CN213399961U

CN213399961U - Wireless data transmission module

Info

Publication number: CN213399961U
Application number: CN202022344194.0U
Authority: CN
Inventors: 郭志超; 郝国良; 王俊; 李宗雪
Original assignee: Weifang Aobo Instrumentation Technology Development Co ltd
Current assignee: Weifang Aobo Instrumentation Technology Development Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-06-08
Anticipated expiration: 2030-10-20

Abstract

The utility model belongs to the technical field of wireless data transmission, especially, relate to a wireless data transmission module, including wireless network module circuit, communication unit circuit, display circuit, keying circuit, power management circuit and core processing unit circuit, wireless network module circuit, communication unit circuit, display circuit, keying circuit and power management circuit respectively with core processing unit circuit connects, the communication unit circuit includes RS232 communication circuit and RS485 communication circuit. The utility model provides a wireless data transmission module has 232 and 485 communication ports, can constitute the system of checking meter with on-the-spot digital instrument, practices thrift manpower and materials, improves data accuracy and ageing, has and shows the button function, can modify convenient to use to module internal parameter through showing the button.

Description

Wireless data transmission module

Technical Field

The utility model belongs to the technical field of wireless data transmission, especially, relate to a wireless data transmission module.

Background

With the development of wireless technologies such as 2G/3G/4G/5G/NBIOT and the like, the wireless data transmission module becomes a bridge for connecting the field device and the remote server, because most field instruments have the characteristic of small data transmission quantity, the existing GSM network based on the 2G network has wide coverage and large capacity as the network system connected with most existing wireless data transmission modules, however, with the rapid development and popularization of 4G technology, 2G networks will have increasingly poor signals with the decrease of base stations, there is an urgent need for a network model that can accommodate more aps, and the network system based on LTE Cat1 is produced, because the network system is a branch based on the 4G system, the method has the characteristics of simple deployment, low base station transformation cost, low transmission power consumption, large transmission data volume and the like for operators, and is rapidly popularized by the operators.

However, at present, no technical solution of wireless data transmission based on the LTE Cat1 technology exists for connection between a field device and a remote server, so that the application provides a wireless data transmission technology based on the LTE Cat1 technology, which is a network mode capable of accommodating more access points.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wireless data transmission module, based on LTE Cat1 technique, can hold more access points, transmission signal is good, is applicable to most on-the-spot instrument data transmission.

In order to achieve the technical purpose, the technical proposal of the utility model is that:

the utility model provides a wireless data transmission module, includes wireless network module circuit, communication unit circuit, display circuit, keying circuit, power management circuit and core processing unit circuit, wireless network module circuit, communication unit circuit, display circuit, keying circuit and power management circuit respectively with core processing unit circuit connects, the communication unit circuit includes RS232 communication circuit and RS485 communication circuit.

As an improvement, the core processing unit circuit comprises a control chip U1, the control chip U1 is provided with a plurality of pins, the pins comprise a communication pin, a power supply pin and a grounding pin, and the communication pin comprises a pin NRST, a pin PD0, a pin PD1, a pin PB0, a pin PB4, a pin PB5, a pin PA0, a pin PA4, a pin PA5, a pin PA6, a pin PA9 and a pin PA 10.

As a further improvement, the key circuit includes more than one key, one end of each key is connected to the ground pin, the other end of each key is respectively connected in series with a resistor to be connected to the power supply pin and the pin PB0, and two ends of each key are connected to a capacitor.

As a further improvement, the wireless network module circuit comprises a communication baseband chip U2A, the communication baseband chip U2A is connected with a communication pin, a power supply pin and a ground pin of the control chip U1, the communication baseband chip U2A is provided with a SIM card connection pin, and the SIM card connection pin comprises a pin SIM-VCC, a pin SIM-CLK, a pin SIM-RST and a pin SIM-DATA.

As a further improvement, the wireless DATA transmission module further comprises an SIM card protection circuit, the SIM card protection circuit comprises an SIM card, the SIM card is provided with a pin VCC, a pin CLK, a pin RST and a pin I/O, the pin VCC is connected with the pin SIM-VCC, the pin CLK is connected with the pin SIM-CLK, the pin RST is connected with the pin SIM-RST, the pin I/O is connected with the pin SIM-DATA, and the pin VCC, the pin CLK, the pin RST and the pin I/O of the SIM card are respectively connected with a series capacitor and a protection diode and grounded.

As a further improvement, the power management circuit comprises a power supply stabilizing chip U3 and a power supply conversion chip U4, a power supply input pin VIN of the power supply stabilizing chip U3 is respectively connected with an alternating current power supply through a series diode D4, a series diode D5 is grounded, cathodes of a diode D4 and a diode D5 are connected with the power supply input pin VIN, a diode D5 is connected with a capacitor IN parallel, an output voltage pin OUT of the power supply stabilizing chip U3 is connected with an input pin IN of the power supply conversion chip U4 and an enable pin EN IN series, the output voltage pin OUT of the power supply conversion chip U4 is connected with a capacitor C26 and a capacitor C27 IN parallel, the capacitor C26 and the capacitor C27 are connected IN parallel, the capacitor C27 is a polar capacitor, and the anode of the capacitor is connected with the output voltage pin OUT of the power supply conversion chip U4;

one end of the inductor connected with the power supply voltage stabilizing chip U3 is connected with the cathode of a diode D7, the anode of the diode D7 is grounded, the other end of the inductor is respectively connected with a capacitor C22, a capacitor C23, a resistor R19 and a resistor R20 which are grounded, the capacitor C22 and the capacitor C23 are connected in parallel, the resistor R19 and the resistor R20 are connected in series, and one end of the resistor R19 connected with the resistor R20 is connected with an output voltage feedback pin FB of the power supply voltage stabilizing chip U3 through a lead;

the inductance with connect field effect transistor Q5 between power conversion chip U4's the input pin IN, field effect transistor Q5's source is connected the inductance with power conversion chip U4's input pin IN, field effect transistor Q5's grid is connected control chip's pin PA0 and power supply foot, it has resistance to concatenate between field effect transistor Q5's grid and the power supply foot, 3.8V power and resistance R26 are connected to field effect transistor Q5's drain electrode, and resistance R26 connects power conversion chip U4's input pin IN and enable foot EN.

As a further improvement, the RS485 communication circuit includes a radio frequency chip U6, the radio frequency chip U6 is provided with a receiver output pin RO, a receiver output enable pin RE, a transmitter output enable pin DE, a transmitter input pin DI, transmitter output/receiver input inverting pins a and B, a power supply pin and a ground pin, the receiver output pin RO is connected with a resistor R34 and a PA9 pin of a control chip U1, the resistor R34 is grounded, the receiver output enable pin RE and the transmitter output enable pin DE are connected with a PB4 pin of the control chip U1, the transmitter input pin DI is connected with a PA10 pin of the control chip U1, the transmitter output/receiver input inverting pin B is connected with the resistor R35, the resistor R35 is connected with bias resistors R37 and 485B serial ports, the bias resistor R37 is grounded, the transmitter output/receiver input inverting pin a is connected with the resistor R36, the resistor R36 is connected with a bias resistor R38 and a 485A serial port, the bias resistor R38 is grounded, and a voltage stabilizing diode is connected between the 485A serial port and the 485B serial port;

the RS232 communication circuit comprises a transceiver chip U7, the transceiver chip U7 is provided with external capacitor pins C1+, C1-, C2+ and C2-, level signal receiving input pins R1IN and R2IN and level transmitting input pins T1IN and T2IN, the external capacitor pins C1+ and C1-are connected through capacitors, the external capacitor pins C2+ and C2-are connected through capacitors, the level signal receiving input pin R1IN is connected with a pin PA9 of the control chip U1, and the level signal receiving input pin R2IN is connected with a pin PA10 of the control chip U1.

As a further improvement, the display circuit comprises a liquid crystal display module LCD1, the liquid crystal display module LCD1 is connected with a field effect transistor Q3, the source electrode of the field effect transistor Q3 is connected with the liquid crystal display module LCD1, the grid electrode of the field effect transistor Q3 is connected with a resistor R14, and the drain electrode of the field effect transistor Q3 is connected with a 3.3V power supply.

As a further improvement, the wireless data transmission module further includes a memory circuit, the memory circuit includes a memory chip U5, the memory chip is provided with a serial data pin SDA, a serial clock pin SCL and a write protection pin WP, the serial data pin SDA is connected to the PA4 pin of the control chip U1, the serial clock pin SCL is connected to the PA5 pin of the control chip U1, and the write protection pin WP is connected to the PA6 pin of the control chip U1.

As a further improvement, the wireless data transmission module further comprises an alarm circuit, the alarm circuit comprises a triode Q4, the base of the triode Q4 is connected with a resistor R16 and a resistor R17, the resistor R16 is connected with a PB5 pin of the control chip U1, the resistor R17 is connected with the emitter of the triode Q4 and the power supply pin of the control chip U1, the collector of the triode Q4 is connected with a buzzer BZ1, and the buzzer BZ1 is grounded.

Due to the adoption of the technical scheme, the beneficial effects of the utility model are that:

the utility model provides a wireless data transmission module, power management circuit provides power supply for entire system, show each item functional parameter through showing circuit control liquid crystal display, modify internal communication parameter and dispose through the keying circuit, the configuration is accomplished the back, preserve the processing to modifying data through storage circuit, prevent that the data outage from losing, the configuration is accomplished the back, then core processing unit circuit begins to carry out the process of networking through AT instruction control wireless network module circuit, after the internet access is normal, the data channel of communication unit circuit and server TCP port has been established this moment, field device can carry out data transmission through this passageway.

The utility model provides a wireless data transmission module has 232 and 485 communication ports, can constitute the system of checking meter with on-the-spot digital instrument, depends on the network platform that network operator found, sends instrument data to the distal end server, then can look over and analysis and management to instrument data through host computer software, compares with traditional artifical on-the-spot meter reading, can practice thrift manpower and materials, improves data accuracy and ageing.

The utility model provides a wireless data transmission module has and shows the button function, can revise the module internal parameter through showing the button, can set up the parameter and include: target IP address and port, APN connection parameter, active uploading heartbeat time interval, serial port baud rate and other communication parameters, 485 communication conversion time, network format, ADR address, heartbeat packet format and the like. The module also has a sound alarm prompt function, can carry out self-diagnosis on errors generated in the networking process, the alarm sound has two types of short sound and long sound, different diagnosis errors are distinguished through the short sound times and the long sound times, and the fault problem generated in the networking process is inquired by contrasting a design manual, so that the fault treatment can be conveniently carried out.

Drawings

Fig. 1 is a schematic block diagram of a wireless data transmission module provided by the present invention;

FIG. 2 is a circuit schematic of a power management circuit;

FIG. 3 is a circuit schematic of a core processing unit circuit;

FIGS. 4 and 5 are schematic circuit diagrams of the communication unit circuit;

FIG. 6 is a circuit diagram of a wireless network module circuit;

FIG. 7 is a circuit schematic of the keying circuit;

FIG. 8 is a circuit schematic of a memory circuit;

FIG. 9 is a circuit schematic of a SIM card protection circuit;

FIG. 10 is a circuit schematic of a display circuit;

FIG. 11 is a circuit schematic of an alarm circuit;

the system comprises a power management circuit, a display circuit, a warning circuit, a core processing unit circuit, a communication unit circuit, a key circuit, a storage circuit, a wireless network module circuit and a SIM card protection circuit, wherein the power management circuit is 1, the display circuit is 2, the warning circuit is 3, the core processing unit circuit is 4, the communication unit circuit is 5, the key circuit is 6, the storage circuit is 7, the wireless network module circuit is 8, and the SIM card.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is 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 invention and are not intended to limit the invention.

As shown in fig. 1 to 11, a wireless data transmission module includes a power management circuit 1, a display circuit 2, an alarm circuit 3, a core processing unit circuit 4, a communication unit circuit 5, a key circuit 6, a storage circuit 7, a wireless network module circuit 8 and an SIM card protection circuit 9, specifically, the power management circuit 1, the display circuit 2, the alarm circuit 3, the communication unit circuit 5, the key circuit 6, the storage circuit 7, the wireless network module circuit 8 and the SIM card protection circuit 9 are all connected by the core processing unit circuit 4, and the communication unit circuit 6 includes an RS232 communication circuit and an RS485 communication circuit.

In this embodiment, the core processing unit circuit includes control chip U1, refer to fig. 3 specifically, control chip U1 may be STM32F103CBT6, control chip U1 is equipped with a plurality of pins, the pin includes communication pin, power supply pin and ground pin, the communication pin includes pin NRST, pin PD0 and pin PD1, pin PB0, pin PB4, pin PB5, pin PA0, pin PA4, pin PA5, pin PA6, pin PA9, pin PA 10.

In this embodiment, the KEY circuit includes more than one KEY, specifically referring to fig. 7, one end of each KEY is connected to a ground pin, the other end is respectively connected to a power supply pin and a pin PB0 in series via a resistor, two ends of each KEY are connected to a capacitor C4, a hardware filtering manner is adopted to eliminate noise when the KEY is pressed down or lifted up, and reduce the probability of misoperation, only a KEY1 SW-PUSH circuit is shown in fig. 7, other KEY circuits are the same, and internal parameters of the module can be modified by displaying the KEYs, and the settable parameters include: target IP address and port, APN connection parameter, active uploading heartbeat time interval, serial port baud rate and other communication parameters, 485 communication conversion time, network format, ADR address, heartbeat packet format and the like.

In this embodiment, the wireless network module circuit includes a communication baseband chip U2A, see fig. 6, the communication baseband chip U2A may be an ML302 chip, the communication baseband chip U2A is connected to a communication pin, a power supply pin and a ground pin of the control chip U1, the communication baseband chip U2A is provided with a SIM card connection pin, the SIM card connection pin includes a pin SIM-VCC, a pin SIM-CLK, a pin SIM-RST and a pin SIM-DATA for connecting to a SIM card protection circuit, and the pin JD-RXD and the pin JD-TXD are respectively connected to a pin PA2 USART2-TX and a pin PSA3 USART2-RX of the control chip U1 through a battery conversion circuit.

In this embodiment, the wireless DATA transmission module further includes a SIM card protection circuit, specifically referring to fig. 9, the SIM card protection circuit includes a SIM card, the SIM card is provided with a pin VCC, a pin CLK, a pin RST and a pin I/O, the pin VCC is connected to the pin SIM-VCC, the pin CLK is connected to the pin SIM-CLK, the pin RST is connected to the pin SIM-RST, the pin I/O is connected to the pin SIM-DATA, and the pin VCC, the pin CLK, the pin RST and the pin I/O of the SIM card are respectively connected to a capacitor in series and a protection diode D6 is grounded, specifically, the protection diode D6 may be an ESD protection diode array ESDA6V1-55C 6.

IN this embodiment, the power management circuit includes a power stabilizing chip U3 and a power conversion chip U4, specifically referring to fig. 2, a power input pin VIN of the power stabilizing chip U3 is respectively connected IN series with a diode D4 to connect an ac power source, a diode D5 is grounded, cathodes of a diode D4 and a diode D5 are connected to the power input pin VIN, a diode D5 is connected IN parallel with a capacitor, an output voltage pin OUT of the power stabilizing chip U3 is connected IN series with an inductor to connect an input pin IN of the power conversion chip U4 and an enable pin EN, an output voltage pin OUT of the power conversion chip U4 is connected IN parallel with a capacitor C26 and a capacitor C27, a capacitor C26 and a capacitor C27 are connected IN parallel, a capacitor C27 is a polar capacitor, and an anode thereof is connected to an output voltage pin OUT of the power conversion chip;

one end of an inductor connected power supply voltage stabilizing chip U3 is connected with the cathode of a diode D7, the anode of a diode D7 is grounded, the other end of the inductor is respectively connected with a capacitor C22, a capacitor C23, a resistor R19 and a resistor R20 which are grounded, a capacitor C22 is connected with the capacitor C23 in parallel, a resistor R19 is connected with the resistor R20 in series, and one end of the resistor R19 connected with the resistor R20 is connected with an output voltage feedback pin FB of the power supply voltage stabilizing chip U3 through a lead;

the inductor and the input pin IN of the power conversion chip U4 are connected with a field effect transistor Q5, the source of the field effect transistor Q5 is connected with the inductor and the input pin IN of the power conversion chip U4, the grid of the field effect transistor Q5 is connected with the pin PA0 and the power supply pin of the control chip, a resistor is connected between the grid of the field effect transistor Q5 and the power supply pin IN series, the drain of the field effect transistor Q5 is connected with a 3.8V power supply and a resistor R26, the resistor R26 is connected with the input pin IN and the enabling pin EN of the power conversion chip U4, and the 3.8V power supply can be used by the communication baseband chip U2A.

The power supply voltage stabilizing chip U3 can be LM2596S-ADJ, and the power supply conversion chip U4 can be MIC5207-3.3 BMS.

In this embodiment, the RS485 communication circuit includes a rf chip U6, the rf chip U6 may be MAX3065, specifically referring to fig. 4, the rf chip U6 is provided with a receiver output pin RO, a receiver output enable pin RE, a transmitter output enable pin DE, a transmitter input pin DI, transmitter output/receiver input inverting pins a and B, a power supply pin and a ground pin, the receiver output pin RO is connected to a resistor R34 and a PA9 pin of a control chip U1, the resistor R34 is grounded, the receiver output enable pin RE and the transmitter output enable pin DE are connected to a PB4 pin of the control chip U1, the transmitter input pin DI is connected to a PA10 pin of a control chip U1, the transmitter output/receiver input inverting pin B is connected to a resistor R35, the resistor R35 is connected to bias resistors R37 and 485B, a serial port resistor R37 is grounded, the transmitter output/receiver input inverting pin a connection resistor R36, the resistor R36 is connected with a bias resistor R38 and a 485A serial port, the bias resistor R38 is grounded, and a voltage stabilizing diode D8 and a voltage stabilizing diode D9 are connected between the 485A serial port and the 485B serial port, so that the bus is protected, and the bus is prevented from being damaged due to overhigh voltage.

The RS232 communication circuit includes a transceiver chip U7, see fig. 10 specifically, the LCD module LCD1 may be JLX12864G-086-PN, the transceiver chip U7 is provided with external capacitor pins C1+, C1-, C2+, and C2-, level signal receiving input pins R1IN and R2IN, and level transmitting input pins T1IN and T2IN, the external capacitor pins C1+ and C1-are connected through capacitors, the external capacitor pins C2+ and C2-are connected through capacitors, the level signal receiving input pin R1IN is connected to a pin PA9 of the control chip U1, and the level signal receiving input pin R2IN is connected to a pin PA10 of the control chip U1, where the transceiver chip U7 may be MAX3232, see fig. 5 specifically.

In this embodiment, the display circuit includes a liquid crystal display module LCD1, the liquid crystal display module LCD1 is connected to a field effect transistor Q3, the source of the field effect transistor Q3 is connected to a liquid crystal display module LCD1, the gate of the field effect transistor Q3 is connected to a resistor R14, and the drain of the field effect transistor Q3 is connected to a 3.3V power supply, which serves as a backlight power supply.

In this embodiment, the memory circuit includes a memory chip U5, specifically referring to fig. 8, the memory chip U5 may be AT24C64B, the memory chip U5 is provided with a serial data pin SDA, a serial clock pin SCL, and a write protect pin WP, the serial data pin SDA is connected to a PA4 pin of the control chip U1, the serial clock pin SCL is connected to a PA5 pin of the control chip U1, and the write protect pin WP is connected to a PA6 pin of the control chip U1.

In this embodiment, the alarm circuit includes a triode Q4, see fig. 11 specifically, a base of a triode Q4 is connected to a resistor R16 and a resistor R17, the resistor R16 is connected to a PB5 pin of a control chip U1, the resistor R17 is connected to an emitter of the triode Q4 and a power supply pin of a control chip U1, a collector of the triode Q4 is connected to a buzzer BZ1, the buzzer BZ1 is grounded, the core processing unit circuit receives networking real-time status information of the wireless network module circuit, and can perform self-diagnosis on an error occurring in the networking process, and then control the alarm circuit to emit short-tone and long-tone alarm sounds, and the diagnosis errors are distinguished by the number of short-tone times and the number of long-tone times, and a problem occurring in the networking process is queried by referring to a design manual, so that fault processing can be performed conveniently.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A wireless data transmission module is characterized by comprising a wireless network module circuit, a communication unit circuit, a display circuit, a key circuit, a power management circuit and a core processing unit circuit, wherein the wireless network module circuit, the communication unit circuit, the display circuit, the key circuit and the power management circuit are respectively connected with the core processing unit circuit, and the communication unit circuit comprises an RS232 communication circuit and an RS485 communication circuit;

the core processing unit circuit comprises a control chip U1, the control chip U1 is provided with a plurality of pins, the pins comprise a communication pin, a power supply pin and a grounding pin, and the communication pin comprises a pin NRST, a pin PD0, a pin PD1, a pin PB0, a pin PB4, a pin PB5, a pin PA0, a pin PA4, a pin PA5, a pin PA6, a pin PA9 and a pin PA 10;

the key circuit comprises more than one key, one end of each key is connected with the grounding pin, the other end of each key is respectively connected with the power supply pin and the pin PB0 in series through resistors, and two ends of each key are connected with a capacitor.

2. The wireless DATA transmission module of claim 1, wherein the wireless network module circuit comprises a communication baseband chip U2A, the communication baseband chip U2A is connected to the communication pin, the power pin and the ground pin of the control chip U1, the communication baseband chip U2A is provided with SIM card connection pins, and the SIM card connection pins comprise a pin SIM-VCC, a pin SIM-CLK, a pin SIM-RST and a pin SIM-DATA.

3. The wireless DATA transmission module of claim 2, further comprising a SIM card protection circuit, wherein the SIM card protection circuit comprises a SIM card, and the SIM card is provided with a pin VCC, a pin CLK, a pin RST and a pin I/O, the pin VCC is connected to the pin SIM-VCC, the pin CLK is connected to the pin SIM-CLK, the pin RST is connected to the pin SIM-RST, the pin I/O is connected to the pin SIM-DATA, and the pin VCC, the pin CLK, the pin RST and the pin I/O of the SIM card are all connected to a series capacitor and a protection diode ground, respectively.

4. The wireless data transmission module of claim 1, wherein the power management circuit comprises a power regulator chip U3 and a power conversion chip U4, the power input pin VIN of the power regulator chip U3 is respectively connected with an ac power source IN series with a diode D4, the series diode D5 is grounded, the cathodes of the diode D4 and a diode D5 are connected with the power input pin VIN, the diode D5 is connected with a capacitor IN parallel, the output voltage pin OUT of the power regulator chip U3 is connected with an input pin IN of the power conversion chip U4 and an enable pin EN IN series with an inductor, the output voltage pin OUT of the power conversion chip U4 is connected with a capacitor C26 and a capacitor C27 IN parallel, the capacitor C26 is connected with the capacitor C27 IN parallel, and the capacitor C27 is a polar capacitor, and the anode of the output voltage pin OUT of the power conversion chip U4 is connected with the anode of the capacitor C27;

5. The wireless data transmission module of claim 1, wherein the RS485 communication circuit comprises a RF chip U6, the RF chip U6 is provided with a receiver output pin RO, a receiver output enable pin RE, a transmitter output enable pin DE, a transmitter input pin DI, transmitter output/receiver input inverting pins A and B, a power supply pin and a ground pin, the receiver output pin RO is connected with a resistor R34 and a PA9 pin of a control chip U1, the resistor R34 is grounded, the receiver output enable pin RE and the transmitter output enable pin DE are connected with a PB4 pin of the control chip U1, the transmitter input pin DI is connected with a PA10 pin of the control chip U1, the transmitter output/receiver input inverting pin B is connected with a resistor R35, the resistor R35 is connected with bias resistors R37 and 485B serial ports, the bias resistor R37 is grounded, the transmitter output/receiver input inverting pin A is connected with the resistor R36, the resistor R36 is connected with the bias resistor R38 and the 485A serial port, the bias resistor R38 is grounded, and a voltage stabilizing diode is connected between the 485A serial port and the 485B serial port;

6. The wireless data transmission module of claim 1, wherein the display circuit comprises a liquid crystal display module LCD1, the liquid crystal display module LCD1 is connected with a field effect transistor Q3, the source of the field effect transistor Q3 is connected with the liquid crystal display module LCD1, the gate of the field effect transistor Q3 is connected with a resistor R14, and the drain of the field effect transistor Q3 is connected with a 3.3V power supply.

7. The wireless data transmission module of claim 1, further comprising a memory circuit, wherein the memory circuit comprises a memory chip U5, the memory chip is provided with a serial data pin SDA, a serial clock pin SCL and a write protection pin WP, the serial data pin SDA is connected to a PA4 pin of the control chip U1, the serial clock pin SCL is connected to a PA5 pin of the control chip U1, and the write protection pin WP is connected to a PA6 pin of the control chip U1.

8. The wireless data transmission module of claim 1, further comprising an alarm circuit, wherein the alarm circuit comprises a transistor Q4, a base of the transistor Q4 is connected with a resistor R16 and a resistor R17, the resistor R16 is connected with a PB5 pin of the control chip U1, the resistor R17 is connected with an emitter of the transistor Q4 and a power supply pin of the control chip U1, a collector of the transistor Q4 is connected with a buzzer BZ1, and the buzzer BZ1 is grounded.