CN109282437B - Wireless communication module and air conditioner - Google Patents
Wireless communication module and air conditioner Download PDFInfo
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- CN109282437B CN109282437B CN201811512972.3A CN201811512972A CN109282437B CN 109282437 B CN109282437 B CN 109282437B CN 201811512972 A CN201811512972 A CN 201811512972A CN 109282437 B CN109282437 B CN 109282437B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The application provides a wireless communication module and air conditioner, wherein, wireless communication module includes: the device comprises a main control chip and an appearance interface, wherein the main control chip comprises a reset pin and a debugging serial port input pin; the reset pin is used for resetting the main control chip; the debugging serial port input pin is used for reading and detecting the running state of a program; the reset pin is disconnected with the input pin of the appearance interface; and the debugging serial port input pin is connected with a power supply and used for inputting high level. Through the method and the device, the anti-interference capability of the wireless communication module can be improved, the stability of the program in the wireless communication module is ensured, and the condition of network disconnection is avoided as much as possible.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a wireless communication module and an air conditioner.
Background
With the development of science and technology, household appliances such as air conditioners are more and more intelligent, for example, intelligent air conditioners can be controlled by mobile terminals. The intelligent air conditioner is provided with the wireless communication module so as to realize wireless communication between the air conditioner and external equipment (such as a smart phone) and improve the convenience of controlling the air conditioner.
However, when the existing wireless communication module is interfered, the wireless communication module is easy to crash, disconnect and other faults, and the quality of the air conditioner and the use experience of a user are seriously influenced. Therefore, how to improve the anti-interference capability of the wireless communication module becomes a problem to be solved urgently in the circuit design of the wireless communication module.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first objective of the present application is to provide a wireless communication module, which disconnects the reset pin of the main control chip in the wireless communication module from the input pin of the profile interface, and accesses the high level to the input pin of the debugging serial port of the main control chip, so that the wireless communication module is not affected by the electromagnetic interference input in the profile interface, thereby improving the anti-interference capability of the wireless communication module, ensuring the stability of the program in the wireless communication module, and avoiding the occurrence of network disconnection as much as possible.
A second object of the present application is to provide an air conditioner.
To achieve the above object, a first aspect of the present invention provides a wireless communication module, including: the device comprises a main control chip, an appearance interface and a power supply circuit, and is characterized in that the main control chip comprises a reset pin and a debugging serial port input pin; wherein the content of the first and second substances,
the reset pin is used for resetting the main control chip;
the debugging serial port input pin is used for reading and detecting the running state of a program;
the reset pin is disconnected with the input pin of the appearance interface;
the debugging serial port input pin is connected with a first direct current power supply and used for inputting a high level.
In a possible implementation manner of the embodiment of the application, the debugging serial port input pin of the main control chip and the first direct current power supply are connected with a constant value resistor.
In a possible implementation manner of the embodiment of the application, the resistance value of the fixed resistor is any value between 4 kilohms and 20 kilohms, and the input level of the input pin of the debugging serial port is 3.3 volts.
In a possible implementation manner of the embodiment of the present application, the wireless communication module further includes: a first resistor and a first capacitor;
one end of the first capacitor is connected to a second direct-current power supply, and the other end of the first capacitor is grounded;
one end of the first resistor is connected with the reset pin, and the other end of the first resistor is connected to the second direct-current power supply.
In a possible implementation manner of the embodiment of the present application, the wireless communication module further includes: a clock oscillator circuit, the clock oscillator circuit comprising: a crystal, a second capacitor and a third capacitor;
one end of the second capacitor is connected with one end of the crystal, and the other end of the second capacitor is grounded;
one end of the third capacitor is connected with the other end of the crystal, and the other end of the third capacitor is grounded;
the main control chip comprises a crystal oscillator input pin and a crystal oscillator output pin, the crystal oscillator input pin is connected with one end of the crystal, and the crystal oscillator output pin is connected with the other end of the crystal.
In a possible implementation manner of the embodiment of the present application, the main control chip further includes: a radio frequency input/output pin;
the radio frequency input/output pin is connected with the antenna and used for receiving data sent by external equipment through the antenna and sending the data output by the main control chip to the external equipment through the antenna.
In a possible implementation manner of the embodiment of the present application, the radio frequency input/output pin is connected to the antenna through an inductor.
In a possible implementation manner of the embodiment of the present application, the wireless communication module further includes: a memory chip;
the memory chip comprises four serial data input and output pins, a clock input pin, an enabling pin, a grounding pin and a power supply pin, wherein the four serial data input and output pins, the clock input pin and the enabling pin are respectively connected to different general input and output pins of the main control chip.
In a possible implementation manner of the embodiment of the present application, the wireless communication module further includes: a power supply circuit;
the input end of the power circuit is respectively connected with the power pin of the main control chip, the power pin of the appearance interface and the power pin of the storage chip and used for supplying power to the main control chip, the appearance interface and the storage chip.
The wireless communication module of this application embodiment, through the input pin disconnection of the reset pin of main control chip and appearance interface in with wireless communication module, and meet main control chip's debugging serial ports input pin and power, with the input high level, make wireless communication module not receive the influence of electromagnetic interference input in the appearance interface, wireless communication module's interference killing feature has been promoted, the stability of procedure in the wireless communication module has been guaranteed, the condition of having avoided the network to cut off the connection takes place as far as possible, thereby can promote the wireless communication quality of the air conditioner that uses this wireless communication module, user experience has been promoted.
To achieve the above object, an embodiment of a second aspect of the present application provides an air conditioner, including: the wireless communication module according to the embodiment of the first aspect.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a wireless communication module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a wireless communication module according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a wireless communication module according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a wireless communication module according to a fourth embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a wireless communication module according to a fifth embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a wireless communication module according to a sixth embodiment of the present application;
fig. 7 is a schematic diagram illustrating a connection relationship between components in a wireless communication module according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.
The wireless communication module and the air conditioner according to the embodiment of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a wireless communication module according to an embodiment of the present disclosure.
As shown in fig. 1, the wireless communication module 10 includes: a main control chip 110 and a profile interface 120.
The main control CHIP 110 includes a reset pin (CHIP _ EN, pin 12) and a debug serial input pin (UART _ LOG _ RX, pin 2). The reset pin is used for resetting the main control chip 110; the debugging serial port input pin is used for reading and detecting the program running state in the main control chip 110.
In this embodiment, as shown in fig. 1, the reset pin of the main control chip 110 is disconnected from the input pin (pin 42) of the external interface, and the debug serial port input pin of the main control chip 110 is connected to the first direct current power supply (marked as V1 in fig. 1) for inputting a high level. The debug serial port input pin of the main control chip 110 is also connected to the debug serial port input pin (pin 14) of the profile interface 120.
It should be noted that, during the operation of the wireless communication module 10, the external interface 120 in the wireless communication module 10 is inevitably affected by external electromagnetic interference, and if the reset pin of the main control chip 110 is connected to the input pin (pin 42) of the external interface 120, when the external interface 120 receives electromagnetic signal interference, the input level of the reset pin of the main control chip 110 may be unstable. When the accumulation of the unstable level reaches a certain threshold, the unstable level may interfere with the normal operation of the program in the main control chip 110, thereby causing the wireless communication module 10 to malfunction, such as a crash, a network disconnection, and the like.
In the embodiment of the present application, by disconnecting the reset pin of the main control chip 110 from the input pin (pin 42) of the external interface 120, when the external interface 120 receives electromagnetic signal interference, the electromagnetic signal interference received by the external interface 120 cannot reach the reset pin of the main control chip 110, so that the level input by the reset pin of the main control chip 110 is kept stable, the situation that the program of the main control chip 110 cannot run normally due to unstable input level of the reset pin is avoided, and the anti-interference capability of the wireless communication module 10 is improved.
Further, in this embodiment, the debugging serial port input pin of the main control chip 110 is connected to the first dc power supply V1 to input a high level to the debugging serial port, so that the debugging serial port input pin of the main control chip 110 is stabilized at the high level, and the normal operation of the program in the main control chip 110 is prevented from being influenced by the fluctuation of the external level at the debugging serial port input pin of the main control chip 110, which further causes the occurrence of a network disconnection condition, and further improves the anti-interference capability of the wireless communication module 10.
In a possible implementation manner of the embodiment of the present application, as shown in fig. 2, on the basis of the embodiment shown in fig. 1, a constant value resistor (marked as R3 in fig. 2) is connected between the debugging serial port input pin of the main control chip 110 and the first direct current power supply V1, so that the input level of the debugging serial port input pin of the main control chip 110 is maintained at a stable level value.
As a possible implementation manner, the debugging serial port input pin of the main control chip 110 is connected to the first dc power supply through a fixed-value resistor having a resistance value of any value of 4 kilo-ohms to 20 kilo-ohms, so that the input level of the debugging serial port input pin of the main control chip 110 is maintained at a stable 3.3 v. For example, the debug serial input pin is connected to the first dc power supply through a fixed-value resistor of 4 kilohms, or connected to the first dc power supply through a fixed-value resistor of 10 kilohms, or connected to the first dc power supply through a fixed-value resistor of 20 kilohms, and so on.
In a possible implementation manner of the embodiment of the present application, as shown in fig. 3, on the basis of the embodiment shown in fig. 1, the wireless communication module 10 further includes a first resistor (denoted as R1 in fig. 3) and a first capacitor (denoted as C1 in fig. 3).
One end of the first capacitor C1 is connected to a second direct-current power supply (marked as V2 in fig. 3), and the other end of the first capacitor C1 is grounded; one end of the first resistor R1 is connected to a reset pin of the main control chip 110, and the other end of the first resistor R1 is connected to the second dc power supply V2.
In this embodiment, the second dc power supply V2 is connected to the reset pin of the main control chip 110 through the first resistor R1, and the first resistor R1 plays a role in reducing voltage and current, so as to avoid a situation that the level input by the reset pin is too high to cause a large electromagnetic interference, thereby ensuring the stability of the input level of the reset pin.
In a possible implementation manner of the embodiment of the present application, as shown in fig. 4, based on the embodiment shown in fig. 1, the wireless communication module 10 further includes a clock oscillator circuit 130, where the clock oscillator circuit 130 includes: a crystal (labeled X1 in fig. 4), a second capacitance (labeled C2 in fig. 4), and a third capacitance (labeled C3 in fig. 4).
The crystal X1 may be, for example, a quartz crystal oscillator, and the clock oscillating circuit 130 is configured to provide a reference frequency for the main control chip 110, so as to ensure normal operation of the main control chip 110. In the clock oscillation circuit 130, one end of a second capacitor C2 is connected to one end of the crystal X1, and the other end of the second capacitor C2 is grounded; one end of the third capacitor C3 is connected to the other end of the crystal X1, and the other end of the third capacitor C3 is grounded.
In this embodiment, as shown in fig. 4, the main control chip 110 further includes a crystal oscillator input pin (XI) and a crystal oscillator output pin (XO), the crystal oscillator input pin XI is connected to one end of the crystal X1, and the crystal oscillator output pin XO is connected to the other end of the crystal X1.
In actual wiring, the lengths of the signal lines related to the crystal oscillator input pin XI and the crystal oscillator output pin XO should be shortened as much as possible. By grounding the third capacitor C3 and the second capacitor C2, high frequency interference can be effectively reduced.
In a possible implementation manner of the embodiment of the present application, as shown in fig. 5, on the basis of the embodiment shown in fig. 1, the main control chip 110 further includes a radio frequency input/output pin (labeled as RFIO, pin 9 in fig. 5).
In this embodiment, the radio frequency input/output pin RFIO is connected to an antenna (labeled as ANT in fig. 5), and is configured to receive data sent by an external device through the antenna and send data output by the main control chip 110 to the external device through the antenna.
As shown in fig. 5, the rf input/output pin RFIO is connected to the antenna through an inductor (labeled L1 in fig. 5). Accordingly, by providing an inductance between the rf input/output pin RFIO of the main control chip 110 and the antenna, the matching between the antenna and the RFIO pin can be improved.
Further, in a possible implementation manner of the embodiment of the present application, a dc channel is set at the pin terminal of the radio frequency input/output RFIO to be grounded, so as to implement electrostatic Discharge (ESD) protection, avoid interference of an electromagnetic field generated by an electrostatic Discharge current to the main control chip 110, and avoid damage to the main control chip 110 caused by the electrostatic Discharge current passing through the main control chip 110.
In a possible implementation manner of the embodiment of the present application, as shown in fig. 6, in the basic length of the embodiment shown in fig. 1, the wireless communication module 10 further includes: a memory chip 140.
As shown in fig. 6, the memory chip 140 includes four serial data input/output pins (labeled SIO0, SIO1, SIO2, and SIO3 in fig. 6), one clock input pin (labeled SCLK in fig. 6), one enable pin (labeled CS # infig. 6), one ground pin (labeled GND in fig. 6), and one power supply pin (labeled VCC in fig. 6), wherein the four serial data input/output pins, the clock input pin, and the enable pin in the memory chip 140 are respectively connected to different general purpose input/output (GPIOA) pins in the main control chip 110, the power supply pin is connected to the power supply (labeled V3 in fig. 6), and the ground pin GND is connected to the ground.
The serial data input and output pin SIO2 can also be called a WP pin, and the pin is used as a protection pin, and when a low level is input to the pin, data cannot be erased and modified; the serial data input/output pin SIO3 may also be referred to as a Hold pin, and is used to prevent a malfunction, and when the Hold pin inputs a low level, the main control chip 110 ignores all external commands, so as to achieve the purpose of preventing a malfunction. The SCLK pin provides timing for data transmission of the serial data input output pin.
In a possible implementation manner of the embodiment of the present application, the wireless communication module 10 further includes a power supply circuit, and an input terminal of the power supply circuit is connected to a power supply pin of the main control chip 110, a power supply pin of the external interface 120, and a power supply pin of the memory chip 140, respectively, for supplying power to the main control chip 110, the external interface 120, and the memory chip 140.
The wireless communication module of this application embodiment, through the input pin disconnection of the reset pin of main control chip and appearance interface in with wireless communication module, and meet main control chip's debugging serial ports input pin and power, with the input high level, make wireless communication module not receive the influence of electromagnetic interference input in the appearance interface, wireless communication module's interference killing feature has been promoted, the stability of procedure in the wireless communication module has been guaranteed, the condition of having avoided the network to cut off the connection takes place as far as possible, thereby can promote the wireless communication quality of the air conditioner that uses this wireless communication module, user experience has been promoted.
Fig. 7 is a schematic diagram illustrating a connection relationship between components in a wireless communication module according to an embodiment of the present disclosure. In fig. 7, U1 denotes a main control chip, U3 denotes an external interface, and U4 denotes a memory chip. As shown in fig. 7, the reset pin (CHIP _ EN) of the main control CHIP is not connected to each input pin of the profile interface, so that when the input terminal of the profile interface is interfered by an external electromagnetic signal, the input level of the reset pin of the main control CHIP is not affected. The debugging serial port input pin (UART _ LOG _ RX) of the main control chip is connected with a direct current power supply through a fixed value resistor R3 so as to ensure that the UART _ LOG _ RX pin inputs stable high level. Therefore, the purpose of providing the anti-interference capability of the wireless communication module is achieved.
As can be seen from fig. 7, the main control chip further includes a clock signal pin SWD _ CLK and a test mode strobe pin SWD _ TMS, wherein the SWD _ CLK pin is connected to the 38 pin of the profile interface, and the SWD _ TMS pin is connected to the 39 pin of the profile interface. The antenna is connected with a resistor R0, and is used for determining whether to attach the resistor according to actual requirements, for example, for overseas projects, the resistor R0 attaches a 0 ohm resistor; for domestic items, the resistor R0 is left empty and is not attached so as to meet the requirement of non-attachment.
The application also provides an air conditioner, which comprises the wireless communication module in the embodiment. Because the air conditioner adopts all technical schemes of all the embodiments, the air conditioner at least has all the beneficial effects brought by the technical schemes of the embodiments, thereby ensuring that the air conditioner has good wireless communication quality.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 present application. In this specification, the schematic representations of the terms used above are not necessarily intended to 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 and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.
Claims (10)
1. A wireless communication module, comprising: the device comprises a main control chip and an appearance interface, and is characterized in that the main control chip comprises a reset pin and a debugging serial port input pin; wherein, the first and the second end of the pipe are connected with each other,
the reset pin is used for resetting the main control chip;
the debugging serial port input pin is used for reading and detecting the running state of a program;
the reset pin is disconnected with the input pin of the appearance interface;
the debugging serial port input pin is connected with a first direct current power supply and used for inputting a high level.
2. The wireless communication module of claim 1, wherein a constant resistor is connected between the debug serial port input pin of the main control chip and the first direct current power supply.
3. The wireless communication module of claim 2, wherein the resistance of the fixed resistor is any value between 4 kilohms and 20 kilohms, and the input level of the debug serial port input pin is 3.3 volts.
4. The wireless communication module of claim 1, further comprising: a first resistor and a first capacitor;
one end of the first capacitor is connected to a second direct-current power supply, and the other end of the first capacitor is grounded;
one end of the first resistor is connected with the reset pin, and the other end of the first resistor is connected to the second direct-current power supply.
5. The wireless communication module of claim 1, further comprising: a clock oscillator circuit, the clock oscillator circuit comprising: a crystal, a second capacitor and a third capacitor;
one end of the second capacitor is connected with one end of the crystal, and the other end of the second capacitor is grounded;
one end of the third capacitor is connected with the other end of the crystal, and the other end of the third capacitor is grounded;
the main control chip comprises a crystal oscillator input pin and a crystal oscillator output pin, the crystal oscillator input pin is connected with one end of the crystal, and the crystal oscillator output pin is connected with the other end of the crystal.
6. The wireless communication module of claim 1, wherein the main control chip further comprises: a radio frequency input/output pin;
the radio frequency input/output pin is connected with the antenna and used for receiving data sent by external equipment through the antenna and sending the data output by the main control chip to the external equipment through the antenna.
7. The wireless communication module of claim 6, wherein the RF input/output pin is connected to the antenna via an inductor.
8. The wireless communication module according to any one of claims 1-7, further comprising: a memory chip;
the memory chip comprises four serial data input and output pins, a clock input pin, an enabling pin, a grounding pin and a power supply pin, wherein the four serial data input and output pins, the clock input pin and the enabling pin are respectively connected to different general input and output pins of the main control chip.
9. The wireless communication module of claim 8, further comprising: a power supply circuit;
the input end of the power circuit is respectively connected with the power pin of the main control chip, the power pin of the appearance interface and the power pin of the storage chip and used for supplying power to the main control chip, the appearance interface and the storage chip.
10. An air conditioner characterized by comprising the wireless communication module according to any one of claims 1 to 9.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811512972.3A CN109282437B (en) | 2018-12-11 | 2018-12-11 | Wireless communication module and air conditioner |
| EP19894985.1A EP3875864A4 (en) | 2018-12-11 | 2019-10-28 | Wireless communication module and air conditioner |
| US17/312,595 US20220057096A1 (en) | 2018-12-11 | 2019-10-28 | Wireless communication device and air conditioner |
| PCT/CN2019/113662 WO2020119288A1 (en) | 2018-12-11 | 2019-10-28 | Wireless communication module and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811512972.3A CN109282437B (en) | 2018-12-11 | 2018-12-11 | Wireless communication module and air conditioner |
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| Publication Number | Publication Date |
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| CN109282437A CN109282437A (en) | 2019-01-29 |
| CN109282437B true CN109282437B (en) | 2023-01-17 |
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| CN201811512972.3A Active CN109282437B (en) | 2018-12-11 | 2018-12-11 | Wireless communication module and air conditioner |
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| WO2020119288A1 (en) * | 2018-12-11 | 2020-06-18 | 广东美的制冷设备有限公司 | Wireless communication module and air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000076576A (en) * | 1998-09-03 | 2000-03-14 | Matsushita Electric Ind Co Ltd | Equipment remote control system |
| US6175530B1 (en) * | 1999-05-14 | 2001-01-16 | Xilinx, Inc. | Method for detecting low power on an FPGA interface device |
| JP2003101439A (en) * | 2001-09-25 | 2003-04-04 | Seiko Epson Corp | Radio communication equipment |
| CN105681207A (en) * | 2014-11-20 | 2016-06-15 | 美的集团股份有限公司 | Router and home appliance control system |
| CN209181193U (en) * | 2018-12-11 | 2019-07-30 | 广东美的制冷设备有限公司 | Wireless communication module and air conditioner |
-
2018
- 2018-12-11 CN CN201811512972.3A patent/CN109282437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000076576A (en) * | 1998-09-03 | 2000-03-14 | Matsushita Electric Ind Co Ltd | Equipment remote control system |
| US6175530B1 (en) * | 1999-05-14 | 2001-01-16 | Xilinx, Inc. | Method for detecting low power on an FPGA interface device |
| JP2003101439A (en) * | 2001-09-25 | 2003-04-04 | Seiko Epson Corp | Radio communication equipment |
| CN105681207A (en) * | 2014-11-20 | 2016-06-15 | 美的集团股份有限公司 | Router and home appliance control system |
| CN209181193U (en) * | 2018-12-11 | 2019-07-30 | 广东美的制冷设备有限公司 | Wireless communication module and air conditioner |
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| CN109282437A (en) | 2019-01-29 |
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