Bluetooth probe data acquisition and transmission device based on lora communication

Abstract

The utility model belongs to data acquisition technical field relates to a kind of bluetooth probe data acquisition transmission device based on lora communication, including MCU main control module, power module and Lora communication module;Power module is converted into 5VDC and 3.3VDC to MCU main control module and Lora communication module with 12VDC power supply, while power module management built-in lithium battery's charge-discharge;MCU main control module is connected with host computer by Lora communication module and communicates;MCU main control module is built-in bluetooth communication module.The utility model does not need wiring, and data is transmitted at long range between bluetooth probe and host computer through LoRa, and the system allows one layer routing relay, and probe compatible relay function forwards data, greatly simplifies deployment process;Bluetooth beacon cost is low, and the effective switching of external power supply and built-in battery can be realized.

Description

Technical Field

[0001] This utility model relates to the field of data acquisition technology, and in particular to a Bluetooth probe data acquisition and transmission device based on LoRa communication. Background Technology

[0002] With the rapid development of IoT technology, indoor positioning technology has become one of the key supporting technologies in fields such as smart cities, smart homes, industrial control, and construction management. Especially in building construction, the demand for positioning and monitoring of personnel and mobile devices is increasing. However, traditional positioning technologies such as GPS suffer from severe signal attenuation in indoor environments, failing to meet positioning requirements; GSM lacks coverage, making data transmission impossible; and Wi-Fi or ultra-wideband-based positioning systems suffer from high costs and complex deployment.

[0003] An indoor area positioning system based on Bluetooth probes and LoRa communication has emerged. This system combines the low cost and ease of deployment of Bluetooth probes with the long-range transmission advantages of LoRa communication, providing an efficient and economical solution for accurate positioning in complex indoor environments. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the background technology, such as "GPS signal attenuation is severe in indoor environments, which cannot meet the positioning requirements; GSM is not covered, which cannot realize data backhaul; and positioning systems based on Wi-Fi or ultra-wideband are costly and complex to deploy". To this end, a Bluetooth probe data acquisition and transmission device based on LoRa communication is provided.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A Bluetooth probe data acquisition and transmission device based on LoRa communication includes an MCU main control module, a power supply module, and a LoRa communication module; The power supply module converts 12VDC into 5VDC and 3.3VDC to supply power to the MCU main control module and LoRa communication module. At the same time, the power supply module manages the charging and discharging of the built-in lithium battery. The MCU main control module communicates with the host computer through the LoRa communication module; The MCU main control module has a built-in Bluetooth communication module, which is used to continuously scan the surrounding Bluetooth beacons, store the Bluetooth MAC addresses in the cache and remove duplicates.

[0006] The following is a further technical solution of this utility model: the Bluetooth communication module is equipped with multiple primary probes, each primary probe including multiple secondary probes. The host computer queries the primary probes in sequence through the LoRa communication module. The primary probe first sends back its own Bluetooth scanning data, and then the primary probe queries its own secondary probes in sequence. The data sent back by the secondary probes is forwarded to the host computer through the primary probes.

[0007] The following is a further defined technical solution of this utility model: the power supply module includes a 12-to-5V voltage conversion circuit, a battery charge and discharge management circuit, a switching circuit, and a 5-to-3.3V voltage conversion circuit. The output terminal of the 12-to-5V voltage conversion circuit is electrically connected to the built-in lithium battery through the battery charge and discharge management circuit. The output terminal of the battery charge and discharge management circuit supplies power to the MCU chip of the MCU main control module through the switching circuit. The 5-to-3.3V voltage conversion circuit is electrically connected to the voltage terminal of the MCU chip of the MCU main control module.

[0008] Compared with the prior art, the present invention has the following technical effects: Wireless communication and convenient deployment: No wiring is required. The Bluetooth probe transmits data to the host computer over long distances via LoRa. The system allows for one-layer routing relay, and the probe is compatible with relay functions to forward data, which greatly simplifies the deployment process. Low component cost and convenient power supply: Bluetooth beacons are low cost and can effectively switch between external power supply and built-in battery.

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a diagram showing the connection relationships between the device modules of this utility model; Figure 2 This is a circuit connection diagram of the MCU main control module in this utility model; Figure 3 This is a circuit connection diagram of the Lora communication module in this utility model; Figure 4 This is a circuit connection diagram of the 12V to 5V voltage conversion circuit in this utility model; Figure 5This is a circuit connection diagram of the battery charging and discharging management circuit in this utility model; Figure 6 This is a circuit connection diagram of the switching circuit in this utility model; Figure 7 This is a circuit connection diagram of the 5V to 3.3V voltage conversion circuit in this utility model; Figure 8 This is a schematic diagram of the probe arrangement of the Bluetooth communication module in this utility model. Detailed Implementation

[0012] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0013] like Figure 1-8 As shown, a Bluetooth probe data acquisition and transmission device based on LoRa communication is provided, mainly composed of three parts: an MCU main control module, a power supply module, and a LoRa communication module. The power supply module converts 12VDC to 5VDC and 3.3VDC to power the MCU main control module and the LoRa communication module, and also manages the charging and discharging of the built-in lithium battery; the MCU main control module communicates with the host computer through the LoRa communication module.

[0014] like Figure 1 and 2 As shown, the MCU main control module has a built-in Bluetooth communication module that supports the Bluetooth Low Energy (BLE) protocol, enabling seamless connection with Bluetooth devices such as smartphones and tablets for convenient data transmission and control. It continuously scans for surrounding Bluetooth beacons, storing Bluetooth MAC addresses in a buffer and deduplicating them. The MCU main control module uses the W806 series MCU chip. The W806 is a microcontroller (MCU) with integrated Bluetooth functionality, designed specifically for IoT applications. This MCU combines high-performance processing power, low-power design, and rich peripheral interfaces, providing developers with a flexible and reliable IoT device development platform. The W806 not only supports the standard Bluetooth protocol but also possesses powerful computing capabilities and abundant resources to meet the needs of various complex IoT applications. The MCU main control module also provides multiple peripheral interfaces, such as UART, SPI, I2C, and GPIO, facilitating connection and communication with various sensors, actuators, and other peripherals, enhancing the system's scalability and flexibility.

[0015] Bluetooth Beacon: A wireless device based on Bluetooth Low Energy (BLE) technology. It provides a location reference for probes by periodically broadcasting Bluetooth signals containing a unique ID and signal strength index (RSSI). A single beacon costs tens to hundreds of yuan, far less than Wi-Fi or UWB positioning devices, making it suitable for large-scale deployment. No wiring is required; communication is via Bluetooth signals, simplifying the deployment process and reducing construction complexity. Using BLE 5.0 and above, a single battery can last for several years (e.g., a CR2032 battery supports 2-5 years), reducing maintenance costs. The beacon's position can be adjusted at any time to adapt to changes in factory layout or temporary event needs.

[0016] like Figure 8 As shown, the Bluetooth communication module has multiple primary probes (relays), with a maximum capacity of 8 probes, numbered 1, 2, 3, 4, 5, 6, 7, and 8. In this embodiment, there are 3 primary probes. Each primary probe includes multiple secondary probes, meaning the maximum capacity of secondary probes under each relay is 8. The probes under relay 1 are numbered 1a, 1b, 1c, 1d, 1e, 1f, 1g, and 1h. In this embodiment, each relay has 3 secondary probes. The host computer queries the primary probes sequentially via the LoRa communication module. The primary probes first return their own Bluetooth scan data, then query their respective secondary probes sequentially. The data returned by the secondary probes is forwarded to the host computer via the primary probes. Finally, the host computer returns the data and probe numbers to the cloud platform, which contains the area information bound to each probe number.

[0017] like Figure 1 and 3 As shown, the LoRa (Long Range) communication module is a low-power wide-area network (LPWAN) communication protocol based on spread spectrum technology, developed and promoted by Semtech. It combines digital spread spectrum, digital signal processing, and forward error correction coding techniques to achieve long-distance, low-power, and interference-resistant wireless communication. LoRa technology is particularly suitable for IoT applications requiring long-distance transmission and relatively small data volumes, such as smart cities, environmental monitoring, agricultural automation, and industrial control. Utilizing LoRa spread spectrum technology, the LoRa communication module can achieve stable communication distances of several kilometers in complex environments, meeting the needs of long-distance data transmission.

[0018] like Figure 1 , 4 As shown in Figures 5, 6, and 7, the power supply module includes a 12V to 5V voltage conversion circuit, a battery charging and discharging management circuit, a switching circuit, and a 5V to 3.3V voltage conversion circuit. Among them, as shown in Figures 5, 6, and 7... Figure 4 As shown, the 12V to 5V voltage conversion circuit converts the external 12V power supply to 5V via DC / DC conversion, and then inputs the 5V (VC5) to the battery charge / discharge management circuit, as follows. Figure 5 As shown, the battery charge / discharge management circuit is electrically connected to the built-in lithium battery (external connection). The built-in lithium battery can power the various modules of the device even without an external 12V power supply. The battery charge / discharge management circuit can detect the voltage through the ADC2 terminal and transmit it to the MCU main control module, thereby controlling the operation of the chip U5 in the battery charge / discharge management circuit to realize the charge / discharge management of the lithium battery.

[0019] like Figure 1 and 6 As shown, the output of the battery charge / discharge management circuit supplies power to the MCU chip of the MCU main control module through a switching circuit. The 5V to 3.3V voltage conversion circuit is electrically connected to the voltage terminal of the MCU chip in the MCU main control module. The switching circuit is jointly controlled by the MCU main control module and the validity of the external power supply signal. The logic relationship is OR: when there is an external power supply signal, i.e., the external power supply is higher than 6.6V, the PA10 terminal (connected to the MCU main control module) outputs a high level, and the power supply is maintained; when it is lower than 5V, the PA10 terminal outputs a low level, and the power supply is turned off; or, the PA8 terminal of the MCU main control module is the power holding pin. When it is high, the power supply is maintained; when it is low, the power supply is turned off, thereby realizing the switching function of the switching circuit.

[0020] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A Bluetooth probe data acquisition and transmission device based on LoRa communication, characterized in that, Includes the MCU main control module, power supply module, and LoRa communication module; The power supply module converts 12VDC into 5VDC and 3.3VDC to supply power to the MCU main control module and LoRa communication module. At the same time, the power supply module manages the charging and discharging of the built-in lithium battery. The MCU main control module communicates with the host computer through the LoRa communication module; The MCU main control module has a built-in Bluetooth communication module, which is used to continuously scan the surrounding Bluetooth beacons, store the Bluetooth MAC addresses in the cache and remove duplicates.

2. The Bluetooth probe data acquisition and transmission device based on LoRa communication as described in claim 1, characterized in that, The Bluetooth communication module is equipped with multiple primary probes, each of which includes multiple secondary probes. The host computer queries the primary probes sequentially through the LoRa communication module. The primary probes first return their own Bluetooth scan data, and then the primary probes query their own secondary probes sequentially. The data returned by the secondary probes is forwarded to the host computer via the primary probes.

3. The Bluetooth probe data acquisition and transmission device based on LoRa communication as described in claim 1, characterized in that, The power supply module includes a 12-to-5V voltage conversion circuit, a battery charge / discharge management circuit, a switching circuit, and a 5-to-3.3V voltage conversion circuit. The output of the 12-to-5V voltage conversion circuit is electrically connected to the built-in lithium battery through the battery charge / discharge management circuit. The output of the battery charge / discharge management circuit supplies power to the MCU chip of the MCU main control module through the switching circuit. The 5-to-3.3V voltage conversion circuit is electrically connected to the voltage terminal of the MCU chip of the MCU main control module.

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