CN212906596U

CN212906596U - Wireless data module

Info

Publication number: CN212906596U
Application number: CN202022171063.7U
Authority: CN
Inventors: 黄洪
Original assignee: Shenzhen Zht Information Technology Co ltd
Current assignee: Shenzhen Zht Information Technology Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-04-06
Anticipated expiration: 2030-09-28

Abstract

The utility model belongs to the technical field of communication equipment, in particular to a wireless data module, which comprises a power module, a master control chip, a LoRa wireless communication module and a wired communication interface, wherein the interior of the LoRa wireless communication module is connected with the master control chip through a wireless device, and the exterior is connected with a wireless gateway through an antenna; the inside RS232 module or/and RS485 module connection of wired communication interface main control chip, external connection supervisory equipment, power module gives main control chip, loRa wireless communication module, RS232 module, RS485 module power supply, can be with RS232 or RS485 interface and loRa wireless communication module data of each other turning, realize wired equipment wireless transmission's function, need not to change communication protocol and can directly be replaced with wired communication mode for wireless transmission mode, the repacking is with low costs to adopt loRa wireless mode can with gateway from the network deployment, it is far away to have transmission distance, the advantage of equipment low power dissipation.

Description

Wireless data module

Technical Field

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

Background

Environmental monitoring equipment such as all kinds of big or small computer lab, website, school, market adopts wired transmission traditionally, need spend a large amount of time and cost completion wiring work during the field usage, and it is extremely inconvenient to some environmental wiring simultaneously, and the degree of difficulty is great, can't realize the long-range centralized monitoring of supervisory equipment, needs to adopt wireless transmission to realize to these environments, therefore, wireless data module becomes must equipment. Most of the existing wireless modules in the market adopt modes such as WIFI and 4G, the transmission distance is short, the power consumption is large, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome among the prior art supervisory equipment only support wired communication mode, to the problem that the site operation degree of difficulty is big, inconvenient wiring, the utility model provides a can trun into wireless communication mode's equipment with two kinds of wired communication modes of current RS232 and RS485, realize through following technical scheme:

a wireless data module comprises a power supply module, a master control chip, a LoRa wireless communication module and a wired communication interface, wherein the interior of the LoRa wireless communication module is connected with the master control chip through a wireless device, and the exterior of the LoRa wireless communication module is connected with a wireless gateway through an antenna; the inside of the wired communication interface is connected with the main control chip through an RS232 module or/and an RS485 module, and the outside of the wired communication interface is connected with monitoring equipment and used for converting wired data communication of the monitoring equipment into wireless data communication; the power module supplies power to the main control chip, the LoRa wireless communication module, the RS232 module and the RS485 module.

As a further improvement of the wireless data module, the RS232 module and the RS485 module are connected to the same serial port of the main control chip, and the received signal of the RS232 module and the RS485 module adopts a logic device to merge.

The utility model relates to a wireless data module's further improvement still includes power input interface, power input interface inserts DC7 ~ 55V voltage, power module includes first voltage stabilizing circuit and second voltage stabilizing circuit, and first voltage stabilizing circuit will through the switching power supply chip power input interface inserts's voltage truns into DC5V, second voltage stabilizing circuit truns into DC3.3V with DC5V through linear power supply chip.

As a further improvement of the wireless data module of the present invention, the power input interface is connected to DC12V voltage.

As a further improvement of the wireless data module, the main control chip is further provided with a reset button and a status indicator lamp.

The utility model discloses a wireless data module's beneficial effect: can be with RS232 or RS485 interface and the mutual data that change of loRa wireless communication module, realize wired equipment wireless transmission's function, need not to change communication protocol and can directly be replaced by wireless transmission mode with wired communication mode, the repacking is with low costs to adopt loRa wireless mode can with gateway ad hoc network, have transmission distance far away, advantage that equipment low power dissipation.

Drawings

Fig. 1 is a block diagram of a wireless data module according to an embodiment of the present invention;

fig. 2 is a circuit diagram of the main control chip according to the embodiment of the present invention;

fig. 3 is a circuit diagram of a power module according to an embodiment of the present invention;

fig. 4 is a circuit diagram of the embodiment of the present invention;

FIG. 5 is a circuit diagram of RS232 and RS485 wired connection in the embodiment of the present invention;

fig. 6 is a circuit diagram of the wireless connection of LoRa in the embodiment of the present invention;

in the figure: 1. the main control chip, 2, power module, 3, loRa wireless communication module, 4, wired communication interface.

Detailed Description

The present invention will be further described with reference to the following examples, which are only part of the present invention, and these examples are only used to explain the present invention, and do not constitute any limitation to the scope of the present invention.

As shown in the attached drawing 1 of the specification, a wireless data module comprises a power module 2, a wired communication interface 4, a loRa wireless communication module 3, a reset key, a status indicator lamp and a main control chip 1 for controlling each unit, wherein the wired communication interface 4 comprises one or two of an RS232 communication interface and an RS485 communication interface and is used for connecting the RS232 module and the RS485 module, so that the RS232 communication interface or the RS485 communication interface and the loRa wireless communication module 3 can mutually convert data, and the wireless transmission function of wired equipment is realized.

In an embodiment, as shown in fig. 2 of the specification, the main control chip 1 is a single chip microcomputer STM32F303CBT6, the processor has rich internal resources, 72MHz main frequency, a 32-bit ARM-core-M4 kernel, a 128K bytes Flash program memory, a 40K bytes SRAM data memory, and has a plurality of available UARTs and rich GPIO interfaces.

The wireless data module is further provided with a power input interface, the voltage introduced by the power input interface is limited within the range of DC 7-55V, and DC12V is preferably adopted. As shown in fig. 3 of the specification, the power module 2 converts the power into DC5V through the switching power chip LM5007MM, and supplies power to the LoRa wireless communication module 3, the RS232 module, and the RS485 module, and in addition, converts DC5V into DC3.3V through the linear power chip LM1117IMPX-3.3, and supplies power to the main control chip 1 and the status indicator lamp.

As shown in fig. 4 in the specification, the reset key and the status indicator light are connected with the main control chip 1 through GPIO, and specifically, the status indicator light is flash-displayed by the main control chip 1 controlling the logic device SN74LCV1G08, so as to indicate the normal operation status of the wireless data module; the reset key is a mechanical key, is connected with the main control chip through the GPIO, and transmits the state of the reset key to the main control chip 1 for processing, thereby completing the key reset function.

In this embodiment, an RS232 communication interface and an RS485 communication interface are provided at the same time. As shown in fig. 5 in the specification, the RS232 module and the RS485 module are connected to the main control chip 1 through the UART1 and share the same serial port, and the received signals (shown as RXD 1485 and RXD 1232 in the figure) of the RS232 module and the RS485 module are merged to the RXD1 pin of the main control chip 1 by using the logic device SN74LCV1G 08. The RS232 communication interface is realized by adopting an MAX232 driver chip, and the RS485 communication interface is realized by adopting an MAX485 driver chip. And the RS232 communication interface and the RS485 communication interface are used for connecting the serial port monitoring equipment and converting wired data communication into wireless data communication.

As shown in fig. 6 in the specification, the LoRa wireless communication module 3, the diameter E22-400T22S, a wireless device, is connected to the UART2, and the external is connected to the wireless gateway through a 433MHz antenna, and is networked with the gateway in a wireless manner to realize wireless data transmission, so that the transmission distance is longer.

Because serial ports support RS232 communication interface and RS485 communication interface under this wireless data module, can the various serial ports supervisory equipment of wide application to need not to change communication protocol and can insert supervisory equipment, with the direct replacement of current limited communication mode for wireless transmission mode, adopt loRa wireless mode and gateway ad hoc network simultaneously, have transmission distance far away, the advantage of equipment low power dissipation.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. A wireless data module, comprising: the wireless communication system comprises a power supply module, a main control chip, a LoRa wireless communication module and a wired communication interface, wherein the interior of the LoRa wireless communication module is connected with the main control chip through a wireless device, and the exterior of the LoRa wireless communication module is connected with a wireless gateway through an antenna; the inside of the wired communication interface is connected with the main control chip through an RS232 module or/and an RS485 module, and the outside of the wired communication interface is connected with monitoring equipment and used for converting wired data communication of the monitoring equipment into wireless data communication; the power module supplies power to the main control chip, the LoRa wireless communication module, the RS232 module and the RS485 module.

2. The wireless data module of claim 1, wherein: the RS232 module and the RS485 module are connected with the same serial port of the main control chip, and received signals of the RS232 module and the RS485 module are combined through a logic device.

3. A wireless data module according to claim 1 or 2, characterized in that: the power supply module comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit, wherein the first voltage stabilizing circuit converts the voltage accessed by the power supply input interface into DC5V through a switch power supply chip, and the second voltage stabilizing circuit converts DC5V into DC3.3V through a linear power supply chip.

4. The wireless data module of claim 3, wherein: the power input interface is connected with DC12V voltage.

5. The wireless data module of claim 3, wherein: the main control chip is also provided with a reset key and a status indicator lamp.