CN201336031Y - Wireless SPI-RS232 conversion device - Google Patents
Wireless SPI-RS232 conversion device Download PDFInfo
- Publication number
- CN201336031Y CN201336031Y CNU2008201428613U CN200820142861U CN201336031Y CN 201336031 Y CN201336031 Y CN 201336031Y CN U2008201428613 U CNU2008201428613 U CN U2008201428613U CN 200820142861 U CN200820142861 U CN 200820142861U CN 201336031 Y CN201336031 Y CN 201336031Y
- Authority
- CN
- China
- Prior art keywords
- spi
- data
- interface module
- transmitting
- wireless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 83
- SBWGZAXBCCNRTM-CTHBEMJXSA-N n-methyl-n-[(2s,3r,4r,5r)-2,3,4,5,6-pentahydroxyhexyl]octanamide Chemical compound CCCCCCCC(=O)N(C)C[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO SBWGZAXBCCNRTM-CTHBEMJXSA-N 0.000 claims description 12
- 238000004891 communication Methods 0.000 abstract description 26
- 238000004880 explosion Methods 0.000 abstract description 5
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 230000033772 system development Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 10
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 description 1
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 description 1
- 235000015429 Mirabilis expansa Nutrition 0.000 description 1
- 244000294411 Mirabilis expansa Species 0.000 description 1
- 102100021133 Nuclear protein 1 Human genes 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 235000013536 miso Nutrition 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Landscapes
- Transceivers (AREA)
Abstract
The utility model discloses a wireless SPI-RS232 conversion device which comprises an SPI interface module and an RS232 interface module; wherein, the SPI interface module is connected with SPI equipment for performing SPI data transmission with SPI equipment, and performing wireless transmission of SPI data with the RS232 interface module; the RS232 interface module is connected with RS232 equipment for performing RS232 signal transmission with the RS232 equipment, and performing wireless transmission of SPI data with the SPI interface module. The utility model integrates SPI conversion and wireless transmission into a whole and is applicable to places with complicated terrain condition, high corrosiveness and explosion situation; besides, the utility model is also applicable to moving or rotary acquired objects; meanwhile, the wireless SPI-RS232 conversion device has the advantages of high data transmission speed and high reliability; furthermore, the wireless communication distance can reach 200M so as to effectively satisfy the purposes of embedded system development and PC debugging.
Description
Technical Field
The utility model relates to a data transmission technical field especially relates to a wireless SPI-RS232 conversion equipment.
Background
A Serial Peripheral Interface (SPI) bus system is a synchronous SPI, which allows a Microcontroller (MCU) to communicate with various peripherals in a Serial manner to exchange information, and has a flash memory, a network Controller, an LCD display driver, an a/D converter, and an MCU.
The SPI bus system can directly interface with a variety of standard peripheral devices produced by various manufacturers, typically using 4 wires: serial clock line (SCK), master input/slave output data line MISO, master output/slave input data line MOST, and low level active slave select line SS (some SPI interface chips have interrupt signal line INT or INT, and some SPI interface chips do not have master output/slave input data line MOSI). The SPI interface was first defined by Motorola on its MC68HCXX family of processors. The SPI interface is mainly used between an Electrically erasable programmable Read-Only Memory (EEPROM), a FLASH Memory FLASH, a real-time clock, an analog-to-digital (AD) converter, a digital signal processor, and a digital signal decoder.
RS-232 is one of the communication interfaces on personal computers, and is an asynchronous transmission standard interface established by Electronic Industries Association (EIA). Usually, the RS-232 interface is represented by 9 pins (DB-9) or 25 pins (DB-25), and there are two groups of RS-232 interfaces, called COM1 and COM2, on a common personal computer.
RS-232-C is a serial physical interface standard established by EIA (electronic Industry Association). RS is an abbreviation for english "recommendation", 232 is an identification number, and C indicates the number of times of modification. The RS-232-C bus standard is provided with 25 signal lines in total, and comprises a main channel and an auxiliary channel. In most cases, the main channel is mainly used, and for general duplex communication, only a few signal lines are needed, such as a transmitting line, a receiving line and a ground line.
The RS-232-C standard specifies data transmission rates of 50, 75, 100, 150, 300, 600, 1200, 2400, 4800, 9600, 19200 baud per second.
The RS-232-C standard specifies that the driver allows a capacitive load of 2500pF, and that the communication distance will be limited by this capacitance, e.g. a maximum communication distance of 15m with a 150pF/m communication cable; if the capacitance per meter of cable is reduced, the communication distance can be increased. Another reason for the short transmission distance is that RS-232 is single-ended signal transmission, has problems of common-ground noise and common-mode interference being unable to be suppressed, and is therefore generally used for communication within 20 m.
The serial communication interface standard is used and developed, and at present, several standards exist, but all the standards are formed by improving the RS-232 standard. Therefore, the serial communication interface standard is described mainly by RS-232C. The RS-323C standard is a communication protocol published in 1969 by EIA (electronic industries association) in the united states, developed together with BELL et al. The method is suitable for communication with the data transmission rate in the range of 0-20000 b/s. The standard makes clear specification of the problems related to the serial communication interface, such as signal line function and electrical characteristics. As the communication equipment compatible with the RS-232C standard is produced by the manufacturers of the current equipment, the communication equipment is taken as a standard and is widely adopted in a microcomputer communication interface at present.
Since the present SPI and RS232 are two common communication methods for wired transmission, and the RS232 is a common communication method for electronic computers, the SPI and RS232 are often converted into each other.
However, at present, data transmission between the SPI and the RS232 is mostly performed in a wired manner, and the wired manner has its own advantages, mainly including high data transmission speed, high reliability, strong interference immunity, and stable operation, and can meet the requirements and needs of most data transmissions, but the wired transmission manner also has its own limitations and disadvantages. The wired transmission mode has certain requirements on site environment and transmission objects, and is not suitable for occasions such as complex terrain conditions, high corrosivity and explosion, or the conditions such as motion and rotation of the collected objects.
Therefore, at present, there is an urgent need to develop an SPI-RS232 conversion device, which is suitable for situations such as complex terrain conditions, high corrosivity, and explosion, or situations such as movement and rotation of an acquired object, and has the advantages of high data transmission speed and high reliability.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a wireless SPI-RS232 conversion equipment can fuse SPI and RS 232's conversion and short distance wireless transmission integratively, is applicable to occasions such as complicated terrain condition, high corrosivity, explosion, perhaps is the condition such as motion, rotation by the collection object, and has fast, the high advantage of reliability of data transmission speed simultaneously.
Therefore, the utility model provides a wireless SPI-RS232 conversion device, which comprises an SPI interface module and an RS232 interface module, wherein,
the SPI interface module is connected with the SPI equipment and used for transmitting SPI data with the SPI equipment and wirelessly transmitting the SPI data with the RS232 interface module;
and the RS232 interface module is connected with the RS232 equipment and used for carrying out data transmission of RS232 signals between the RS232 equipment and carrying out wireless transmission of SPI data between the SPI interface module.
Preferably, the SPI device is a variety of devices having SPI interfaces, and the RS232 device is a variety of devices having RS232 interfaces.
Preferably, the SPI interface module comprises an SPI data transmission unit and an SPI transmitting and receiving unit, wherein:
the SPI data transmission unit is used for transmitting SPI data with the SPI equipment and the SPI transmitting and receiving unit;
and the SPI transmitting and receiving unit is respectively connected with the antenna and the SPI data transmission unit and used for transmitting SPI data to the RS232 interface module through the antenna and receiving the SPI data transmitted by the RS232 interface module.
Preferably, the SPI data transmission unit is a single chip microcomputer mega8, and the SPI transmitting and receiving unit is a radio frequency transceiver integrated chip nRF 905.
Preferably, the RS232 interface module includes a data format conversion unit, an RS232 data transmission unit, and an RS232 transmitting and receiving unit, wherein,
the data format conversion unit is used for receiving SPI data transmitted by the RS232 data transmission unit, converting the SPI data into signals in an RS232 format and transmitting the signals to RS232 equipment, and receiving RS232 signals transmitted by the RS232 equipment, converting the signals into SPI data and transmitting the SPI data to the RS232 data transmission unit;
the RS232 data transmission unit is used for transmitting SPI data between the data format conversion unit and the RS232 transmitting and receiving unit;
and the RS232 transmitting and receiving unit is respectively connected with the antenna and the RS232 data transmission unit and is used for transmitting the SPI data to the SPI interface module through the antenna and receiving the SPI data transmitted by the SPI interface module.
Preferably, the data format conversion unit is MAX232, the RS232 data transmission unit is a single chip microcomputer Mega8, and the RS232 transmitting and receiving unit is a radio frequency transceiver integrated chip nRF 905.
Preferably, the data format conversion unit, the RS232 data transmission unit, and the RS232 transmitting and receiving unit may be separate devices; or integrated together.
By the above the technical scheme the utility model provides a it is visible, the utility model discloses it is integrative with SPI and RS 232's conversion and short distance wireless transmission integration, can be applicable to occasions such as complicated topography condition, high corrosivity, explosion, perhaps the object of gathering is the condition such as motion, rotation, and has the advantage that data transmission is fast, the reliability is high simultaneously, wireless communication distance can reach 200M.
Drawings
Fig. 1 is a schematic structural diagram of a wireless SPI-RS232 conversion device provided by the present invention;
fig. 2 is a schematic diagram of a specific implementation of the wireless SPI-RS232 conversion device provided by the present invention.
Detailed Description
In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 and fig. 2, the wireless SPI-RS232 conversion device provided by the present invention comprises an SPI interface module 101 and an RS232 interface module 102, wherein,
the SPI interface module 101 is connected with the SPI equipment, and is used for transmitting SPI data with the SPI equipment and wirelessly transmitting the SPI data with the RS232 interface module 102;
and the RS232 interface module 102 is connected to the RS232 device, and is configured to perform data transmission of RS232 signals with the RS232 device, and perform wireless transmission of SPI data with the SPI interface module 101.
The SPI equipment and the RS232 equipment are spaced at a certain distance, the distance is usually short and cannot exceed 200 meters, and in the specific life and production practice, data communication needs to be carried out between the SPI equipment and the RS232 equipment of a user.
Wherein, SPI equipment is: EEPROM, FLASH, real-time clock, AD converter, digital signal processor and digital signal decoder, etc. The RS232 equipment is as follows: computers, terminals, serial printers and other devices with RS232 interfaces.
The utility model discloses in, SPI interface module 101 is including SPI data transmission unit 1011 and SPI transmission and receiving element 1012, wherein:
an SPI data transmission unit 1011 for transmitting (i.e., inputting and outputting) SPI data with the SPI device and the SPI transmitting and receiving unit 1012;
the SPI transmitting and receiving unit 1012 is connected to the antenna and the SPI data transmission unit 1011, respectively, and is configured to transmit SPI data to the RS232 interface module 102 through the antenna and receive SPI data transmitted by the RS232 interface module 102.
In the specific implementation, the SPI data transmission unit 1011 is a single chip microcomputer Mega8, and the input and output of SPI data between the SPI interface module 101 and the SPI device of the present invention are completed by Mega 8;
in a specific implementation, the SPI transmitting and receiving unit 1012 is a radio frequency transceiver integrated chip nRF905, transmits SPI data of the SPI interface module to the RS232 interface module 102 through the nRF905 and an antenna, and receives the SPI data transmitted from the RS232 interface module 102.
It should be noted that: the data format conversion unit 1021, the RS232 data transmission unit 1022, and the RS232 transmitting and receiving unit 1023 may be separate devices; or integrated together.
In the present invention, the RS232 interface module 102 includes: a data format conversion unit 1021, an RS232 data transmission unit 1022, and an RS232 transmitting and receiving unit 1023. Wherein,
a data format conversion unit 1021, configured to receive SPI data transmitted by the RS232 data transmission unit 1022, convert the SPI data into a signal in an RS232 format, and transmit the signal to an RS232 device, and receive an RS232 signal transmitted by the RS232 device, convert the SPI data into an SPI data, and transmit the SPI data to the RS232 data transmission unit 1022;
an RS232 data transmission unit 1022, configured to perform SPI data transmission (i.e., input and/or output) with the data format conversion unit 1021 and the RS232 transmitting and receiving unit 1023;
the RS232 transmitting and receiving unit 1023 is connected to the antenna and the RS232 data transmission unit 1022, and is configured to transmit SPI data to the SPI interface module 101 through the antenna and receive the SPI data transmitted by the SPI interface module 101.
In a specific implementation, the data format conversion unit 1021 is MAX232, and receives SPI data transmitted by the RS232 data transmission unit 1022 through the MAX232, converts the SPI data into a signal in an RS232 format, and transmits the signal to the RS232 device, or receives a signal in an RS232 format transmitted by the RS232 device, converts the signal into SPI data, and transmits the SPI data to the RS232 data transmission unit 1022.
It should be noted that the Max232 product is a chip compliant with RS232 standard and proposed by Texas Instruments (TI). The device comprises 2 drivers, 2 receivers and a voltage generator circuit providing the TIA/EIA-232-F level. The device conforms to TIA/EIA-232-F standard, and each receiver converts TIA/EIA-232-F level into 5-V TTL/CMOS level. Each transmitter converts the TTL/CMOS levels to TIA/EIA-232-F levels.
In the specific implementation, the RS232 data transmission unit 1022 is a single chip microcomputer Mega8, and the input and output of SPI data between the RS232 interface module 102 and the RS232 device of the present invention are completed by Mega 8;
in a specific implementation, the RS232 transmitting and receiving unit 1023 is a radio frequency transceiver integrated chip nRF905, and transmits SPI data in the RS232 interface module to the SPI interface module 101 through nRF905 and an antenna, and receives SPI data transmitted from the SPI interface module 101.
It should be noted that: the data format conversion unit 1021, the RS232 data transmission unit 1022, and the RS232 transmitting and receiving unit 1023 may be separate devices; or integrated together.
The SPI data transmission unit 1011 and the RS232 data transmission unit 1022 are preferably implemented by an AVR-series high-end single chip microcomputer ATmega8 from ATMEL corporation. ATmega8 is a novel high-grade AVR singlechip manufactured by ATMEL company in the first quarter of 2002. In the AVR family, ATmega8 is a very special single-chip microcomputer, a memory with larger capacity and abundant and powerful hardware interface circuits are integrated in a chip of the single-chip microcomputer, the single-chip microcomputer has all the performances and characteristics of an AVR high-grade single-chip microcomputer MEGE series, and has the characteristics of high speed and abundant peripherals.
The SPI transmitting and receiving unit 1012 and the RS232 transmitting and receiving unit 1023 are preferably Nordic nRF905 radio frequency transceiver integrated chips, have an operating voltage of 1.9-3.6V, and can operate in an ISM band of 433/868/915MHZ by programming. The ShockBurst mode of operation that has the low-power consumption, ShockBurst mode's characteristics are automatic lead code and CRC of production, thereby the effectual needs that satisfy of integrative chip of nRF905 wireless radio frequency receiving and dispatching the utility model discloses the device.
It should be noted that, the low-power short-distance wireless communication technology generally adopts a single-chip digital signal transceiver chip, and a microcontroller and a small number of peripheral devices to form a special or general wireless communication module. The radio frequency chip generally adopts an FSK modulation mode, works in an ISM frequency band, and necessary peripheral modules are integrated in the chip, and a simple and transparent data transmission protocol or a simple encryption protocol is provided, so that a user does not need to deeply know a wireless communication principle and a working mechanism, and a basic data wireless transmission function can be realized only by operating according to an operation interface provided by the chip. The power is small, the price is low, and the development is simple and quick, so the power is widely applied to the industrial and civil fields. But the data transmission speed and the flow are smaller, so that the method is more suitable for building a small network with low requirement on the data transmission speed. Currently, a single chip radio transceiver chip of this type is introduced by many companies, and among them, the Nordic serial chip is more typical.
The utility model discloses a radio frequency chip's in the device selection is last, mainly refer to following principle:
(1) whether the data of the transceiving chip needs to be Manchester coded by software or not.
Chips requiring manchester encoding by software require greater skill and experience in programming, require more memory and program capacity, and manchester encoding significantly reduces the efficiency of data transmission, typically only 1/3 at nominal rates.
(2) The chip transmits power.
The transmission power determines the signal coverage of the wireless chip, and in order to ensure effective and reliable communication under the same conditions, products with higher transmission power and larger power regulation range should be selected.
(3) And the chip has anti-interference performance.
Wireless communication is susceptible to interference, and a chip with high interference resistance should be selected to ensure the reliability of data communication.
(4) Chip power consumption.
Since the slave station node is powered by a battery and has strict requirements on power consumption, a wireless chip in the system should select a product with low power consumption.
(5) The number of peripheral components required by the normal work of the transceiver chip.
The number of peripheral components of the chip directly determines the cost of the product, and therefore, a transceiver chip with few peripheral components should be selected.
(6) Package and pin count of the transceiver chip.
Fewer pins and smaller packaging are beneficial to reducing the area of the PCB and reducing the cost, and the packaging structure is suitable for the design of portable products and is also beneficial to development and production.
In view of Nordic company's nRF905 wireless radio frequency receiving and dispatching integrative chip low power dissipation, data transmission rate is the fastest, required peripheral components and parts are minimum, output is the biggest to adopted and modulated the GFSK modulation that the interference killing feature is stronger than FSK, data transmission is reliable and more stable, consequently, the utility model discloses an nRF905 is chooseed for use as wireless data transmission chip to the device, acts as SPI transmission and receiving element and RS232 transmission and receiving element promptly.
As shown in fig. 2, the SPI module 101 is configured by connecting an I/O port of the SPI of Mega8 to an SPI device, connecting Mega8 to RF905, and connecting RF905 to an antenna.
The RS232 device is connected to the MAX232, RS232 signal data of the RS232 device is subjected to level conversion by the MAX232 and then connected to an asynchronous transceiver (UART) port of the Mega8, the Mega8 is connected to the RF905, and the RF905 is connected to the antenna, thereby forming an RS232 interface module.
To sum up, the utility model discloses an unique mode is exactly to merge SPI conversion and wireless transmission integrative to satisfy uses such as embedded system is open and PC debugging effectively, in addition, the utility model discloses a half-duplex data transmission mode has the characteristics that do not receive the topography restriction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A wireless SPI-RS232 conversion device is characterized by comprising an SPI interface module and an RS232 interface module, wherein,
the SPI interface module is connected with the SPI equipment and used for transmitting SPI data with the SPI equipment and wirelessly transmitting the SPI data with the RS232 interface module;
and the RS232 interface module is connected with the RS232 equipment and used for carrying out data transmission of RS232 signals between the RS232 equipment and carrying out wireless transmission of SPI data between the SPI interface module.
2. The wireless SPI-RS232 conversion apparatus according to claim 1, wherein the SPI device is a device having an SPI interface and the RS232 device is a device having an RS232 interface.
3. The wireless SPI-RS232 conversion device according to claim 1, wherein said SPI interface module comprises an SPI data transmission unit and an SPI transmitting and receiving unit, wherein:
the SPI data transmission unit is used for transmitting SPI data with the SPI equipment and the SPI transmitting and receiving unit;
and the SPI transmitting and receiving unit is respectively connected with the antenna and the SPI data transmission unit and used for transmitting SPI data to the RS232 interface module through the antenna and receiving the SPI data transmitted by the RS232 interface module.
4. The wireless SPI-RS232 conversion device of claim 3 wherein the SPI data transmission unit is a single chip microcomputer mega8 and the SPI transmission and reception unit is a wireless radio frequency transceiver integrated chip nRF 905.
5. The wireless SPI-RS232 conversion device of claim 1 wherein said RS232 interface module includes a data format conversion unit, an RS232 data transmission unit, an RS232 transmit receive unit, wherein,
the data format conversion unit is used for receiving SPI data transmitted by the RS232 data transmission unit, converting the SPI data into signals in an RS232 format and transmitting the signals to RS232 equipment, and receiving RS232 signals transmitted by the RS232 equipment, converting the signals into SPI data and transmitting the SPI data to the RS232 data transmission unit;
the RS232 data transmission unit is used for transmitting SPI data between the data format conversion unit and the RS232 transmitting and receiving unit;
and the RS232 transmitting and receiving unit is respectively connected with the antenna and the RS232 data transmission unit and is used for transmitting the SPI data to the SPI interface module through the antenna and receiving the SPI data transmitted by the SPI interface module.
6. The wireless SPI-RS232 conversion device of claim 5, wherein the data format conversion unit is MAX232, the RS232 data transmission unit is a singlechip Mega8, and the RS232 transmitting and receiving unit is a radio frequency transceiver integrated chip nRF 905.
7. The wireless SPI-RS232 conversion device of claim 5, wherein said data format conversion unit, RS232 data transmission unit, RS232 transmitting and receiving unit can be discrete devices; or integrated together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201428613U CN201336031Y (en) | 2008-10-31 | 2008-10-31 | Wireless SPI-RS232 conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201428613U CN201336031Y (en) | 2008-10-31 | 2008-10-31 | Wireless SPI-RS232 conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201336031Y true CN201336031Y (en) | 2009-10-28 |
Family
ID=41287688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201428613U Expired - Fee Related CN201336031Y (en) | 2008-10-31 | 2008-10-31 | Wireless SPI-RS232 conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201336031Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136664A (en) * | 2010-01-27 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Communication interface switching device |
| CN103116562A (en) * | 2011-09-14 | 2013-05-22 | Vega格里沙贝两合公司 | Method for asynchronous-serial data transfer over a synchronous-serial interface |
| CN103425616B (en) * | 2013-09-02 | 2018-05-25 | 威海北洋光电信息技术股份公司 | SPI-RS232 interface conversions chip and its communication means |
| CN113422618A (en) * | 2021-05-20 | 2021-09-21 | 滴翠智能科技(上海)有限公司 | Low-power-consumption module circuit board integrated with radio communication module |
-
2008
- 2008-10-31 CN CNU2008201428613U patent/CN201336031Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136664A (en) * | 2010-01-27 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Communication interface switching device |
| CN103116562A (en) * | 2011-09-14 | 2013-05-22 | Vega格里沙贝两合公司 | Method for asynchronous-serial data transfer over a synchronous-serial interface |
| CN103425616B (en) * | 2013-09-02 | 2018-05-25 | 威海北洋光电信息技术股份公司 | SPI-RS232 interface conversions chip and its communication means |
| CN113422618A (en) * | 2021-05-20 | 2021-09-21 | 滴翠智能科技(上海)有限公司 | Low-power-consumption module circuit board integrated with radio communication module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101834624B (en) | Data transmission module based on radio frequency chip | |
| CN102573135B (en) | Wireless sensor network node controller, core bottom plate and wireless network access method for sensor | |
| CN202167015U (en) | Serial interface converting circuit | |
| CN201336031Y (en) | Wireless SPI-RS232 conversion device | |
| CN103200081A (en) | Heterogeneous network environment oriented Internet of things gateway development platform | |
| CN103200082A (en) | Ethernet radio network gateway based on Z-Wave technology | |
| CN102088444A (en) | PROFIBUS DP and PROFIBUS PA protocol conversion gateway module | |
| CN110441563A (en) | A kind of intelligent electric energy meter device and communication means based on Bluetooth communication | |
| CN202495961U (en) | Internet of things smart home system based on ZigBee | |
| CN203167288U (en) | Internet of Things gateway development platform facing heterogeneous network environments | |
| CN207732991U (en) | Internet of things data acquisition transmitter based on LoRa | |
| CN211720754U (en) | Low-cost gateway of narrowband thing networking | |
| CN220210468U (en) | Transparent transmission device for mobile communication | |
| CN202153784U (en) | Interface converting circuit for wireless network | |
| CN205912052U (en) | Industry bluetooth wireless transceiver | |
| CN207603633U (en) | Electric safety system Internet of Things data wireless transport module | |
| CN201118577Y (en) | Wireless transparent transmission device | |
| CN2884364Y (en) | Multiple-mode, radio deta acquisition system | |
| CN202728142U (en) | Car-mounted terminal based on combined positioning technology | |
| CN201639580U (en) | Bidirectional transparent transmission device with wireless serial port | |
| CN201774527U (en) | Wireless transceiving module connected with USB interface and based on virtual COM interface | |
| CN201656969U (en) | Data transmission module based on radio frequency chip | |
| CN101420772A (en) | A kind of intelligent energy supply type photoelectric integrated wireless sensor | |
| CN101226678A (en) | Wireless sensing device and wireless network sensing system | |
| CN211531339U (en) | Internet of things gateway based on wireless communication technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20111031 |