CN212009561U

CN212009561U - RS485-RF433 communication interface conversion circuit and conversion device

Info

Publication number: CN212009561U
Application number: CN202020975301.7U
Authority: CN
Inventors: 蔡育俊; 陈文杰
Original assignee: Shenzhen Yonsz Information Technology Co ltd
Current assignee: Shenzhen Yajin Smart Technology Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-11-24
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses a RS485-RF433 communication interface conversion circuit, which comprises an RF433 unit, an RS485 unit and a microprocessor unit; the signal input end of the microprocessor unit is coupled to the signal output end of the RF433 unit and is used for receiving the wireless signal output by the RF433 unit; the microprocessor unit converts the wireless signal into a wired signal through digital conversion; and the signal output end of the microprocessor unit is coupled with the signal input end of the RS485 unit and is used for sending the wired signal to the RS485 unit. The improved hotel guest control system is transformed in a wireless mode, the wired RS485 signal is converted in a quick and effective mode and then is accessed into the intelligent server, and the closed loop of RS485 communication is opened, so that more intelligent control and management are realized. The wireless RS485 signal can be converted into the wireless RF433 signal without adding more external equipment, the RS485 intelligent upgrading and transformation with the lowest cost are realized, and the application range is wide.

Description

RS485-RF433 communication interface conversion circuit and conversion device

Technical Field

The utility model relates to a hotel field visitor control management system, the more specifically RS485-RF433 communication interface converting circuit and conversion equipment that says so.

Background

With the development of electronic technology, microelectronic technology and modern control theory, the RS485 technology has gained a leaping development, the market demand is increasing continuously, and the RS485 technology is widely applied in many fields, such as guest control management systems in hotel management and security monitoring systems of hotel buildings.

Along with the technical progress, the hotel entrance experience requirements of customers are increased, a hot tide of the RS485 applied guest control system is formed by upgrading the traditional mechanical guest control system, and compared with the traditional guest control system, the user experience is improved by upgrading and modifying.

The RS485 application system can realize:

1. the intelligent light control can randomly set personalized light scenes according to the preference of the guest, so that the guest can experience the most comfortable guest room environment;

2. the intelligent curtain control can self-define curtain stop points, different actions correspond to different opening and closing degrees through sensor setting, the curtain can be moved by touching lightly, and the motor can be started to automatically open and close by pulling lightly;

3. intelligent temperature control is realized, temperature regulation is realized, the temperature is lasting and comfortable, and when the temperature is high, the temperature is automatically reduced; when the temperature is too low, the air conditioner is automatically closed, so that the energy is effectively saved and the permanent comfort is provided;

4. and the scene mode control realizes one-key control of a user, namely the light control can be realized.

In a word, the RS485 technology is applied to the field of hotels, so that intelligent upgrading of traditional hotels is realized, a network is intelligently integrated, wireless speed is optional, a safety audit interface, internet user authentication and PoE network power supply are realized; intelligent integration guest control, WeChat check-in, intelligent door lock, intelligent light, intelligent curtain, intelligent temperature control, intelligent music, scene control, guest room telephone and 24h guest control voice manager; the IPTV and the television are intelligently integrated with video-on-demand, online shopping, mass resources, network dynamic streaming and the like.

However, in recent years, with the update of communication technology and the rise of intelligent AI hotels, the intelligent voice guest control system gradually becomes one of the necessary items for the transformation and the upgrade of current hotels, so that the upgrade can be performed in the original RS485 guest control system with the minimum cost, which is the first problem faced at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome prior art's not enough, provide a RS485-RF433 communication interface converting circuit and conversion equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the RS485-RF433 communication interface conversion circuit comprises an RF433 unit, an RS485 unit and a microprocessor unit;

the signal input end of the microprocessor unit is coupled to the signal output end of the RF433 unit and is used for receiving the wireless signal output by the RF433 unit;

the microprocessor unit converts the wireless signal into a wired signal through digital conversion;

and the signal output end of the microprocessor unit is coupled with the signal input end of the RS485 unit and is used for sending the wired signal to the RS485 unit.

The RF433 unit comprises a wireless chip, a TXD pin of the wireless chip is coupled with a first RXD pin of the microprocessor unit, and the RXD pin of the wireless chip is coupled with the first TXD pin of the microprocessor unit.

The technical scheme is that a first current limiting resistor is connected in series between a TXD pin of the wireless chip and a first RXD pin of the microprocessor unit, and a second current limiting resistor is connected in series between the RXD pin of the wireless chip and the first TXD pin of the microprocessor unit.

The RS485 unit comprises a wired chip, the wired chip comprises a first differential signal wiring port and a second differential signal wiring port which accord with level specifications, and the first differential signal wiring port and the second differential signal wiring port are used for being connected with peripheral guest control equipment.

The technical scheme is that an RO pin of the wired chip is coupled with a second RXD pin of the microprocessor unit, and a DI pin of the wired chip is coupled with a second TXD pin of the microprocessor unit; the DE pin of the wired chip is coupled to the CMPO pin of the microprocessor unit.

A third current limiting resistor is connected in series between an RO pin of the wired chip and a second RXD pin of the microprocessor unit, and a fourth current limiting resistor is connected in series between a DI pin of the wired chip and a second TXD pin of the microprocessor unit; and a fifth current-limiting resistor is connected in series between the DE pin of the wired chip and the CMPO pin of the microprocessor unit.

The intensive camera port of the microprocessor unit is coupled to the wiring port of the peripheral indicating device and used for transmitting control signals inside the microprocessor unit to control the working state of the peripheral indicating device.

The technical scheme is that the peripheral indicating device is an LED lamp bank, and the LED lamp bank comprises a red LED indicating lamp and a blue LED indicating lamp.

The further technical scheme is that the peripheral indicating device is a xenon lamp.

The utility model also provides a communication interface conversion equipment, including aforementioned RS485-RF433 communication interface converting circuit.

Compared with the prior art, the utility model beneficial effect be:

the utility model provides a RS485-RF433 communication interface converting circuit and conversion equipment has realized through the transformation of wireless mode to current hotel guest control system, inserts intelligent server with faster and effectual mode with wired RS485 signal conversion back, has opened the closed loop of RS485 communication to realize more intelligent control and management. The wireless RS485 signal can be converted into the wireless RF433 signal without adding more external equipment, the RS485 intelligent upgrading and transformation with the lowest cost are realized, and the application range is wide.

The foregoing is a summary of the present invention, and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments, which is provided for the purpose of illustration and understanding of the present invention.

Drawings

Fig. 1 is a schematic diagram of the overall circuit connection of the RS485-RF433 communication interface conversion circuit of the present invention;

FIG. 2 is an enlarged view of the circuit connection between the MCU and the RF433 unit in FIG. 1;

FIG. 3 is an enlarged view of the circuit connection between the MCU and RS485 units in FIG. 1;

fig. 4 is an enlarged view of the circuit connection between the MCU of the microprocessor unit of fig. 1 and the peripheral indicating device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

RS485 is a standard defined to balance the electrical characteristics of drivers and receivers in digital multipoint systems, which is defined by the telecommunications industry association and the electronics industry consortium. The digital communication network using the standard can effectively transmit signals under long-distance conditions and in environments with large electronic noise. RS485 enables the configuration of connecting local networks and multi-drop communication links. The RF433 is a wireless transceiver module, which is a radio frequency technology, also called RF433 radio frequency small module, and is composed of a single IC radio frequency front section produced by full digital technology and an AVR singlechip of ATMEL, a miniature transceiver capable of transmitting data signals at high speed, and the wireless transmitted data is subjected to packing, error detection and error correction. All components adopt industrial standards, the operation is stable and reliable, and the volume is small and the installation is convenient. The system is suitable for the fields of safety alarm, wireless automatic meter reading, home and industrial automation, remote control, wireless data transmission and the like.

Referring to fig. 1-3, embodiment 1 provides an RS485-RF433 communication interface conversion circuit, including an RF433 unit, an RS485 unit, and a microprocessor unit U1; microprocessor unit U1 is preferably a low power microprocessor.

A signal input terminal of the microprocessor unit U1 is coupled to the signal output terminal of the RF433 unit for receiving the wireless signal output by the RF433 unit;

the microprocessor unit U1 converts the wireless signal into a wired signal through digital conversion;

and the signal output end of the microprocessor unit U1 is coupled with the signal input end of the RS485 unit and used for sending a wired signal to the RS485 unit so as to realize the control and query of the guest control equipment in wired connection in a wireless mode. Microprocessor unit U1 also connects to reset circuit M through pin P5.4/RST/MCLKO/SS _3/CMP to perform a reset operation for the warm-boot hardware.

The RF433 unit includes a wireless chip U5, a TXD pin of the wireless chip U5 is coupled with a first RXD pin P0.2/AD2/RXD4 of the microprocessor unit U1, and an RXD pin of the wireless chip U5 is coupled with a first TXD pin P0.3/AD3/TXD4 of the microprocessor unit U1. A first current limiting resistor R14 is connected in series between a TXD pin of the wireless chip U5 and a first RXD pin P0.2/AD2/RXD4 of the microprocessor unit U1, and a second current limiting resistor R15 is connected in series between an RXD pin of the wireless chip U5 and a first TXD pin P0.3/AD3/TXD4 of the microprocessor unit U1.

The wireless chip U5 is connected to the capacitor C19 through a VCC pin and a GND pin, and the wireless chip U5 is also connected to the antenna J2 through an ANT pin.

The RS485 unit comprises a wired chip U4, the wired chip U4 comprises a first differential signal wiring port A and a second differential signal wiring port B which meet the level specification, and the first differential signal wiring port A and the second differential signal wiring port B are used for being connected with peripheral guest control equipment.

The RO pin of the wired chip U4 is coupled with the second RXD pin P1.0/ADC0/CCP1/RXD2 of the microprocessor unit U1, and the DI pin of the wired chip U4 is coupled with the second TXD pin P1.1/ADC1/CCP0/TXD2 of the microprocessor unit U1; the DE pin of the wired chip U4 is coupled to the CMPO pin P1.2/ADC2 SS/ECICCPO of the microprocessor unit U1. A third current limiting resistor R7 is connected in series between the RO pin of the wired chip U4 and the second RXD pin P1.0/ADC0/CCP1/RXD2 of the microprocessor unit U1, and a fourth current limiting resistor R9 is connected in series between the DI pin of the wired chip U4 and the second TXD pin P1.1/ADC1/CCP0/TXD of the microprocessor unit U1; a fifth current limiting resistor R8 is connected in series between the DE pin of the wired chip U4 and the CMPO pin P1.2/ADC2 SS/ECICCPO of the microprocessor unit U1.

As shown in FIG. 4, in the embodiment 2, the intensive camera ports (including the pins P3.5/T1/T0CLKO/CCP0_2 and P3.4/T0/T1CLKO/ECI _ 2) of the microprocessor unit U1 are coupled to the connection ports of the peripheral indicating device for transmitting control signals inside the microprocessor unit U1 to control the operating state of the peripheral indicating device.

In other more specific embodiments, the peripheral indicator is an LED light set including a RED LED indicator LED-RED and a BLUE LED indicator LED-BLUE. More specifically, the peripheral indicating device is preferably a xenon lamp.

The embodiment further provides a communication interface conversion device, which comprises the RS485-RF433 communication interface conversion circuit, and is used for converting the wireless signals into wired signals (i.e. digital signals conforming to the RS485 communication protocol) after analysis, calculation and signal processing, then communicating with the guest control equipment through the wired signals, processing the data sent by the guest control equipment and then accessing the guest control equipment to the server, thereby realizing low-cost intelligent upgrade of the guest control management system.

Compared with the prior art, the RS485-RF433 communication interface conversion circuit and the conversion device of the embodiment realize the transformation of the existing hotel guest control system in a wireless mode, convert the wired RS485 signal in a quick and effective mode and then access the wired RS485 signal into the intelligent server, open the closed loop of RS485 communication, and further realize more intelligent control and management. The wireless RS485 signal can be converted into the wireless RF433 signal without adding more external equipment, the RS485 intelligent upgrading and transformation with the lowest cost are realized, and the application range is wide.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

The RS485-RF433 communication interface conversion circuit is characterized by comprising an RF433 unit, an RS485 unit and a microprocessor unit;

the signal input end of the microprocessor unit is coupled to the signal output end of the RF433 unit and is used for receiving the wireless signal output by the RF433 unit;

the microprocessor unit converts the wireless signal into a wired signal through digital conversion;

and the signal output end of the microprocessor unit is coupled with the signal input end of the RS485 unit and is used for sending the wired signal to the RS485 unit.
2. The RS485-RF433 communication interface conversion circuit according to claim 1 wherein the RF433 unit includes a wireless chip having a TXD pin coupled to a first RXD pin of the microprocessor unit, the RXD pin of the wireless chip coupled to the first TXD pin of the microprocessor unit.
3. The RS485-RF433 communication interface conversion circuit according to claim 2, wherein a first current limiting resistor is connected in series between the TXD pin of the wireless chip and the first RXD pin of the microprocessor unit; and a second current-limiting resistor is connected in series between the RXD pin of the wireless chip and the first TXD pin of the microprocessor unit.
4. The RS485-RF433 communication interface conversion circuit according to claim 1, wherein the RS485 unit comprises a wired chip, the wired chip comprises a first differential signal wiring port and a second differential signal wiring port which conform to a level specification, and the first differential signal wiring port and the second differential signal wiring port are used for connecting a peripheral guest control device.
5. The RS485-RF433 communication interface conversion circuit according to claim 4 wherein the RO pin of the wired chip is coupled to the second RXD pin of the microprocessor unit and the DI pin of the wired chip is coupled to the second TXD pin of the microprocessor unit; the DE pin of the wired chip is coupled to the CMPO pin of the microprocessor unit.
6. The RS485-RF433 communication interface conversion circuit according to claim 5, wherein a third current limiting resistor is connected in series between the RO pin of the wired chip and the second RXD pin of the microprocessor unit; a fourth current limiting resistor is connected in series between the DI pin of the wired chip and the second TXD pin of the microprocessor unit; and a fifth current-limiting resistor is connected in series between the DE pin of the wired chip and the CMPO pin of the microprocessor unit.
7. The RS485-RF433 communication interface converting circuit according to claim 1, wherein the intensive camera port of the microprocessor unit is coupled to a connection port of the peripheral pointing device for transmitting a control signal inside the microprocessor unit to control an operation state of the peripheral pointing device.
8. The RS485-RF433 communication interface converting circuit according to claim 7, wherein the peripheral indicating device is an LED lamp set, and the LED lamp set comprises a red LED indicating lamp and a blue LED indicating lamp.
9. The RS485-RF433 communication interface converting circuit of claim 7, wherein the peripheral indicating device is a xenon lamp.
10. A communication interface converting device comprising the RS485-RF433 communication interface converting circuit according to any one of claims 1 to 9.