High-safety remote control device based on low-power-consumption Bluetooth technology

Abstract

The utility model relates to a high-safety remote control device based on a low-power-consumption Bluetooth technology, aiming at solving the technical problems that the existing similar remote control device is poor in safety and relatively high in power consumption, and the Bluetooth is connected by irrelevant equipment. The high-safety remote control device comprises a Bluetooth remote controller and a Bluetooth controlled device, the Bluetooth remote controller remotely controls the Bluetooth controlled device through a Bluetooth wireless signal, and the Bluetooth controlled device is a command execution component; the key point is that the Bluetooth remote controller comprises a low-power-consumption Bluetooth MCU, a Bluetooth antenna, a key, an acousto-optic prompt circuit, a protection circuit and a battery, when the Bluetooth remote controller is in deep dormancy at ordinary times or a power supply is turned off, the Bluetooth remote controller is awakened or powered on through the low-power-consumption Bluetooth MCU, after awakening, a key value pressed by the key is detected to enter a registration or remote control mode, and the Bluetooth remote controller is powered off. Bluetooth information is transmitted and received through a Bluetooth antenna, and after registration or remote control is completed, a deep sleep mode is entered or a power supply is turned off; the Bluetooth controlled device is in a dormant state at ordinary times and works after pairing.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic remote control devices, in particular to a high-security remote control device based on low-power Bluetooth technology. Background Art

[0002] Currently, remote control keys and locks used in scenarios like remote garage door controls generally use ordinary radio frequency chips, which have poor security and privacy and are easily cracked. In the field of smart home appliances, low-power Bluetooth remote control devices have become widely used. In order to enable Bluetooth remote control devices to respond quickly, the home appliance is generally used as the Bluetooth master device to scan the Bluetooth broadcast information of the remote control. In this way, the confidentiality of communication between remote control devices is also low. For example, the application number 201921271501.8 disclosed in the Chinese patent literature, the authorization announcement date is 2020.02.14, and the utility model name is "Low-power Bluetooth remote control circuit"; however, because the controlled Bluetooth device is in scanning mode, the power consumption is relatively high, so it is not suitable for application scenarios where the controlled Bluetooth device is battery-powered. Low-power Bluetooth technology refers to a personal area network technology designed and sold by the Bluetooth Technology Alliance, intended for emerging applications in healthcare, sports and fitness, beacons, security, home entertainment and other fields. Compared with classic Bluetooth, low-power Bluetooth aims to significantly reduce power consumption and cost while maintaining the same communication range. Bluetooth Low Energy (BLE) is not backwards compatible with the original Bluetooth protocol. It uses the same 2.4GHz radio frequency as Classic Bluetooth, allowing dual-mode devices to share the same antenna and employ a simpler modulation system. Some existing Bluetooth remote control devices use password pairing to securely communicate between devices. However, Bluetooth devices must be connected before entering a password, so unauthorized devices may attempt to connect, affecting the real-time remote control. Summary of the Invention

[0003] To overcome these shortcomings, the present invention aims to provide a highly secure remote control device based on Bluetooth low energy technology. This device primarily addresses the technical issues of existing remote control devices, such as poor security, high power consumption, and the possibility of Bluetooth connections being made by unrelated devices. This objective is achieved through the following technical solutions.

[0004] A high-security remote control device based on low-power Bluetooth technology, the high-security remote control device includes a Bluetooth remote controller and a Bluetooth controlled device. The Bluetooth remote controller remotely controls the Bluetooth controlled device via Bluetooth wireless signals, and the Bluetooth controlled device is a command execution component; the characteristic is that the Bluetooth remote controller includes a low-power Bluetooth MCU, a Bluetooth antenna, a button, an audio-visual prompt circuit, a protection circuit, and a battery. When the Bluetooth remote controller is in deep sleep or the power is turned off, the Bluetooth remote controller is awakened or powered on by the low-power Bluetooth MCU, driving the audio-visual prompt circuit to prompt the working status. The battery adopts a disposable button battery. After the low-power Bluetooth MCU wakes up, it detects the key value pressed to enter the registration or remote control mode, transmits and receives Bluetooth information through the Bluetooth antenna, and the registration or remote control is completed. After the pairing switch is in the registered pairing state, the Bluetooth remote control sends a registration pairing request and enters the registration process; the pairing switch is in the non-registered pairing state, the Bluetooth remote control sends a remote control request and enters the remote control process. After the remote control is successful, the actuator is driven and the input and output interface is managed. The power supply of the Bluetooth controlled device adopts an external adapter power supply or a built-in battery, and the voltage stabilization protection circuit plays a role in voltage stabilization and overvoltage and overcurrent protection. Therefore, the above-mentioned Bluetooth remote control registers and remotely controls the Bluetooth controlled device through Bluetooth wireless signals. After the low-power Bluetooth MCU in the Bluetooth remote control wakes up, it detects the key value pressed and enters the registration or remote control mode, transmits and receives Bluetooth information through the Bluetooth antenna, and enters the deep sleep mode after the registration or remote control is completed; the low-power Bluetooth MCU of the Bluetooth controlled device is usually in a sleep state, and the Bluetooth name information is broadcasted through the Bluetooth antenna at intervals. When the pairing switch is in the registered pairing state and the Bluetooth remote control sends a registration pairing request, it enters the registration process. When the pairing switch is in the non-registered pairing state and the Bluetooth remote control sends a remote control request, it enters the remote control process. The remote control successfully drives the actuator and manages the input and output interface.

[0005] Specifically, the Bluetooth remote control's low-power MCU is connected to the buttons and audio and video prompt circuits via GPIO interfaces. The Bluetooth remote control's protection circuit is connected to the Bluetooth low-power MCU via wiring, and the protection circuit is also connected to the battery via wiring. The Bluetooth low-power MCU of the Bluetooth controlled device is connected to the pairing switch and input / output interfaces via GPIO interfaces. The actuator and voltage stabilization protection circuit of the Bluetooth controlled device are also connected to the Bluetooth low-power MCU via wiring, and the voltage stabilization protection circuit is also connected to the battery via wiring.

[0006] The utility model has a simple structural design, high security, simple registration, quick remote control and extremely low power consumption. It is suitable as a high-security remote control device based on low-power Bluetooth technology, as well as a structural improvement of similar products. It is particularly suitable for application scenarios where both the remote control and the controlled device need to be battery-powered. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the working principle structure of the utility model.

[0008] Figure 2 yes Figure 1 A block diagram of the registration process.

[0009] Figure 3 yes Figure 1 Remote control process block diagram. DETAILED DESCRIPTION

[0010] The structure and use of the present invention will now be further described with reference to the accompanying drawings. As shown in Figures 1-3 , the numbers in the drawings represent specific functional modules. Well-known components and processes are not described in the embodiments to avoid unnecessary limitations on the present invention. Furthermore, to simplify the drawings, some well-known and commonly used elements are depicted in simplified schematic form.

[0011] The functional principle of the remote control device is as follows Figure 1As shown, the high-security remote control device includes a Bluetooth remote controller K1 and a Bluetooth controlled device L1. The Bluetooth remote controller K1 remotely controls the Bluetooth controlled device L1 through a Bluetooth wireless signal. The Bluetooth controlled device L1 is a command execution component. The Bluetooth remote controller K1 is characterized in that it includes a low-power Bluetooth MCU D1, a Bluetooth antenna D6, a button D2, an audio-visual prompt circuit D3, a protection circuit D5, and a battery D4. When the Bluetooth remote controller K1 is in deep sleep or the power is turned off, the Bluetooth remote controller K1 is awakened or powered on by the low-power Bluetooth MCU D1, driving the audio-visual prompt circuit D3 to prompt the working status. The protection circuit D5 prevents the battery D4 from being reversely connected. The battery D4 is a disposable button battery. After waking up, the low-power Bluetooth MCU D1 detects the key value pressed by the button D2 to enter the registration or remote control mode, transmits and receives Bluetooth information through the Bluetooth antenna D6, and enters the deep sleep mode or power is turned off after the registration or remote control is completed. The Bluetooth controlled device L1 includes a low-power Bluetooth MCU C1, Bluetooth antenna C7, pairing switch C2, actuator C3, voltage stabilization protection circuit C5, input and output interface C6, battery C4. Normally, when the low-power Bluetooth MCU C1 is in sleep mode, the Bluetooth controlled device L1 broadcasts Bluetooth name information through the Bluetooth antenna C7 at intervals to wait for registration and pairing; when the pairing switch C2 is in the registration pairing state, the Bluetooth remote control K1 sends a registration pairing request and enters the registration process; when the pairing switch C2 is in the non-registration pairing state, the Bluetooth remote control K1 sends a remote control request and enters the remote control process. After the remote control is successful, the actuator C3 and the input and output interface C6 are driven. The power supply C4 of the Bluetooth controlled device L1 adopts an external adapter power supply or a built-in battery C4. The voltage stabilization protection circuit C5 plays a role in voltage stabilization and overvoltage and overcurrent protection.

[0012] At the same time, before the above-mentioned Bluetooth remote control K1 remotely controls the Bluetooth controlled device L1, it is necessary to register and pair with each other, obtain the other party's device information, generate and save the Bluetooth whitelist and communication key; when the Bluetooth remote control K1 remotely controls the Bluetooth controlled device L1, it uses the Bluetooth whitelist method to scan and connect to the Bluetooth controlled device L1. After the connection, the data is encrypting by the communication key saved during registration. After the Bluetooth controlled device L1 decrypts and authenticates, it executes the instruction and returns the execution result.

[0013] Before the above-mentioned Bluetooth remote control controls the Bluetooth controlled device, it is necessary to register and pair with each other, obtain the other party's device information, generate and save the Bluetooth whitelist and communication key, and the description also includes: the Bluetooth controlled device and the Bluetooth remote control each enter the registration mode through the pairing button; the Bluetooth controlled device broadcasts a dedicated Bluetooth name, and the Bluetooth remote control scans for Bluetooth controlled devices with a specific Bluetooth name and RSSI Bluetooth signal that meets the requirements, and initiates a connection request; after the connection is successful, a registration command is sent, a communication key is negotiated, and the other party's device information is obtained as a Bluetooth whitelist; after successful registration, the communication key and whitelist information are saved in their respective non-volatile data storage spaces; when sending and receiving pairing communication data, the encryption key uses the synchronization key saved at the factory, and the return packet is encrypted using the negotiated communication key; a communication key with extremely low duplication between devices is generated through negotiation of the random numbers, unique serial numbers of the devices, and session passwords of both parties; after re-pairing, the communication key changes randomly.

[0014] When the Bluetooth remote control remotely controls a Bluetooth controlled device, it scans and connects to the Bluetooth controlled device in a Bluetooth whitelist manner. After the connection is made, the remote control communication data is encrypted using the communication key saved during registration and the controlled device is remotely controlled. The method further comprises: when the Bluetooth remote control remote control remotely controls the device, it scans and connects to the Bluetooth controlled device according to the saved Bluetooth whitelist; after the Bluetooth remote control remote control successfully connects to the Bluetooth controlled device, it sends a remote control communication instruction encrypted with the communication key; the communication key is the communication key saved in the Bluetooth remote control and the Bluetooth controlled device after registration and pairing negotiation; the remote control communication instruction before encryption contains a random number, and each communication frame is randomly changed; the Bluetooth controlled device executes the instruction after decryption and authentication and returns the execution result.

[0015] The pairing process of the high-security remote control device is as follows: Figure 2As shown, the Bluetooth controlled device L1 broadcasts the Bluetooth name at intervals, and presses the pairing button to enter the pairing mode; the Bluetooth remote control K1 presses the pairing button to wake up, scans for the Bluetooth controlled device L1 with a specific Bluetooth name and a Bluetooth signal strength RSSI that meets the requirements, and sends a Bluetooth connection request; after the Bluetooth connection is successful, the Bluetooth remote control K1 generates a pairing command according to the communication protocol and sends a write pairing command; after the Bluetooth controlled device L1 successfully decrypts and authenticates through the synchronization key, it saves the Bluetooth remote control K1 information and the communication key generated by the rule to the memory; after receiving the write success event, the Bluetooth remote control K1 sends a read command to read the pairing command reply packet encrypted with the communication key, the Bluetooth remote control K1 generates the communication key according to the rule, decrypts and authenticates the pairing command reply packet through the communication key, and after successful authentication, saves the pairing information and communication key of the Bluetooth controlled device to the memory, the remote control device is successfully paired, and the pairing process ends. The communication protocol mentioned in the pairing process is the data communication frame format agreed upon by the Bluetooth remote control K1 and the Bluetooth controlled device L1 for mutual communication. The encryption keys include the factory-stored synchronization key and the communication key with an extremely low repetition rate generated during pairing. The communication key contains device information and random number information to ensure that the communication key is different for each pairing. After pairing, the communication key is saved in a non-volatile storage space for encrypted use during remote control. The encryption algorithm uses advanced encryption algorithms, such as AES128.

[0016] The remote control process of the high-security remote control device is as follows: Figure 3 As shown, the Bluetooth controlled device L1 is always broadcasting Bluetooth information at intervals even in low-power sleep mode; the Bluetooth remote control K1 is awakened by pressing the remote control button, and the Bluetooth controlled device L1 is scanned according to the device information in the white list. If it is a Bluetooth controlled device L1 in the white list, a Bluetooth connection request is initiated, and the Bluetooth controlled device L1 determines whether the Bluetooth remote control K1 is in the white list. If so, the connection is allowed, otherwise the connection is not allowed; after the Bluetooth connection is successful, the Bluetooth remote control K1 generates a remote control command encrypted by the communication key according to the communication protocol, and sends a write remote control command; after the Bluetooth controlled device L1 successfully decrypts and authenticates through the communication key, the Bluetooth controlled device L1 is operated; after receiving the write success event, the Bluetooth remote control K1 sends a read command to read the write remote control command reply packet encrypted by the communication key, and the Bluetooth remote control K1 decrypts and authenticates the write remote control command reply packet through the communication key. After the authentication is successful, the Bluetooth operation remote control K1 is successfully controlled, and the remote control device successfully controls the remote control, and the remote control process ends.

[0017] In summary, this Bluetooth remote control device is a highly secure device based on Bluetooth low-energy technology. The Bluetooth remote control K1 and Bluetooth controller L1 establish a Bluetooth whitelist and a communication key with a very low repetition rate through registration and pairing. This allows for rapid connection establishment during remote control, and communication data is encrypted using the communication key before being sent and received. This ensures highly secure detection and control between Bluetooth devices, preventing theft. This Bluetooth remote control device features simple registration, fast remote control, extremely low power consumption, and high security, making it particularly suitable for high-security applications requiring both the remote control and the controlled device to be battery-powered.

[0018] The above description of the disclosed implementation methods will enable those skilled in the art to implement or use the present invention. Various modifications to these implementation methods will be readily apparent to those skilled in the art, and the general principles defined in this specification may be implemented in other implementation methods without departing from the spirit or scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A high-security remote control device based on low-power Bluetooth technology, the high-security remote control device comprising a Bluetooth remote controller (K1) and a Bluetooth controlled device (L1), wherein the Bluetooth remote controller (K1) remotely controls the Bluetooth controlled device (L1) via a Bluetooth wireless signal, and the Bluetooth controlled device (L1) serves as a command execution component; The Bluetooth remote control (K1) includes a low-power Bluetooth MCU (D1), a Bluetooth antenna (D6), a button (D2), an audio-visual prompt circuit (D3), a protection circuit (D5), and a battery (D4). When the Bluetooth remote control (K1) is in deep sleep or the power is turned off, the Bluetooth remote control (K1) is awakened or powered on by the low-power Bluetooth MCU (D1), and drives the audio-visual prompt circuit (D3) to indicate the working status. The battery (D4) is a disposable button battery. After the low-power Bluetooth MCU (D1) is awakened, it detects the key value pressed by the button (D2) to enter the registration or remote control mode, and transmits and receives signals through the Bluetooth antenna (D6). Bluetooth information, enters deep sleep mode or power is turned off after registration or remote control is completed; the Bluetooth controlled device (L1) includes a low-power Bluetooth MCU (C1), a Bluetooth antenna (C7), a pairing switch (C2), an actuator (C3), a voltage stabilization protection circuit (C5), an input and output interface (C6), and a battery (C4). When the low-power Bluetooth MCU (C1) is in a sleep state, the Bluetooth controlled device (L1) broadcasts Bluetooth name information through the Bluetooth antenna (C7) at intervals to wait for registration and pairing; when the pairing switch (C2) is in a registration and pairing state, the Bluetooth remote control (K1) sends a registration and pairing request to enter the registration process; The pairing switch (C2) is in the non-registered pairing state, the Bluetooth remote controller (K1) sends a remote control request and enters the remote control process. After the remote control is successful, the actuator (C3) and the management input and output interface (C6) are driven. The power supply (C4) of the Bluetooth controlled device (L1) adopts an external adapter power supply or a built-in battery (C4).

2. The high-security remote control device based on low-power Bluetooth technology according to claim 1, characterized in that The low-power Bluetooth MCU (D1) of the Bluetooth remote controller (K1) is connected to the button (D2) and the sound and light prompt circuit (D3) through the GPIO interface respectively. The protection circuit (D5) of the Bluetooth remote controller (K1) is connected to the low-power Bluetooth MCU (D1) through a line, and the protection circuit (D5) is connected to the battery (D4) through a line.

3. The high-security remote control device based on low-power Bluetooth technology according to claim 1, characterized in that The low-power Bluetooth MCU (C1) of the Bluetooth controlled device (L1) is connected to the pairing switch (C2) and the input / output interface (C6) via the GPIO interface, respectively; the actuator (C3) and the voltage stabilizing protection circuit (C5) of the Bluetooth controlled device (L1) are connected to the low-power Bluetooth MCU (C1) via lines, respectively; and the voltage stabilizing protection circuit (C5) is connected to the battery (C4) via lines.

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