Dual bluetooth broadcast low power consumption gateway

Abstract

The utility model provides a kind of double bluetooth broadcast low-power consumption gateway, comprising: power supply;Bluetooth module is used to send first bluetooth broadcast and second bluetooth broadcast, wherein first bluetooth broadcast is used to interact with sub-device, and second bluetooth broadcast is used to interact with mobile device carried by user;Flash module is connected with bluetooth module;Wireless communication module is connected with bluetooth module;Power conversion module, the input end of power conversion module is connected with power supply, the first output end of power conversion module is connected with bluetooth module, the second output end of power conversion module is connected with flash module, the third output end of power conversion module is connected with wireless communication module.In the case of sub-device cannot be directly connected to network etc., bluetooth module is interacted with mobile device carried by user through second bluetooth broadcast while keeping first bluetooth broadcast and sub-device interaction, so that user can control sub-device remotely through mobile device, meet the remote use demand of user, improve the use experience of user.

Description

Technical Field

[0001] This utility model belongs to the field of gateway technology, and specifically relates to a dual Bluetooth broadcast low-power gateway. Background Technology

[0002] Currently, when a sub-device cannot directly connect to the network, the remote control link between the user's mobile device and the sub-device will be interrupted, preventing the user from remotely controlling the sub-device through the mobile device, failing to meet the user's remote use needs, and reducing the user experience. Utility Model Content

[0003] To address the aforementioned issues, the primary objective of this invention is to provide a dual Bluetooth broadcast low-power gateway to resolve these dual technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model provides a dual Bluetooth broadcast low-power gateway, comprising:

[0006] power supply;

[0007] The Bluetooth module is used to send a first Bluetooth broadcast and a second Bluetooth broadcast, wherein the first Bluetooth broadcast is used to interact with the sub-device and the second Bluetooth broadcast is used to interact with the mobile device carried by the user.

[0008] Flash memory module, connected to Bluetooth module;

[0009] The wireless communication module connects to the Bluetooth module.

[0010] The power conversion module has an input terminal connected to a power source, a first output terminal connected to a Bluetooth module, a second output terminal connected to a flash memory module, and a third output terminal connected to a wireless communication module.

[0011] Compared with the prior art, the beneficial effects of this application are as follows: When the sub-device cannot directly connect to the network, the Bluetooth module maintains the interaction with the sub-device through the first Bluetooth broadcast and interacts with the user's mobile device through the second Bluetooth broadcast, so that the user can remotely control the sub-device through the mobile device, meet the user's remote use needs, and improve the user experience.

[0012] In one work scenario, the sub-device is a door lock. When the network is interrupted, the user activates the "Near Field Bluetooth Door Opening" emergency function through an application installed on their mobile phone. After activation, the gateway maintains a first Bluetooth broadcast and a second Bluetooth broadcast simultaneously. The first Bluetooth broadcast is used to communicate with the door lock and send signals to interact with the door lock; the second Bluetooth broadcast is used to communicate with the mobile phone in an emergency and send signals containing an emergency identifier.

[0013] The transmission rules for the first and second Bluetooth broadcasts are as follows: if the Bluetooth module supports the parallel transmission of the first and second Bluetooth broadcasts, then the first and second Bluetooth broadcasts are transmitted simultaneously; if the parallel transmission of the first and second Bluetooth broadcasts is not supported, then the first Bluetooth broadcast is transmitted first, and the second Bluetooth broadcast is inserted once every 500ms.

[0014] The dynamic switching mechanism between the first and second Bluetooth broadcasts is as follows: when the gateway remains connected to the door lock, the Bluetooth module continuously sends both the first and second Bluetooth broadcasts; when the connection between the gateway and the door lock is interrupted, the Bluetooth module immediately stops sending the second Bluetooth broadcast and only sends the first Bluetooth broadcast to attempt to reconnect to the door lock. After a successful reconnection, the Bluetooth module resumes sending the second Bluetooth broadcast.

[0015] Furthermore, the Bluetooth module includes an nRF52840-QIAA Bluetooth Low Energy chip and a Bluetooth antenna. The nRF52840-QIAA Bluetooth Low Energy chip has a VDD pin connected to the first output terminal of the power conversion module. The nRF52840-QIAA Bluetooth Low Energy chip has an ANT pin connected to the Bluetooth antenna through an inductor L3. One end of the inductor L3 is grounded through a capacitor C16, and the other end of the inductor L3 is grounded through a capacitor C17 and a capacitor C18.

[0016] The nRF52840-QIAA is a multi-protocol chip with full protocol concurrency capabilities. It supports Bluetooth Low Energy, Bluetooth Mesh, Thread, Zigbee, 802.15.4, ANT, and a proprietary 2.4GHz protocol stack.

[0017] Preferably, the Bluetooth Low Energy chip can be a Nordic 52840 chip. The Nordic 52840 only supports single-channel broadcasting, and a time-division multiplexing mechanism needs to be designed when sending the first Bluetooth broadcast and the second Bluetooth broadcast.

[0018] Preferably, the Bluetooth Low Energy chip can be the ESP32-C3 development board, which adopts a PCB on-board antenna design, supports the IEEE 802.11 b / g / n wireless protocol and Bluetooth Low Energy 5.0 technology, and includes Bluetooth LE and Bluetooth Mesh communication standards.

[0019] In some implementations, the Bluetooth antenna can be the AT3216-B2R7HAA_ANT1. Specifically, the AT3216-B2R7HAA_ANT1 is a patch-type chip antenna suitable for Bluetooth and the 2.4GHz ISM band. Its main characteristics are as follows:

[0020] Operating frequency band: 2400MHz-2500MHz, covering Bluetooth (Bluetooth Classic, BLE) and 2.4GHz wireless communication scenarios.

[0021] Electrical performance: impedance of 50 ohms (matches most wireless module designs), gain of approximately 0.5dBi, average gain of -0.5dBi, suitable for short-range wireless communication needs.

[0022] Physical form: It adopts surface mount technology (SMD) packaging, which is a multi-layer chip antenna structure. It is small in size, saves PCB space, and is easy to integrate into small electronic devices.

[0023] Application scenarios: Commonly used in devices that require built-in Bluetooth functionality, such as smart home sensors, wearable devices, small IoT modules, wireless controllers, etc., especially suitable for product designs with strict space constraints.

[0024] The suffix "ANT1" usually represents a specific version or configuration of the model in the product series, which may be related to the production batch, performance fine-tuning, or adaptation scenarios. For specific details, please refer to the technical documents provided by the manufacturer.

[0025] Furthermore, the Bluetooth module also includes a Bluetooth input interface, which is a programming interface. The nRF52840-QIAA Bluetooth Low Energy chip has SWDCLK, SWDIO, and NRST pins. The Bluetooth input interface has a fifth pin connected to the first output of the power conversion module, a fourth pin connected to the SWDCLK pin, a third pin connected to the SWDIO pin, a second pin connected to the NRST pin, and a first pin grounded.

[0026] Furthermore, the wireless communication module includes an ESP32-C3-WROOM-02 chip, an nRF52840-QIAA Bluetooth Low Energy chip with a P0.06 pin as the RX terminal and a P0.08 pin as the TX terminal, an IO5 pin as the TX terminal and an IO6 pin as the RX terminal, a P0.06 pin of the nRF52840-QIAA Bluetooth Low Energy chip connected to the IO6 pin of the ESP32-C3-WROOM-02 chip via a resistor R4, and a P0.08 pin of the nRF52840-QIAA Bluetooth Low Energy chip connected to the IO7 pin of the ESP32-C3-WROOM-02 chip via a resistor R6.

[0027] In this context, RX is short for "receive" in communications, and TX is short for "transmit." Together, they form the transceiver unit of a wireless communication module. The RX, as the receiver, is responsible for signal reception; the TX, as the transmitter, is responsible for signal transmission. They typically work together to achieve bidirectional data transmission.

[0028] The ESP32-C3-WROOM-02 chip is a high-speed, low-latency WiFi connectivity chip designed specifically for IoT devices. It utilizes the ESP32-C3 processor and features high performance and low power consumption.

[0029] The ESP32-C3-WROOM-02 chip has a 3V3 pin that connects to the third output of the power conversion module. The third output of the power conversion module is connected to the IO6 pin through resistor R14, and the third output of the power conversion module is connected to the IO7 pin through resistor R15.

[0030] Furthermore, the wireless communication module also includes a wireless communication input interface. The nRF52840-QIAA Bluetooth Low Energy chip has a TXD pin and an RXD pin. The wireless communication input interface has a first pin connected to the TXD pin, a second pin connected to the RXD pin, and a third pin grounded.

[0031] Furthermore, the flash memory module includes a W25X80 flash memory. The nRF52840-QIAA Bluetooth Low Energy chip has pins P0.20, P0.21, P0.22, and P0.23. The W25X80 flash memory has an SDI pin connected to pin P0.20, an SDO pin connected to pin P0.21, a CS# pin connected to pin P0.22, an SCK pin connected to pin P0.23, a WP# pin connected to the second output terminal of the power conversion module, a VCC pin connected to the second output terminal of the power conversion module, and a HOLD# pin connected to the second output terminal of the power conversion module. The CS# pin of the W25X80 flash memory is connected to the second output terminal of the power conversion module via resistor R7.

[0032] In one work scenario, after the gateway verifies the integrity of the firmware, it writes the firmware to the flash memory.

[0033] Furthermore, the power conversion module includes an LM1117-33 voltage regulator. The LM1117-33 voltage regulator has an input terminal and an output terminal. The input terminal of the LM1117-33 voltage regulator is connected to the power supply and receives the power supply voltage. The output terminal of the LM1117-33 voltage regulator is connected to the first output terminal of the power conversion module through inductor B1, the second output terminal of the power conversion module, and the third output terminal of the power conversion module through inductor B3.

[0034] Furthermore, the dual Bluetooth broadcast low-power gateway also includes a button and an LED. The nRF52840-QIAA Bluetooth low-power chip has a P0.11 pin and a P0.13 pin. The button has a first end connected to the P0.11 pin. The second output terminal of the power conversion module is connected to the first end of the button through a resistor R8. The positive terminal of the LED is connected to the P0.13 pin through a resistor R11, and the negative terminal of the LED is grounded.

[0035] Furthermore, the dual Bluetooth broadcast low-power gateway also includes a buzzer and a transistor Q1. The buzzer has a first terminal and a second terminal. The nRF52840-QIAA Bluetooth low-power chip has a P0.27 pin. The base of the transistor is connected to the P0.27 pin through a resistor R9. The base of the transistor is grounded through a resistor R10. The collector of the transistor is connected to the second terminal of the buzzer. The emitter of the transistor is grounded. The first terminal of the buzzer is connected to the second output terminal of the power conversion module.

[0036] Compared with the prior art, the beneficial effects of this application are as follows: When the sub-device cannot directly connect to the network, the Bluetooth module maintains the interaction with the sub-device through the first Bluetooth broadcast and interacts with the user's mobile device through the second Bluetooth broadcast, so that the user can remotely control the sub-device through the mobile device, meet the user's remote use needs, and improve the user experience. Attached Figure Description

[0037] Figure 1 This is a circuit diagram of the nRF52840-QIAA Bluetooth Low Energy chip in this utility model.

[0038] Figure 2 This is a circuit diagram of the Bluetooth input interface in this utility model.

[0039] Figure 3 This is a circuit diagram of the wireless communication module in this utility model.

[0040] Figure 4 This is the circuit diagram of the W25X80 flash memory in this utility model.

[0041] Figure 5This is the circuit diagram of the LM1117-33 voltage regulator in this utility model.

[0042] Figure 6 This is the circuit diagram of the button in this utility model.

[0043] Figure 7 This is the circuit diagram of the light-emitting diode in this utility model.

[0044] Figure 8 This is the circuit diagram of the buzzer and transistor in this utility model.

[0045] In the diagram: U2, nRF52840-QIAA Bluetooth Low Energy chip; J1, Bluetooth input interface; U1, ESP32-C3-WROOM-02 chip; J2, wireless communication input interface; U3, W25X80 flash memory; U4, LM1117-33 voltage regulator; KEY1, button; D1, LED; Q1, transistor; BZ, buzzer; VDD_nRF, first output of the power conversion module; VDD_WIFI, third output of the power conversion module; VCC33, second output of the power conversion module. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0047] To achieve the above objectives, the technical solution of this utility model is as follows:

[0048] See Figures 1-8 As shown, this utility model provides a dual Bluetooth broadcast low-power gateway, comprising:

[0049] power supply;

[0050] The Bluetooth module is used to send a first Bluetooth broadcast and a second Bluetooth broadcast, wherein the first Bluetooth broadcast is used to interact with the sub-device and the second Bluetooth broadcast is used to interact with the mobile device carried by the user.

[0051] Flash memory module, connected to Bluetooth module;

[0052] The wireless communication module connects to the Bluetooth module.

[0053] The power conversion module has an input terminal connected to a power supply, a first output terminal VDD_nRF connected to a Bluetooth module, a second output terminal VCC33 connected to a flash memory module, and a third output terminal VDD_WIFI connected to a wireless communication module.

[0054] Compared with the prior art, the beneficial effects of this application are as follows: When the sub-device cannot directly connect to the network, the Bluetooth module maintains the interaction with the sub-device through the first Bluetooth broadcast and interacts with the user's mobile device through the second Bluetooth broadcast, so that the user can remotely control the sub-device through the mobile device, meet the user's remote use needs, and improve the user experience.

[0055] In one work scenario, the sub-device is a door lock. When the network is interrupted, the user activates the "Near Field Bluetooth Door Opening" emergency function through an application installed on their mobile phone. After activation, the gateway maintains a first Bluetooth broadcast and a second Bluetooth broadcast simultaneously. The first Bluetooth broadcast is used to communicate with the door lock and send signals to interact with the door lock; the second Bluetooth broadcast is used to communicate with the mobile phone in an emergency and send signals containing an emergency identifier.

[0056] The transmission rules for the first and second Bluetooth broadcasts are as follows: if the Bluetooth module supports the parallel transmission of the first and second Bluetooth broadcasts, then the first and second Bluetooth broadcasts are transmitted simultaneously; if the parallel transmission of the first and second Bluetooth broadcasts is not supported, then the first Bluetooth broadcast is transmitted first, and the second Bluetooth broadcast is inserted once every 500ms.

[0057] The dynamic switching mechanism between the first and second Bluetooth broadcasts is as follows: when the gateway remains connected to the door lock, the Bluetooth module continuously sends both the first and second Bluetooth broadcasts; when the connection between the gateway and the door lock is interrupted, the Bluetooth module immediately stops sending the second Bluetooth broadcast and only sends the first Bluetooth broadcast to attempt to reconnect to the door lock. After a successful reconnection, the Bluetooth module resumes sending the second Bluetooth broadcast.

[0058] In this embodiment, the Bluetooth module includes an nRF52840-QIAA Bluetooth Low Energy chip U2 and a Bluetooth antenna. The nRF52840-QIAA Bluetooth Low Energy chip U2 has a VDD pin connected to the first output terminal VDD_nRF of the power conversion module. The nRF52840-QIAA Bluetooth Low Energy chip U2 has an ANT pin connected to the Bluetooth antenna through an inductor L3. One end of the inductor L3 is grounded through a capacitor C16, and the other end of the inductor L3 is grounded through a capacitor C17 and a capacitor C18.

[0059] The nRF52840-QIAA is a multi-protocol chip with full protocol concurrency capabilities. It supports Bluetooth Low Energy, Bluetooth Mesh, Thread, Zigbee, 802.15.4, ANT, and a proprietary 2.4GHz protocol stack.

[0060] Preferably, the Bluetooth Low Energy chip can be a Nordic 52840 chip. The Nordic 52840 only supports single-channel broadcasting, and a time-division multiplexing mechanism needs to be designed when sending the first Bluetooth broadcast and the second Bluetooth broadcast.

[0061] Preferably, the Bluetooth Low Energy chip can be the ESP32-C3 development board, which adopts a PCB on-board antenna design, supports the IEEE 802.11 b / g / n wireless protocol and Bluetooth Low Energy 5.0 technology, and includes Bluetooth LE and Bluetooth Mesh communication standards.

[0062] In some implementations, the Bluetooth antenna can be the AT3216-B2R7HAA_ANT1. Specifically, the AT3216-B2R7HAA_ANT1 is a patch-type chip antenna suitable for Bluetooth and the 2.4GHz ISM band. Its main characteristics are as follows:

[0063] Operating frequency band: 2400MHz-2500MHz, covering Bluetooth (Bluetooth Classic, BLE) and 2.4GHz wireless communication scenarios.

[0064] Electrical performance: impedance of 50 ohms (matches most wireless module designs), gain of approximately 0.5dBi, average gain of -0.5dBi, suitable for short-range wireless communication needs.

[0065] Physical form: It adopts surface mount technology (SMD) packaging, which is a multi-layer chip antenna structure. It is small in size, saves PCB space, and is easy to integrate into small electronic devices.

[0066] Application scenarios: Commonly used in devices that require built-in Bluetooth functionality, such as smart home sensors, wearable devices, small IoT modules, wireless controllers, etc., especially suitable for product designs with strict space constraints.

[0067] The suffix "ANT1" usually represents a specific version or configuration of the model in the product series, which may be related to the production batch, performance fine-tuning, or adaptation scenarios. For specific details, please refer to the technical documents provided by the manufacturer.

[0068] In this embodiment, the Bluetooth module further includes a Bluetooth input interface J1, which is a programming interface. The nRF52840-QIAA Bluetooth Low Energy chip U2 has an SWDCLK pin, an SWDIO pin, and an NRST pin. The Bluetooth input interface J1 has a fifth pin connected to the first output terminal VDD_nRF of the power conversion module, a fourth pin connected to the SWDCLK pin, a third pin connected to the SWDIO pin, a second pin connected to the NRST pin, and a first pin grounded.

[0069] In this embodiment, the wireless communication module includes an ESP32-C3-WROOM-02 chip U1 and an nRF52840-QIAA Bluetooth Low Energy chip U2, which has a P0.06 pin as the RX terminal and a P0.08 pin as the TX terminal. The ESP32-C3-WROOM-02 chip U1 has an IO5 pin as the TX terminal and an IO6 pin as the RX terminal. The P0.06 pin of the nRF52840-QIAA Bluetooth Low Energy chip U2 is connected to the IO6 pin of the ESP32-C3-WROOM-02 chip U1 through a resistor R4. The P0.08 pin of the nRF52840-QIAA Bluetooth Low Energy chip U2 is connected to the IO7 pin of the ESP32-C3-WROOM-02 chip U1 through a resistor R6.

[0070] In this context, RX is short for "receive" in communications, and TX is short for "transmit." Together, they form the transceiver unit of a wireless communication module. The RX, as the receiver, is responsible for signal reception; the TX, as the transmitter, is responsible for signal transmission. They typically work together to achieve bidirectional data transmission.

[0071] Among them, the ESP32-C3-WROOM-02 chip U1 is a high-speed, low-latency WiFi connectivity chip designed specifically for IoT devices. It uses the ESP32-C3 processor and features high performance and low power consumption.

[0072] The ESP32-C3-WROOM-02 chip U1 has a 3V3 pin that connects to the third output terminal VDD_WIFI of the power conversion module. The third output terminal VDD_WIFI of the power conversion module is connected to the IO6 pin through resistor R14, and the third output terminal VDD_WIFI of the power conversion module is connected to the IO7 pin through resistor R15.

[0073] In this embodiment, the wireless communication module further includes a wireless communication input interface J2. The nRF52840-QIAA Bluetooth Low Energy chip U2 has a TXD pin and an RXD pin. The wireless communication input interface J2 has a first pin connected to the TXD pin, a second pin connected to the RXD pin, and a third pin grounded.

[0074] In this embodiment, the flash memory module includes a W25X80 flash memory U3, an nRF52840-QIAA Bluetooth Low Energy chip U2 with pins P0.20, P0.21, P0.22, and P0.23, a W25X80 flash memory U3 with an SDI pin connected to pin P0.20, an SDO pin connected to pin P0.21, and a CS# pin connected to pin P0.22. The W25X80 flash memory U3 has an SCK pin connected to the P0.23 pin, a WP# pin connected to the second output terminal VCC33 of the power conversion module, a VCC pin connected to the second output terminal VCC33 of the power conversion module, a HOLD# pin connected to the second output terminal VCC33 of the power conversion module, and a CS# pin connected to the second output terminal VCC33 of the power conversion module via resistor R7.

[0075] In one work scenario, after the gateway verifies the integrity of the firmware, it writes the firmware to the flash memory.

[0076] In this embodiment, the power conversion module includes an LM1117-33 voltage regulator U4. The LM1117-33 voltage regulator U4 has an input terminal and an output terminal. The input terminal of the LM1117-33 voltage regulator U4 is connected to the power supply and receives the power supply voltage. The output terminal of the LM1117-33 voltage regulator U4 is connected to the first output terminal VDD_nRF of the power conversion module through an inductor B1. The output terminal of the LM1117-33 voltage regulator U4 is connected to the second output terminal VCC33 of the power conversion module. The output terminal of the LM1117-33 voltage regulator U4 is connected to the third output terminal VDD_WIFI of the power conversion module through an inductor B3.

[0077] In this embodiment, the dual Bluetooth broadcast low-power gateway also includes a button KEY1 and an LED D1. The nRF52840-QIAA Bluetooth low-power chip U2 has a P0.11 pin and a P0.13 pin. The button KEY1 has a first end connected to the P0.11 pin. The second output terminal VCC33 of the power conversion module is connected to the first end of the button KEY1 through a resistor R8. The positive terminal of the LED D1 is connected to the P0.13 pin through a resistor R11, and the negative terminal of the LED D1 is grounded.

[0078] In this embodiment, the dual Bluetooth broadcast low-power gateway also includes a buzzer BZ and transistors Q1Q1. The buzzer BZ has a first terminal and a second terminal. The nRF52840-QIAA Bluetooth low-power chip U2 has a P0.27 pin. The base of transistor Q1 is connected to the P0.27 pin through resistor R9. The base of transistor Q1 is grounded through resistor R10. The collector of transistor Q1 is connected to the second terminal of buzzer BZ. The emitter of transistor Q1 is grounded. The first terminal of buzzer BZ is connected to the second output terminal VCC33 of the power conversion module.

[0079] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual Bluetooth broadcast low-power gateway, characterized in that, include: power supply; The Bluetooth module is used to send a first Bluetooth broadcast and a second Bluetooth broadcast, wherein the first Bluetooth broadcast is used to interact with the sub-device and the second Bluetooth broadcast is used to interact with the mobile device carried by the user. Flash memory module, connected to Bluetooth module; The wireless communication module connects to the Bluetooth module. The power conversion module has an input terminal connected to a power source, a first output terminal connected to a Bluetooth module, a second output terminal connected to a flash memory module, and a third output terminal connected to a wireless communication module.

2. The dual Bluetooth broadcast low-power gateway according to claim 1, characterized in that, The Bluetooth module includes an nRF52840-QIAA Bluetooth Low Energy chip and a Bluetooth antenna. The nRF52840-QIAA Bluetooth Low Energy chip has a VDD pin connected to the first output terminal of the power conversion module. The nRF52840-QIAA Bluetooth Low Energy chip has an ANT pin connected to the Bluetooth antenna through an inductor L3. One end of the inductor L3 is grounded through a capacitor C16, and the other end of the inductor L3 is grounded through a capacitor C17 and a capacitor C18.

3. The dual Bluetooth broadcast low-power gateway according to claim 2, characterized in that, The Bluetooth module also includes a Bluetooth input interface. The nRF52840-QIAA Bluetooth Low Energy chip has an SWDCLK pin, an SWDIO pin, and an NRST pin. The Bluetooth input interface has a fifth pin connected to the first output terminal of the power conversion module, a fourth pin connected to the SWDCLK pin, a third pin connected to the SWDIO pin, a second pin connected to the NRST pin, and a first pin grounded.

4. The dual Bluetooth broadcast low-power gateway according to claim 2, characterized in that, The wireless communication module includes an ESP32-C3-WROOM-02 chip. The nRF52840-QIAA Bluetooth Low Energy chip has a P0.06 pin (RX terminal) and a P0.08 pin (TX terminal). The ESP32-C3-WROOM-02 chip has an IO6 pin (TX terminal) and an IO7 pin (RX terminal). The P0.06 pin of the nRF52840-QIAA Bluetooth Low Energy chip is connected to the IO6 pin of the ESP32-C3-WROOM-02 chip via resistor R4. The P0.08 pin of the nRF52840-QIAA Bluetooth Low Energy chip is connected to the IO7 pin of the ESP32-C3-WROOM-02 chip via resistor R6. The ESP32-C3-WROOM-02 chip has a 3V3 pin connected to the third output terminal of the power conversion module. The third output terminal of the power conversion module is connected to the IO6 pin via resistor R14, and the third output terminal of the power conversion module is connected to the IO7 pin via resistor R15.

5. The dual Bluetooth broadcast low-power gateway according to claim 4, characterized in that, The wireless communication module also includes a wireless communication input interface. The nRF52840-QIAA Bluetooth Low Energy chip has a TXD pin and an RXD pin. The wireless communication input interface has a first pin connected to the TXD pin, a second pin connected to the RXD pin, and a third pin grounded.

6. The dual Bluetooth broadcast low-power gateway according to claim 2, characterized in that, The flash memory module includes a W25X80 flash memory chip. The nRF52840-QIAA Bluetooth Low Energy chip has pins P0.20, P0.21, P0.22, and P0.

23. The W25X80 flash memory has an SDI pin connected to pin P0.20, an SDO pin connected to pin P0.21, a CS# pin connected to pin P0.22, an SCK pin connected to pin P0.23, a WP# pin connected to the second output terminal of the power conversion module, a VCC pin connected to the second output terminal of the power conversion module, and a HOLD# pin connected to the second output terminal of the power conversion module. The CS# pin of the W25X80 flash memory is connected to the second output terminal of the power conversion module via resistor R7.

7. The dual Bluetooth broadcast low-power gateway according to claim 2, characterized in that, The power conversion module includes an LM1117-33 voltage regulator. The LM1117-33 voltage regulator has an input terminal and an output terminal. The input terminal of the LM1117-33 voltage regulator is connected to the power supply and receives the power supply voltage. The output terminal of the LM1117-33 voltage regulator is connected to the first output terminal of the power conversion module through inductor B1, the second output terminal of the power conversion module, and the third output terminal of the power conversion module through inductor B3.

8. The dual Bluetooth broadcast low-power gateway according to claim 2, characterized in that, The dual Bluetooth broadcast low-power gateway also includes a button and an LED. The nRF52840-QIAA Bluetooth low-power chip has a P0.11 pin and a P0.13 pin. The button has a first end connected to the P0.11 pin. The second output terminal of the power conversion module is connected to the first end of the button through a resistor R8. The positive terminal of the LED is connected to the P0.13 pin through a resistor R11, and the negative terminal of the LED is grounded.

9. The dual Bluetooth broadcast low-power gateway according to claim 2, characterized in that, The dual Bluetooth broadcast low-power gateway also includes a buzzer and a transistor Q1. The buzzer has a first terminal and a second terminal. The nRF52840-QIAA Bluetooth low-power chip has a P0.27 pin. The base of the transistor is connected to the P0.27 pin through a resistor R9. The base of the transistor is grounded through a resistor R10. The collector of the transistor is connected to the second terminal of the buzzer. The emitter of the transistor is grounded. The first terminal of the buzzer is connected to the second output terminal of the power conversion module.

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