pins 2 and 4 of Y1001 40MHz crystal oscillator are grounded; Bluetooth chip U1004's pin 20 communicates with the main controller's UART protocol via the UART5_CTSN network identifier through current-limiting resistor R1042; Bluetooth chip U1004's pin 21 communicates with the main controller's UART protocol via the UART5_RTSN network identifier through current-limiting resistor R1038; Bluetooth chip U1004's pin 22 communicates with the main controller's UART protocol via the UART5_RX_MO network identifier through current-limiting resistor R1036; Bluetooth chip U1004's pin 23 communicates with the main controller's UART protocol via the UART5_TX_M0 network identifier through current-limiting resistor R1034. The BT_VDDIO_1V8 power supply is filtered by capacitor C1038 and connected to pin 24 of Bluetooth chip U1004 to provide power to U1004's UARTGPIO. Pin 25 of Bluetooth chip U1004 is connected to signal integrity capacitor C1030, with the other end of capacitor C1030 connected to current-limiting resistor R1031, and communicates with the main controller's PCM protocol via the SAI2_SDO_MO network identifier. Pin 26 of Bluetooth chip U1004 is connected to current-limiting resistor R1030, with the other end of resistor R1030 connected to signal integrity capacitor C1030, and the other end of capacitor C1030 communicates with the main controller's PCM protocol via the SAI2_SDI_MO network identifier. Pin 27 of Bluetooth chip U1004 communicates with the main controller via the PCM protocol through signal integrity capacitor C1031, with the other end of capacitor C1031 connected to current-limiting resistor R1029 and the SAI2_LRCK_MO network identifier. Pin 28 of Bluetooth chip U1004 communicates with the main controller via the PCM protocol through signal integrity capacitor C1032, with the other end of capacitor C1032 connected to current-limiting resistor R1028 and the SAI2_SCLK_MO network identifier. Pin 29 of Bluetooth chip U1004 is connected to test point TP1010 for chip testing; the BT_3V3 power supply, after passing through filter capacitor C1028, is connected to pin 30 of Bluetooth chip U1004, providing 3.3V power to Bluetooth chip U1004; the BT_1V2 power supply, after passing through filter capacitor C1027, is connected to pin 31 of Bluetooth chip U1004, providing 1.2V power to Bluetooth chip U1004; pin 32 of Bluetooth chip U1004, the internal power manager, outputs 1.2V power, which, after passing through filter capacitors C1036 and C1035, is connected to one end of current-limiting resistor L1003, the other end of L1003 is connected to the BT_1V2 network identifier, and the other ends of capacitors C1035 and C1036 are grounded; pin 33 of Bluetooth chip U1004 is grounded.

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