CN111968359A - RS 485-based infrared signal transmission control method and system - Google Patents
RS 485-based infrared signal transmission control method and system Download PDFInfo
- Publication number
- CN111968359A CN111968359A CN202010685227.XA CN202010685227A CN111968359A CN 111968359 A CN111968359 A CN 111968359A CN 202010685227 A CN202010685227 A CN 202010685227A CN 111968359 A CN111968359 A CN 111968359A
- Authority
- CN
- China
- Prior art keywords
- camera
- infrared
- interface
- signal
- infrared signal
- 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.)
- Pending
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 87
- 238000004891 communication Methods 0.000 claims description 32
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
Abstract
The invention provides an RS 485-based infrared signal transmission control method and system in the technical field of embedded equipment, wherein the method comprises the following steps: step S10, starting the camera, defaulting to enter a transparent transmission mode, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera; step S20, the embedded device controls the camera to execute corresponding operation based on the received first infrared signal; step S30, the camera receives a control signal of the embedded device or the remote controller to close the transparent transmission mode; step S40, the camera directly performs the corresponding operation based on the received second infrared signal. The invention has the advantages that: the transmission distance of infrared signals is greatly increased.
Description
Technical Field
The invention relates to the technical field of embedded equipment, in particular to an infrared signal transmission control method and system based on RS 485.
Background
The infrared remote control technology has the advantages of strong anti-interference capability, reliable information transmission, low power consumption and the like, and is widely applied to embedded equipment. The infrared remote control transmitting circuit adopts an infrared light emitting diode to emit modulated infrared light waves; the infrared receiving circuit consists of an infrared receiving diode, converts infrared light waves emitted by the infrared light emitting diode into corresponding electric signals, and transmits the electric signals to the amplifier for signal amplification.
Under the scene that the embedded device utilizes the infrared remote control technology to control the camera, the situation that infrared signals cannot be received due to too far distance often occurs. The RS485 interface has good noise interference resistance and is suitable for long-distance transmission, and a half-duplex network formed by the RS485 interface generally only needs two lines, so that the RS485 interface adopts shielded twisted pair transmission.
Therefore, how to provide an infrared signal transmission control method and system based on RS485 to achieve the purpose of increasing the transmission distance of infrared signals becomes a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an infrared signal transmission control method and system based on RS485, so that the transmission distance of infrared signals is increased.
In a first aspect, the invention provides an infrared signal transmission control method based on RS485, which comprises the following steps:
step S10, starting the camera, defaulting to enter a transparent transmission mode, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera;
step S20, the embedded device controls the camera to execute corresponding operation based on the received first infrared signal;
step S30, the camera receives a control signal of the embedded device or the remote controller to close the transparent transmission mode;
step S40, the camera directly performs the corresponding operation based on the received second infrared signal.
Further, the step S10 is specifically:
the camera is started to default to enter a transparent transmission mode, and the camera sends the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface based on a VISCA protocol.
Further, the step S20 is specifically:
the embedded device receives the first infrared signal, generates an infrared execution signal based on the first infrared signal, sends the infrared execution signal to the camera through the first RS485 interface and the second RS485 interface based on a VISCA protocol, and the camera executes corresponding operation based on the received infrared execution signal.
Further, the step S30 is specifically:
the camera receives a control signal for closing the transparent transmission mode sent by the embedded equipment through the first RS485 interface and the second RS485 interface, or receives a control signal for closing the transparent transmission mode sent by the remote controller through the first infrared communication module and the second infrared communication module, and closes the transparent transmission mode based on the received control signal.
Further, the step S40 is specifically:
the camera receives a second infrared signal sent by the remote controller through the first infrared communication module and the second infrared communication module, and directly executes corresponding operation based on the received second infrared signal.
In a second aspect, the invention provides an infrared signal transmission control system based on RS485, which includes the following modules:
the transparent transmission starting module is used for starting the camera, entering a transparent transmission mode by default, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera;
the non-automatic control module is used for controlling the camera to execute corresponding operation based on the received first infrared signal by the embedded equipment;
the transparent transmission closing module is used for closing the transparent transmission mode when the camera receives a control signal of the embedded equipment or the remote controller;
and the automatic control module is used for directly executing corresponding operation based on the received second infrared signal by the camera.
Further, the transparent transmission starting module specifically comprises:
the camera is started to default to enter a transparent transmission mode, and the camera sends the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface based on a VISCA protocol.
Further, the non-autonomous module specifically includes:
the embedded device receives the first infrared signal, generates an infrared execution signal based on the first infrared signal, sends the infrared execution signal to the camera through the first RS485 interface and the second RS485 interface based on a VISCA protocol, and the camera executes corresponding operation based on the received infrared execution signal.
Further, the transparent transmission closing module specifically comprises:
the camera receives a control signal for closing the transparent transmission mode sent by the embedded equipment through the first RS485 interface and the second RS485 interface, or receives a control signal for closing the transparent transmission mode sent by the remote controller through the first infrared communication module and the second infrared communication module, and closes the transparent transmission mode based on the received control signal.
Further, the automatic control module specifically comprises:
the camera receives a second infrared signal sent by the remote controller through the first infrared communication module and the second infrared communication module, and directly executes corresponding operation based on the received second infrared signal.
The invention has the advantages that:
1. the camera and the embedded equipment are connected through the first RS485 interface and the second RS485 interface, and the RS485 interface has good anti-noise interference performance and is suitable for long-distance transmission, so that the embedded equipment can remotely receive the first infrared signal transmitted by the first RS485 interface and the second RS485 interface, the camera is further controlled to execute corresponding operation, and the transmission distance of the infrared signal is greatly increased.
2. By setting a transparent transmission mode, when the transparent transmission mode is started, the camera enters a non-automatic control mode, namely a received first infrared signal is transmitted to the embedded equipment, and the embedded equipment determines to execute what operation; when the transparent transmission mode is closed, the camera enters the automatic control mode, namely, the camera automatically executes corresponding operation according to the received second infrared signal, so that the control mode of the camera is diversified, and the camera is suitable for different scenes.
3. The transparent transmission mode is realized based on the RS485 interface, and the compatibility of the transparent transmission mode is greatly improved.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a flow chart of an infrared signal transmission control method based on RS 485.
Fig. 2 is a schematic structural diagram of an infrared signal transmission control system based on RS 485.
Fig. 3 is a hardware architecture diagram of the present invention.
Detailed Description
The technical scheme in the embodiment of the application has the following general idea: the camera is connected with the embedded equipment through an RS485 interface, the camera is started to enter a transparent transmission mode by default, a received infrared signal is transmitted to the embedded equipment, and the embedded equipment issues a control instruction, namely the camera is in a non-automatic control mode; after the transparent transmission mode is closed through the embedded equipment or the remote controller, the camera receives the infrared signals and then directly executes the infrared signals without sending the infrared signals to the embedded equipment, and enters the automatic control mode, so that the multi-mode control of the camera and the remote transmission of the infrared signals are realized.
The invention is applied to the following infrared control system, including a camera, an embedded apparatus and a remote controller; the camera is respectively connected with the embedded equipment and the remote controller; the embedded equipment is connected with the remote controller; the camera and the embedded equipment are communicated based on a VISCA protocol;
the camera is provided with a first infrared communication module and a first RS485 interface; the embedded device is provided with a third infrared communication module and a second RS485 interface; the remote controller is provided with a second infrared communication module;
the second infrared communication module is respectively connected with the first infrared communication module and the third infrared communication module; and the first RS485 interface is connected with the second RS485 interface.
Referring to fig. 1 to 3, a preferred embodiment of an infrared signal transmission control method based on RS485 according to the present invention includes the following steps:
step S10, starting the camera, defaulting to enter a transparent transmission mode, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera; the RS485 interface supports infrared signal returning and control signal sending in a half-duplex mode, so that the first RS485 interface and the second RS485 interface keep a receiving state when data does not need to be sent, and are switched to a data sending state when data needs to be sent, and are switched back to the receiving state after the data is sent;
the camera and the embedded equipment are connected through the first RS485 interface and the second RS485 interface, and the RS485 interface has good noise interference resistance and is suitable for long-distance transmission, so that the embedded equipment can remotely receive the first infrared signal transmitted by the first RS485 interface and the second RS485 interface, the camera is further controlled to execute corresponding operation, and the transmission distance of the infrared signal is greatly increased;
step S20, the embedded device controls the camera to execute corresponding operation based on the received first infrared signal;
step S30, the camera receives a control signal of the embedded device or the remote controller to close the transparent transmission mode; by setting a transparent transmission mode, when the transparent transmission mode is started, the camera enters a non-automatic control mode, namely a received first infrared signal is transmitted to the embedded equipment, and the embedded equipment determines to execute what operation; when the transparent transmission mode is closed, the camera enters the automatic control mode, namely, the camera automatically executes corresponding operation according to the received second infrared signal, so that the control mode of the camera is diversified, and the camera is suitable for different scenes; the transparent transmission mode is realized based on the RS485 interface, so that the compatibility of the transparent transmission mode is greatly improved;
step S40, the camera directly performs the corresponding operation based on the received second infrared signal.
The step S10 specifically includes:
the camera is started to default to enter a transparent transmission mode, and the camera sends the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface based on a VISCA protocol. The VISCA protocol is a protocol for controlling a camera, and communicates through an RS485 interface, and a basic unit of communication is called a packet, and one packet is composed of a header, a message body, and an end character.
The step S20 specifically includes:
the embedded device receives the first infrared signal, generates an infrared execution signal based on the first infrared signal, sends the infrared execution signal to the camera through the first RS485 interface and the second RS485 interface based on a VISCA protocol, and the camera executes corresponding operation based on the received infrared execution signal.
The step S30 specifically includes:
the camera receives a control signal for closing the transparent transmission mode sent by the embedded equipment through the first RS485 interface and the second RS485 interface, or receives a control signal for closing the transparent transmission mode sent by the remote controller through the first infrared communication module and the second infrared communication module, and closes the transparent transmission mode based on the received control signal.
The step S40 specifically includes:
the camera receives a second infrared signal sent by the remote controller through the first infrared communication module and the second infrared communication module, and directly executes corresponding operation based on the received second infrared signal.
The invention discloses a preferred embodiment of an infrared signal transmission control system based on RS485, which comprises the following modules:
the transparent transmission starting module is used for starting the camera, entering a transparent transmission mode by default, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera; the RS485 interface supports infrared signal returning and control signal sending in a half-duplex mode, so that the first RS485 interface and the second RS485 interface keep a receiving state when data does not need to be sent, and are switched to a data sending state when data needs to be sent, and are switched back to the receiving state after the data is sent;
the camera and the embedded equipment are connected through the first RS485 interface and the second RS485 interface, and the RS485 interface has good noise interference resistance and is suitable for long-distance transmission, so that the embedded equipment can remotely receive the first infrared signal transmitted by the first RS485 interface and the second RS485 interface, the camera is further controlled to execute corresponding operation, and the transmission distance of the infrared signal is greatly increased;
the non-automatic control module is used for controlling the camera to execute corresponding operation based on the received first infrared signal by the embedded equipment;
the transparent transmission closing module is used for closing the transparent transmission mode when the camera receives a control signal of the embedded equipment or the remote controller; by setting a transparent transmission mode, when the transparent transmission mode is started, the camera enters a non-automatic control mode, namely a received first infrared signal is transmitted to the embedded equipment, and the embedded equipment determines to execute what operation; when the transparent transmission mode is closed, the camera enters the automatic control mode, namely, the camera automatically executes corresponding operation according to the received second infrared signal, so that the control mode of the camera is diversified, and the camera is suitable for different scenes; the transparent transmission mode is realized based on the RS485 interface, so that the compatibility of the transparent transmission mode is greatly improved;
and the automatic control module is used for directly executing corresponding operation based on the received second infrared signal by the camera.
The transparent transmission starting module is specifically as follows:
the camera is started to default to enter a transparent transmission mode, and the camera sends the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface based on a VISCA protocol. The VISCA protocol is a protocol for controlling a camera, and communicates through an RS485 interface, and a basic unit of communication is called a packet, and one packet is composed of a header, a message body, and an end character.
The non-automatic control module is specifically as follows:
the embedded device receives the first infrared signal, generates an infrared execution signal based on the first infrared signal, sends the infrared execution signal to the camera through the first RS485 interface and the second RS485 interface based on a VISCA protocol, and the camera executes corresponding operation based on the received infrared execution signal.
The transparent transmission closing module is specifically as follows:
the camera receives a control signal for closing the transparent transmission mode sent by the embedded equipment through the first RS485 interface and the second RS485 interface, or receives a control signal for closing the transparent transmission mode sent by the remote controller through the first infrared communication module and the second infrared communication module, and closes the transparent transmission mode based on the received control signal.
The automatic control module specifically comprises:
the camera receives a second infrared signal sent by the remote controller through the first infrared communication module and the second infrared communication module, and directly executes corresponding operation based on the received second infrared signal.
In summary, the invention has the advantages that:
1. the camera and the embedded equipment are connected through the first RS485 interface and the second RS485 interface, and the RS485 interface has good anti-noise interference performance and is suitable for long-distance transmission, so that the embedded equipment can remotely receive the first infrared signal transmitted by the first RS485 interface and the second RS485 interface, the camera is further controlled to execute corresponding operation, and the transmission distance of the infrared signal is greatly increased.
2. By setting a transparent transmission mode, when the transparent transmission mode is started, the camera enters a non-automatic control mode, namely a received first infrared signal is transmitted to the embedded equipment, and the embedded equipment determines to execute what operation; when the transparent transmission mode is closed, the camera enters the automatic control mode, namely, the camera automatically executes corresponding operation according to the received second infrared signal, so that the control mode of the camera is diversified, and the camera is suitable for different scenes.
3. The transparent transmission mode is realized based on the RS485 interface, and the compatibility of the transparent transmission mode is greatly improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1. An infrared signal transmission control method based on RS485 is characterized in that: the method comprises the following steps:
step S10, starting the camera, defaulting to enter a transparent transmission mode, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera;
step S20, the embedded device controls the camera to execute corresponding operation based on the received first infrared signal;
step S30, the camera receives a control signal of the embedded device or the remote controller to close the transparent transmission mode;
step S40, the camera directly performs the corresponding operation based on the received second infrared signal.
2. The RS 485-based infrared signal transmission control method as claimed in claim 1, wherein: the step S10 specifically includes:
the camera is started to default to enter a transparent transmission mode, and the camera sends the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface based on a VISCA protocol.
3. The RS 485-based infrared signal transmission control method as claimed in claim 1, wherein: the step S20 specifically includes:
the embedded device receives the first infrared signal, generates an infrared execution signal based on the first infrared signal, sends the infrared execution signal to the camera through the first RS485 interface and the second RS485 interface based on a VISCA protocol, and the camera executes corresponding operation based on the received infrared execution signal.
4. The RS 485-based infrared signal transmission control method as claimed in claim 1, wherein: the step S30 specifically includes:
the camera receives a control signal for closing the transparent transmission mode sent by the embedded equipment through the first RS485 interface and the second RS485 interface, or receives a control signal for closing the transparent transmission mode sent by the remote controller through the first infrared communication module and the second infrared communication module, and closes the transparent transmission mode based on the received control signal.
5. The RS 485-based infrared signal transmission control method as claimed in claim 1, wherein: the step S40 specifically includes:
the camera receives a second infrared signal sent by the remote controller through the first infrared communication module and the second infrared communication module, and directly executes corresponding operation based on the received second infrared signal.
6. The utility model provides an infrared signal transmission control system based on RS485 which characterized in that: the system comprises the following modules:
the transparent transmission starting module is used for starting the camera, entering a transparent transmission mode by default, and sending the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface by the camera;
the non-automatic control module is used for controlling the camera to execute corresponding operation based on the received first infrared signal by the embedded equipment;
the transparent transmission closing module is used for closing the transparent transmission mode when the camera receives a control signal of the embedded equipment or the remote controller;
and the automatic control module is used for directly executing corresponding operation based on the received second infrared signal by the camera.
7. The RS485 based infrared signal transmission control system of claim 6, wherein: the transparent transmission starting module is specifically as follows:
the camera is started to default to enter a transparent transmission mode, and the camera sends the received first infrared signal to the embedded equipment through the first RS485 interface and the second RS485 interface based on a VISCA protocol.
8. The RS485 based infrared signal transmission control system of claim 6, wherein: the non-automatic control module is specifically as follows:
the embedded device receives the first infrared signal, generates an infrared execution signal based on the first infrared signal, sends the infrared execution signal to the camera through the first RS485 interface and the second RS485 interface based on a VISCA protocol, and the camera executes corresponding operation based on the received infrared execution signal.
9. The RS485 based infrared signal transmission control system of claim 6, wherein: the transparent transmission closing module is specifically as follows:
the camera receives a control signal for closing the transparent transmission mode sent by the embedded equipment through the first RS485 interface and the second RS485 interface, or receives a control signal for closing the transparent transmission mode sent by the remote controller through the first infrared communication module and the second infrared communication module, and closes the transparent transmission mode based on the received control signal.
10. The RS485 based infrared signal transmission control system of claim 6, wherein: the automatic control module specifically comprises:
the camera receives a second infrared signal sent by the remote controller through the first infrared communication module and the second infrared communication module, and directly executes corresponding operation based on the received second infrared signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010685227.XA CN111968359A (en) | 2020-07-16 | 2020-07-16 | RS 485-based infrared signal transmission control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010685227.XA CN111968359A (en) | 2020-07-16 | 2020-07-16 | RS 485-based infrared signal transmission control method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111968359A true CN111968359A (en) | 2020-11-20 |
Family
ID=73361551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010685227.XA Pending CN111968359A (en) | 2020-07-16 | 2020-07-16 | RS 485-based infrared signal transmission control method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111968359A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103685904A (en) * | 2012-09-14 | 2014-03-26 | 华为技术有限公司 | Video camera management method and equipment |
| US20140333740A1 (en) * | 1998-12-22 | 2014-11-13 | Jonathan G. Ritchie | Obtaining consumer electronic device state information |
| CN204425493U (en) * | 2015-02-04 | 2015-06-24 | 华平信息技术股份有限公司 | Infrared transparent transmission system |
| CN205983824U (en) * | 2016-07-21 | 2017-02-22 | 国家电网公司 | 485 change infrared circuit |
-
2020
- 2020-07-16 CN CN202010685227.XA patent/CN111968359A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140333740A1 (en) * | 1998-12-22 | 2014-11-13 | Jonathan G. Ritchie | Obtaining consumer electronic device state information |
| CN103685904A (en) * | 2012-09-14 | 2014-03-26 | 华为技术有限公司 | Video camera management method and equipment |
| CN204425493U (en) * | 2015-02-04 | 2015-06-24 | 华平信息技术股份有限公司 | Infrared transparent transmission system |
| CN205983824U (en) * | 2016-07-21 | 2017-02-22 | 国家电网公司 | 485 change infrared circuit |
Non-Patent Citations (2)
| Title |
|---|
| BAIWEIHU: "VPC600摄像机能否脱离终端，直接用遥控器控制？", 《HTTPS://FORUM.HUAWEI.COM/ENTERPRISE/ZH/THREAD-379821.HTML》 * |
| GZHUIMEI: "支持红外透传功能视频会议摄像机", 《HTTP://WWW.CA001.COM/THREAD-733523-1-1.HTML》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104216294A (en) | Intelligent household control system and method | |
| US10368169B1 (en) | Power and bandwidth efficient true wireless stereo speakers | |
| CN110267358A (en) | Establish the system, method and blue-tooth device of bluetooth connection | |
| CN114039628B (en) | DP active cable supporting high-speed signal link training | |
| CN111968359A (en) | RS 485-based infrared signal transmission control method and system | |
| CN106549709B (en) | Underwater LED radio optical communication system and its application based on light application time | |
| CN104123830A (en) | Device and method having infrared transponding and infrared detection functions | |
| WO2012163025A1 (en) | Energy-saving method, device and system for optical communication | |
| CN105490949A (en) | Bluetooth 4.0-based intelligent router and control method thereof | |
| CN102104811B (en) | Method, equipment and system for reducing energy consumption of optical transceiver in optical network equipment | |
| CN213073174U (en) | System for intelligence speech control LED bulb and domestic appliance | |
| CN113965713A (en) | HDMI active cable supporting high-speed signal link training | |
| CN101626252A (en) | AISG tower mounted amplifier OOK MODEM circuit | |
| CN201655009U (en) | Electrical appliance remote control system | |
| CN204650224U (en) | A kind of remote speech appliance control system | |
| CN116760474B (en) | Underwater middle-long distance optical communication system and self-adaptive control method thereof | |
| CN210629503U (en) | Acoustic low-power-consumption control system for underwater equipment | |
| CN203193641U (en) | Intelligent optical network of broadcast television network based on remote IP management and control | |
| CN201663602U (en) | Radio and television network intelligent optical receiver based on IP remote management control | |
| CN203661174U (en) | Camera long distance wireless reverse fuzzy control system | |
| CN216751755U (en) | 485 repeater based on MCU control | |
| CN210670066U (en) | Short-distance low-speed magnetic flux simple communication device for underwater detection equipment | |
| CN220421814U (en) | Transmission device utilizing power line for communication | |
| CN114070347B (en) | LoRa communication method and device | |
| CN214045617U (en) | Single-wire communication line of new national standard lithium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201120 |
|
| RJ01 | Rejection of invention patent application after publication |