Serial port-to-Bluetooth communication device for electromagnetic water meter

Abstract

The utility model relates to a serial port-to-Bluetooth communication device for an electromagnetic water meter, which comprises a USB-A interface, a USB-to-serial port chip, a TTL (transistor-transistor logic) serial port, a power supply module, a power supply color indicating lamp, a communication color indicating lamp, a low-power-consumption BLE (Bluetooth Low Energy) Bluetooth chip, a Bluetooth connection color indicating lamp and a connector interface, and is characterized in that a notebook computer is connected with the USB-to-serial port chip through the USB-A interface and is connected with the connector interface through the TTL serial port; the connector interface is connected with the electromagnetic water meter through a cable, upper computer software of a notebook computer reads and debugs data of the electromagnetic water meter through the tool device, meanwhile, power is supplied to the tool through the USB-A interface, the power supply state can be checked through the power source color indicator lamp, and the communication state can be checked through the communication color indicator lamp during serial port communication data. Meanwhile, the low-power-consumption BLE Bluetooth chip is connected with the USB-to-serial-port chip through a TTL serial port and then connected with the notebook computer through a USB-A interface to supply power to the notebook computer, the connector interface is connected with the electromagnetic water meter, and data of the electromagnetic water meter can be debugged and read through wireless Bluetooth connection through a smart phone APP.

Description

Technical Field

[0001] This utility model relates to a Bluetooth and serial communication device for intelligent electromagnetic water meters, suitable for the electromagnetic flow meter industry, such as electromagnetic water meters. It is a serial port or serial-to-Bluetooth circuit device that provides a simple, convenient and fast connection method for communication at the electromagnetic water meter installation site, and provides an important convenient tool for the convenient transmission and monitoring of electromagnetic water meter data. Background Technology

[0002] The existing on-site maintenance of electromagnetic water meters uses a serial port tool connected to a laptop via a cable. The laptop's host computer software then communicates with the electromagnetic water meter and debugs the data. This serial port tool requires one end to connect to the laptop via a USB cable, and the other end to the electromagnetic water meter itself via a cable. This method is inconvenient due to limitations imposed by the confined space and lack of external power supply in the installation environment. Laptops, weighing one or two kilograms, are cumbersome for maintenance personnel, and their batteries only last a few hours, hindering debugging when the electromagnetic water meter is installed in a location without power. Furthermore, because the electromagnetic water meter is installed deep in the well, several meters or even longer cables are needed to connect the serial port tool and the laptop for debugging faulty meters. This serial-to-Bluetooth device is compact and can be powered by a portable power bank or power bank. Because it uses a low-power Bluetooth chip, its power consumption is extremely low; even when Bluetooth is in communication mode, it only consumes a few milliamps of current. Existing power banks typically have a capacity of 10,000 mAh or even larger, allowing it to power the device for weeks, months, or even longer. This solves the power problem for use in power-free outdoor environments. It connects wirelessly via Bluetooth and is easy to carry. Using a common smartphone and an app, it connects to and reads data from an electromagnetic water meter via Bluetooth communication, solving the problems of short battery life and bulky, inconvenient carrying of laptops. This tool also... It features compatibility with original serial port communication tools and can also connect to a laptop via USB-A interface to read and debug electromagnetic water meter data using laptop host computer software. Both debugging methods are available for flexible selection. It also supports Bluetooth wireless communication and smartphone connection. For electromagnetic water meters installed deep underground, a person on the surface can connect via Bluetooth using a smartphone, eliminating the need to operate a laptop underground or on the surface. The compact smartphone operation is more convenient and faster, providing convenience for on-site after-sales personnel. Its small size and light weight make it easier to carry, while also solving the problem of most electromagnetic water meter installation locations being remote and lacking mains power, thus facilitating on-site debugging and use. Summary of the Invention

[0003] In view of the existing on-site installation and maintenance methods of electromagnetic water meters, the technical problem to be solved by this utility model is to provide a tool device for after-sales installation, commissioning and testing of electromagnetic water meters and other related products that is easy to carry, simple to operate, quick to connect wirelessly, and solves the problem of no power supply. This device will make it easier to maintain the on-site use of electromagnetic water meters, reduce waste and save water resources.

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

[0005] An electromagnetic water meter serial-to-Bluetooth communication device includes a USB-A interface, a USB-to-serial chip, a TTL serial port, a power module, power color indicator lights, communication color indicator lights, a low-power BLE Bluetooth chip, Bluetooth connection color indicator lights, and connector interfaces. Its features are:

[0006] The USB-A interface is used to connect to the USB port of a laptop computer, and also to power the tool. The host computer software of the laptop computer can transmit data through the USB-A interface.

[0007] The USB to serial port chip is connected to the connector interface via a TTL serial port, and is connected to the electromagnetic water meter via a cable to read the parameter data of the electromagnetic water meter.

[0008] The TTL serial port is a bus interface level communication circuit for communication between laptops and electromagnetic water meters.

[0009] The power module provides power to the USB to serial port chip, power color indicator, communication color indicator, low power BLE Bluetooth chip, and Bluetooth connection color indicator.

[0010] The power color indicator light serves as a power supply indicator for this device, allowing the device to check its power supply status.

[0011] The communication color indicator light indicates the communication status when the laptop reads data from the electromagnetic water meter, and it can also indicate the communication status when a smartphone APP connects and debugs the reading of data from the electromagnetic water meter via wireless Bluetooth.

[0012] The low-power BLE Bluetooth chip can connect to and debug electromagnetic water meter data through a smartphone APP. At the same time, when using Bluetooth wireless communication, it can be powered by plugging the USB-A interface into a power bank or power bank.

[0013] The Bluetooth connection color indicator is used to indicate the establishment of a wireless Bluetooth connection between the smartphone and the electromagnetic water meter.

[0014] The connector interface is the interface through which this device connects to cables and electromagnetic water meters for data transmission.

[0015] The beneficial effects of this utility model are:

[0016] This utility model is small in size and light in weight, making it easier to carry. It also solves the problem that most electromagnetic water meters are installed in remote locations without mains power, making on-site debugging and use more convenient. Attached Figure Description

[0017] Appendix Figure 1 This is a circuit block diagram of an embodiment of the present utility model.

[0018] Appendix Figure 2 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0019] The embodiments of this utility model are described in further detail below with reference to the accompanying drawings. However, these embodiments are not intended to limit this utility model. Any similar principles or variations of this utility model should be included in the protection scope of this utility model. The commas in this utility model all indicate a relationship between and.

[0020] like Figure 1 The diagram shown is a block diagram of the communication circuit in this communication device. An electromagnetic water meter serial port to Bluetooth communication device includes a USB-A interface, a USB to serial port chip, a TTL serial port, a power module, a power color indicator, a communication color indicator, a low-power BLE Bluetooth chip, a Bluetooth connection color indicator, connector interfaces, and other circuits. The laptop connects to a USB-to-serial chip via a USB-A interface, and then to a connector via a TTL serial port. The connector connects to the electromagnetic water meter via a cable. The laptop's host computer software reads and debugs the electromagnetic water meter data through this tool. The tool is also powered via the USB-A interface, and the power status is indicated by a power color indicator. During serial communication, the communication status is indicated by a communication color indicator. A low-power BLE Bluetooth chip is connected to the USB-to-serial chip via a TTL serial port, and then to the laptop via a USB-A interface for power. The connector connects to the electromagnetic water meter, allowing for wireless debugging and data reading via a smartphone app. A Bluetooth connection color indicator shows that a connection has been established between the smartphone and the electromagnetic water meter. For Bluetooth wireless communication, the USB-A interface can be plugged into a power bank or portable charger for power. Stable data transmission is possible within a 10-meter communication range, without requiring the laptop for communication or power. The power module provides power to the USB-to-serial chip, power color indicator, communication color indicator, low-power BLE Bluetooth chip, and Bluetooth connection color indicator.

[0021] The purpose of this invention is to provide a convenient and quick tool and device for enterprises in the electromagnetic water meter industry to connect and debug faulty electromagnetic water meters during after-sales maintenance of smart electromagnetic water meters.

[0022] like Figure 2 As shown in the figure, the serial port to Bluetooth communication circuit for electromagnetic water meters provided in this embodiment of the present invention facilitates the connection for after-sales maintenance and testing of electromagnetic water meters.

[0023] The low-power BLE Bluetooth chip in this example is a domestically produced chip that uses the latest Bluetooth 5.3 communication protocol. Its ideal working distance can reach 300 meters, and in actual use, it can stably connect and transmit data within 10 meters. Its coverage is approximately four times that of version 4.2, making it more widely applicable and highly stable. The transmission speed is about twice that of previous versions, while also improving spectrum and energy efficiency, resulting in higher information capacity. Its enhanced broadcast capabilities will bring better beacon application capabilities, enabling the creation of more location-based information push services, indoor positioning services, and location navigation services. The Bluetooth 5.3 protocol has stronger compatibility, being compatible with older versions as well. It can better meet the diverse needs of the Internet of Things (IoT), and its extremely low power consumption makes it more energy-efficient, demonstrating superior battery life. Users don't need to worry about running out of power during device use. The serial port transmit pin 6 of the low-power BLE Bluetooth chip U4 is connected to the cathode of Schottky diode D23. The anode of Schottky diode D23 is connected to the anode of Schottky diode D22. The cathode of Schottky diode D22 is connected to pin 8 of the USB-to-serial chip U1. Simultaneously, the anode of Schottky diode D23 is connected to one end of resistor R8, and the other end of resistor R8 is connected to power supply VDD. The anode of Schottky diode D23 is also connected to the cathode of LED D1. The anode of LED D1 is connected to one end of resistor R5, and the other end of resistor R5 is connected to power supply VDD. Furthermore, the anode of Schottky diode D23 is connected to one end of resistor R2, and the other end of resistor R2 is connected to pin 2 of the J4 connector. The other end of resistor R2 is also connected to pin 2 of ESD diode D11, and pin 2 of ESD diode D11 is connected to pin 2 of the J4 connector. The serial port receiver pin 3 of the low-power BLE Bluetooth chip U4 is simultaneously connected to one end of resistor R9, one end of resistor R1, the cathode of LED D2, and the serial port receiver pin 9 of the USB-to-serial chip U1. The peripheral circuit of the low-power BLE Bluetooth chip U4 is composed of external components such as capacitors C20, C110, C74, C102, C15, C91, C76, C61, C81, C71, C31, C14, C1, C2, C201, C13, C101, C41, and C51, resistor R20, inductors L1, L2, and L3, passive crystal oscillators Y1 and Y2, Bluetooth ceramic patch antenna A1, and Bluetooth programming interface J5.

[0024] The anode of the yellow LED D2, the communication color indicator, is connected to one end of resistor R6. The other end of resistor R6 is connected to power supply VDD. The cathode of the yellow LED D2 is simultaneously connected to one end of resistor R9, one end of resistor R1, pin 9 of USB to serial port chip U1, and pin 3 of low-power BLE Bluetooth chip U4. The anode of the green LED D1, the communication color indicator, is connected to one end of resistor R5. The other end of resistor R5 is connected to power supply VDD. The cathode of the green LED D1 is simultaneously connected to one end of resistor R8, one end of resistor R2, the anode of Schottky diode D22, and the anode of Schottky diode D23.

[0025] The anode of the red LED D9, the Bluetooth connection indicator light, is connected to one end of resistor R14, and the other end of resistor R14 is connected to power supply VDD. The cathode of the red LED D9 is connected to pin 1 of the low-power BLE Bluetooth chip U4.

[0026] The anode of the white LED D8, the power indicator light, is connected to one end of resistor R11, and the other end of resistor R11 is connected to the +5V power supply. The cathode of the white LED D8 is connected to ground GND. The +5V power supply is connected to one end of capacitor C6, and the other end of capacitor C6 is connected to ground GND. The +5V power supply is connected to one end of capacitor C5, and the other end of capacitor C5 is connected to ground GND.

[0027] Pin 1 of connector J4 is connected to one end of resistor R1 and also to pin 1 of ESD diode D11. Pin 2 of connector J4 is connected to one end of resistor R2 and also to pin 2 of ESD diode D11. Pin 3 of ESD diode D11 is connected to ground GND. Pin 3 of connector J4 is also connected to ground GND.

[0028] The power supply VCC at pin 1 of the USB-A interface USB1 is connected to one end of the resettable fuse F1. The other end of the resettable fuse F1 is connected to the +5V power supply and also to one end of resistor R3 and one end of resistor R4. Pin 4 of the USB-A interface USB1 is connected to the other ends of resistor R3 and resistor R4, and is also connected to ground GND. Pin 2 of the USB-A interface USB1 is connected to pin 2 of the USB-to-serial chip U1, and pin 3 of the USB-A interface USB1 is connected to pin 1 of the USB-to-serial chip U1.

[0029] The input pin 1 of the power chip U23 of the power module is connected to the positive terminal of capacitor C216, and the negative terminal of capacitor C216 is connected to pin 2 of power chip U23 and ground GND. At the same time, the input pin 1 of power chip U23 is connected to one end of inductor L4, and the other end of inductor L4 is connected to the +5V power supply. The output pin 3 of power chip U23 is connected to the positive terminal of capacitor C215, and the negative terminal of capacitor C215 is connected to pin 2 of power chip U23 and ground GND. At the same time, the output pin 3 of power chip U23 is connected to pins 1 and 2 of ESD diode D10, and pin 3 of ESD diode D10 is connected to ground GND.

[0030] The USB-to-serial chip U1 is a domestically produced chip. Its pin 1 is connected to pin 3 of the USB-A interface USB1, pin 2 is connected to pin 2 of the USB-A interface USB1, pin 3 is connected to ground GND, pin 7 is connected to power supply VDD, pin 7 is also connected to one end of capacitor C3, the other end of capacitor C3 is connected to ground GND, pin 8 is connected to the cathode of Schottky diode D22, pin 9 is connected to one end of resistor R9, one end of resistor R1, the cathode of yellow LED D2, and the serial port receiver pin 3 of the low-power BLE Bluetooth chip U4.

[0031] The TTL serial port is the serial communication connection bus between the USB-to-serial chip U1 and the low-power BLE Bluetooth chip U4.

Claims

1. An electromagnetic water meter serial-to-Bluetooth communication device, comprising a USB-A interface, a USB-to-serial chip, a TTL serial port, a power module, a power color indicator, a communication color indicator, a low-power BLE Bluetooth chip, a Bluetooth connection color indicator, and a connector interface, characterized in that: The USB-A interface is used to connect to the USB port of a laptop computer, and also to power the tool. The host computer software of the laptop computer can transmit data through the USB-A interface. The USB to serial port chip is connected to the connector interface via a TTL serial port, and is connected to the electromagnetic water meter via a cable to read the parameter data of the electromagnetic water meter. The TTL serial port is a bus interface level communication circuit for communication between laptops and electromagnetic water meters. The power module provides power to the USB to serial port chip, power color indicator, communication color indicator, low power BLE Bluetooth chip, and Bluetooth connection color indicator. The power color indicator light serves as a power supply indicator for this device, allowing the device to check its power supply status. The communication color indicator light indicates the communication status when the laptop reads data from the electromagnetic water meter, and it can also indicate the communication status when a smartphone APP connects and debugs the reading of data from the electromagnetic water meter via wireless Bluetooth. The low-power BLE Bluetooth chip can connect to and debug electromagnetic water meter data through a smartphone APP. At the same time, when using Bluetooth wireless communication, it can be powered by plugging the USB-A interface into a power bank or power bank. The Bluetooth connection color indicator is used to indicate the establishment of a wireless Bluetooth connection between the smartphone and the electromagnetic water meter. The connector interface is the interface through which this device connects to cables and electromagnetic water meters for data transmission.

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