Iot system and wireless conference communication method suitable for wireless conference

Abstract

This invention discloses an IoT system and wireless conferencing communication method suitable for wireless conferencing. A master-end wireless UHF audio module receives audio signals, and a master-end wireless chip establishes a network communication with a wireless microphone unit based on the 802.15.4 protocol. A background application controls the meeting process and sets relevant parameters. A slave-end wireless chip receives control commands sent by the master-end wireless chip, and its UHF audio transmission module collects voice signals according to the control commands and sends the collected voice signals to the master-end wireless UHF audio module. The technical solution of this invention realizes various common meeting management methods in conferencing systems, effectively improves the usability and convenience of wireless UHF conferencing systems, greatly expands the application scope of traditional conferencing, and has advantages such as fast network access speed, low latency, simple structure, and stable reliability.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to an Internet of Things (IoT) system suitable for wireless conferencing and a wireless conferencing communication method based on the IoT system. Background Technology

[0002] Currently, traditional wireless UHF conferencing systems are widely used. These systems are simple in construction, with separate wireless UHF audio transceiver chips at both the transmitting and receiving ends. Once powered on, the system can transmit and receive audio signals. For multi-channel wireless UHF conferencing, the frequency of each wireless microphone unit is typically determined via infrared frequency pairing, allowing the microphone to be used directly during meetings. However, because the wireless audio transceiver module's program is fixed, this type of conferencing system has limited functionality, only capable of audio transmission and reception, and cannot achieve more refined management and control of the conferencing units. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides an IoT system and wireless conferencing communication method suitable for wireless conferencing. By organically combining the master-end wireless UHF audio module and the wireless chip, various common conferencing management methods in the conferencing system are realized while ensuring the normal transmission of audio data by the master-end wireless UHF audio module. This effectively improves the availability and convenience of the wireless UHF conferencing system, greatly expands the application scope of traditional conferencing, and the non-beacon mode network of the 802.15.4 protocol has advantages such as fast network access speed, low latency, simple structure, and stability and reliability.

[0004] To achieve the above objectives, the present invention provides an Internet of Things (IoT) system suitable for wireless conferencing, comprising: a host unit and a wireless microphone unit;

[0005] The host includes a host and a background application. The host includes a main control processor, a main wireless UHF audio module and a main wireless chip. The main wireless UHF audio module and the main wireless chip are respectively connected to the main control processor. The main wireless UHF audio module is used to receive audio signals, and the main wireless chip is used to build a network communication with the wireless microphone unit based on the 802.15.4 protocol.

[0006] The background application is connected to the main control processor and is used to control the meeting process and set relevant parameters;

[0007] The wireless microphone unit includes a wireless UHF audio transmission module, a split-end wireless chip, and a split-end display module. The split-end wireless chip is used to receive control commands sent by the main wireless chip. The wireless UHF audio transmission module is used to collect voice signals according to the control commands and send the collected voice signals to the main wireless UHF audio module. The split-end display module is used to display corresponding conference information according to the control commands.

[0008] In the above technical solution, preferably, the master wireless chip acts as a coordinator to detect the wireless signals in the current environment, set the working frequency, and periodically send broadcast signals to wait for the wireless microphone unit's network access request.

[0009] If the received network access request is determined to be a legitimate access device, the main wireless chip establishes data communication with the wireless microphone unit corresponding to the current network access request.

[0010] In the above technical solution, preferably, the host terminal further includes a host display module and a host button module. The host display module is used to display the meeting information of the wireless conference, and the host button module is used to set and adjust the meeting information through touch commands.

[0011] In the above technical solution, preferably, the wireless microphone unit further includes a split-end unit button, which is connected to the split-end wireless chip and, when triggered, sends a trigger signal to the main-end wireless chip through the split-end wireless chip. The main control processor then implements the conference interaction function based on the trigger signal.

[0012] In the above technical solution, preferably, the main wireless chip and the sub-wireless chip are 433MHz wireless chips, and the main wireless chip and the sub-wireless chip construct a non-beacon mode network based on the 802.15.4 protocol.

[0013] In the above technical solution, preferably, each wireless microphone unit is preset with an identification number and a network address, and during the data communication between the host and each wireless microphone unit, the interactive data packet includes the identification number and network address of the corresponding wireless microphone unit.

[0014] This invention also proposes a wireless conferencing communication method based on an Internet of Things (IoT) system, employing an IoT system suitable for wireless conferencing as disclosed in any of the above technical solutions, comprising:

[0015] The host-side wireless chip detects the wireless signals in the current environment, sets the working frequency, and sends broadcast signals periodically according to the preset network identification number and network address.

[0016] The wireless chip at the end of the wireless microphone unit detects the broadcast signal and sends a network access request to the main wireless chip based on the network identification number and network address of the broadcast signal.

[0017] After receiving a valid network access request, the host parses the network access request data packet and sends a network access confirmation data packet to the branch wireless chip, thus completing the data network interaction with the corresponding wireless microphone unit.

[0018] The host broadcasts interactive commands to all wireless microphone units, and the display modules of the wireless microphone units display corresponding prompts and send the button trigger signals to the host.

[0019] When the speaking button of the wireless microphone unit is triggered, the corresponding trigger signal is sent to the host, which then forwards it to the preset chairman unit. Based on the trigger button of the chairman unit, the speaking of the wireless microphone unit is allowed or prohibited.

[0020] In the above technical solution, preferably, the host broadcasts an interactive command to all wireless microphone units, the display module of each wireless microphone unit displays corresponding prompt information, and sends the button trigger signal to the host. The specific process includes:

[0021] The host broadcasts a check-in command to all wireless microphone units, and the display module of each wireless microphone unit displays the corresponding check-in information and sends the button trigger signal to the host.

[0022] The host broadcasts a voting command to all wireless microphone units, and the display modules of the wireless microphone units display the corresponding voting information and send the button trigger signal to the host.

[0023] In the above technical solution, preferably, the host computer sets different conference speaking modes through a background application, including free mode, first-in-first-out mode, voice control mode and request mode;

[0024] In the free mode, each wireless microphone unit speaks when triggered and stops speaking when triggered again after it has finished speaking;

[0025] In the first-in-first-out mode, the host limits the number of wireless microphone units that can be turned on at the same time, and adds a new wireless microphone unit after the first wireless microphone unit that was turned on is turned off.

[0026] In the voice control mode, the wireless microphone unit that detects someone speaking will be turned on immediately.

[0027] In the application mode, after sending an application to the preset chairman unit and obtaining permission, the corresponding wireless microphone unit is turned on.

[0028] In the above technical solution, preferably, when the chairman unit triggers the priority button, the chairman priority speaking information is sent to the host, and the host shuts down all other activated wireless microphone units, allowing only the chairman unit to speak.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: by organically combining the main wireless U-band audio module and the wireless chip, while ensuring the normal transmission of audio data by the main wireless U-band audio module, various meeting management methods commonly used in the conference system are realized, which effectively improves the availability and convenience of the wireless U-band conference system, greatly expands the application scope of traditional conferences, and the non-beacon mode network of the 802.15.4 protocol has fast network access speed, low latency, simple structure and stable reliability. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the network structure of an Internet of Things (IoT) system suitable for wireless conferencing, as disclosed in one embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the basic structure of an Internet of Things (IoT) system suitable for wireless conferencing, as disclosed in one embodiment of the present invention.

[0032] Figure 3 This is a flowchart illustrating a wireless conference communication method based on an Internet of Things (IoT) system, as disclosed in one embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings:

[0035] like Figure 1 and Figure 2 As shown, an Internet of Things (IoT) system suitable for wireless conferencing according to the present invention includes: a host terminal and a wireless microphone unit;

[0036] The host includes a host and a background application. The host includes a main control processor, a main wireless UHF audio module and a main wireless chip. The main wireless UHF audio module and the main wireless chip are respectively connected to the main control processor. The main wireless UHF audio module is used to receive audio signals, and the main wireless chip is used to build a network communication with the wireless microphone unit based on the 802.15.4 protocol.

[0037] The background application is connected to the main control processor and is used to control the meeting process and set relevant parameters;

[0038] The wireless microphone unit includes a wireless UHF audio transmission module, a split-end wireless chip, and a split-end display module. The split-end wireless chip is used to receive control commands sent from the master wireless chip. The wireless UHF audio transmission module is used to collect voice signals according to the control commands and send the collected voice signals to the master wireless UHF audio module. The split-end display module is used to display the corresponding conference information according to the control commands.

[0039] In this implementation, the conference system typically requires a host or backend to manage conference units, such as viewing units that have joined the conference, active units (those with their microphones on), and units requesting to speak. During the conference, there may be actions such as initiating check-in and voting, requiring each participating unit to receive the information and respond. The host needs to collect and statistically analyze the data. Units that do not belong to the current conference room should be refused entry to avoid interference. To achieve these functions, all conference units need to be connected to a network, and each unit can be managed through the network. This is how a more feature-rich system can be achieved.

[0040] Specifically, this invention utilizes the 802.15.4 wireless protocol to implement a network-enabled wireless UHF conferencing system. All participating units join a single network for unified management and to enable various functions. The host or backend can set a conferencing network ID, with each unit assigned the same ID, ensuring the entire conferencing system is on the same network. The host broadcasts commands (such as check-in, voting, and decision-making), which are received by all units. Each unit can then display its corresponding interface, allowing participants to perform actions like check-in, voting, and decision-making using their wireless units at their seats. Furthermore, the network allows the host to control any unit, enabling it to turn its microphone on or off; units can send messages to the host requesting to speak or receive assistance, or reporting their status. Compared to traditional wireless UHF conferencing systems, this system is more convenient and offers more comprehensive functionality.

[0041] The system integrates a main-end wireless UHF audio module and a sub-1G main-end wireless chip supporting 433MHz signals. The main-end wireless UHF audio module is used to send and receive audio signals at frequencies above 600MHz; the sub-1G main-end wireless chip operates at 433MHz and is used to implement 802.15.4 protocol networking, as well as conference process management and unit control.

[0042] The 802.15.4 protocol is a technical standard for low-speed personal area networks (PANs). It focuses on low-cost, low-speed communication between devices, emphasizing low-cost communication between nearby devices with virtually no underlying infrastructure. These characteristics have led to the widespread adoption of the 802.15.4 protocol, allowing for the easy creation of PANs that meet specific needs using simple equipment. Within a PAN, devices play two roles: coordinator and endpoints. The coordinator can be understood as the main controller of the entire network; it generates a unique network identifier to identify the current network. Endpoints are the individual devices connected to the coordinator, which recognizes and allows them to join the network by sending request information containing the network identifier.

[0043] The 802.15.4 protocol supports point-to-point networks or star networks, and of course, a combination of the two structures can also be used to form a composite network. For example... Figure 1 As shown, in this embodiment, a star network is preferably used, with the host's 433MHz master wireless chip serving as the coordinator (center) of the entire network and the wireless microphone (MIC) unit serving as the terminal node.

[0044] Since each wireless unit in the conference system only needs to interact with the host (coordinator), the star topology is a suitable network structure, and the data flow is simple and easy to implement.

[0045] This implements the non-beacon mode of the 802.15.4 protocol, which has the following advantages:

[0046] (1) Beacon mode is synchronous transmission, requiring any node to interact with data only when a synchronous beacon arrives. When there are many node units, the total data volume is too large, increasing the probability of a transmission failure; while non-beacon mode is asynchronous transmission, and multiple node units do not need to send data at the same time, resulting in a higher data transmission success rate when there are many node units.

[0047] (2) To achieve synchronous transmission, beacon mode requires periodically broadcasting beacon data, even when there is no data interaction. Conferencing systems do not require frequent data interaction, so periodic beacon sending is unnecessary. The communication logic of non-beacon mode allows data to be sent immediately upon availability without waiting. This makes data transmission across the entire network more flexible.

[0048] (3) After the system is powered on and the network is established, the host needs to send beacons periodically, and the unit needs to receive beacons periodically, which increases the power consumption of both parties. The non-beacon mode used in this invention can save a lot of power consumption. For battery-powered wireless microphone (MIC) units, low power consumption is crucial.

[0049] In the above embodiments, preferably, the master wireless chip acts as a coordinator to detect the wireless signals in the current environment, set the operating frequency, and periodically send broadcast signals to wait for the wireless microphone unit's network access request.

[0050] If the received network access request is deemed a legitimate access device, the master wireless chip establishes data communication with the wireless microphone unit corresponding to the current network access request.

[0051] In the above embodiments, preferably, the host terminal also includes a host display module and a host button module. The host display module is used to display the meeting information of the wireless conference, and the host button module is used to set and adjust the meeting information through touch commands.

[0052] The host unit's 433MHz wireless chip acts as the personal area network coordinator, responsible for network setup and communication. The host wireless UHF audio module receives audio signals. The host unit also integrates an LCD module to display current meeting information, such as meeting mode, number of participants, volume level, and attendance / voting results. Users can access the settings page via buttons next to the LCD to configure parameters. The backend is an application running on a PC, allowing meeting administrators to control the meeting process and set relevant parameters; some functions are the same as the parameter settings on the LCD interface.

[0053] The wireless microphone unit (MIC) also integrates a 433MHz split-end wireless chip, a wireless UHF audio transmission module, and a split-end display module (LCD). The LCD module displays basic information about the current meeting and changes the interface according to commands from the host, such as "Network in progress," "Speaking in progress," "Check-in in progress," and "Voting in progress," making it easy for participants to understand the meeting and equipment status. The wireless UHF audio transmission module is only responsible for transmitting audio, as the wireless microphone unit is only used for speaking. The 433MHz split-end wireless chip acts as an endpoint device in the personal area network, responsible for communicating with the 433MHz master-end wireless chip (wireless coordinator) in the host.

[0054] The wireless coordinator stores information about all endpoint devices that have joined the network and assigns them numbers; it queries and stores the status of each wireless unit, such as whether it is online, whether it is the chairman unit, whether its microphone is on, and whether it has completed check-in or voting; when the chairman unit initiates a vote or other command that requires a response from all units, the coordinator broadcasts the wireless command, and each unit needs to respond.

[0055] In the above embodiments, preferably, the wireless microphone unit further includes a split-end unit button, which is connected to the split-end wireless chip and sends a trigger signal to the main-end wireless chip through the split-end wireless chip when triggered. The main control processor realizes the conference interaction function according to the trigger signal.

[0056] In the above embodiments, preferably, the main wireless chip and the sub-wireless chip are 433MHz wireless chips, and the main wireless chip and the sub-wireless chip construct a non-beacon mode network based on the 802.15.4 protocol.

[0057] In the above embodiments, preferably, each wireless microphone unit is preset with an identification number and a network address. During the data communication between the host and each wireless microphone unit, the interactive data packet includes the identification number and network address of the corresponding wireless microphone unit.

[0058] In this implementation, the conference system is functionally divided into two parts:

[0059] (1) Host

[0060] The host includes wireless audio data reception and 433MHz wireless data transceiver. As the host, the 433MHz wireless transceiver module is a full-featured device, meaning it implements almost all the functions described in the 802.15.4 protocol. It can detect / create networks, initiate network formation, receive network access requests, and manage the various node unit devices joining the network.

[0061] (2) Unit

[0062] The unit includes wireless audio data transmission and 433MHz wireless data transmission and reception. The 433MHz wireless transceiver module in the unit is a simplified function device. It enables networking and 433MHz wireless data transmission and reception, but it does not have network management functions compared to a full-function device.

[0063] like Figure 3 As shown, the present invention also proposes a wireless conferencing communication method based on an Internet of Things (IoT) system, applying an IoT system suitable for wireless conferencing as disclosed in any of the above embodiments, including:

[0064] The host-side wireless chip detects the wireless signals in the current environment, sets the working frequency, and sends broadcast signals periodically according to the preset network identification number and network address.

[0065] The wireless chip at the end of the wireless microphone unit detects the broadcast signal and sends a network access request to the main wireless chip based on the network identification number and network address of the broadcast signal.

[0066] When the master wireless chip receives a valid network access request, the host parses the network access request data packet and sends a network access confirmation data packet to the slave wireless chip, thus completing the data network interaction with the corresponding wireless microphone unit.

[0067] The host broadcasts interactive commands to all wireless microphone units, the display modules of the wireless microphone units display corresponding prompts, and send the button trigger signals to the host.

[0068] When the speaking button of the wireless microphone unit is triggered, the corresponding trigger signal is sent to the host, which then forwards it to the preset chairman unit. Based on the trigger button of the chairman unit, the speaking of the wireless microphone unit is allowed or prohibited.

[0069] In this implementation, the networking process for the conference system is as follows:

[0070] (1) The host 433MHz wireless module acts as a coordinator. It first detects the 433MHz frequency band wireless signal in the current environment and then selects a clean or less interference-free frequency band as the working frequency of the current network.

[0071] (2) The wireless coordinator sets a network identifier (ID) and a network address, and then periodically sends out broadcast signals. The broadcast data includes the network ID and address, the current network operating frequency and the flag that allows joining the network, and waits for the unit device to join the network request.

[0072] (3) The 433MHz wireless module of the wireless unit device is a simplified function device. After power-on, it periodically detects the broadcast signal. If a legitimate network signal is found (i.e., a valid network ID, address, and permission to join), it sends a network access request. The request data includes the module's own address and other attributes.

[0073] (4) After receiving a valid network access request data packet, the wireless coordinator parses it. If it determines that the device is a legitimate access device and the number of currently connected devices does not exceed the maximum value (255 wireless microphone MIC units), it sends a network access confirmation data packet and saves the device address and other information to the wireless coordinator's buffer for subsequent communication.

[0074] (5) When a unit device receives a network access confirmation data packet, it considers itself to have joined the network and can perform data interaction.

[0075] (6) All communication uses the CSMA / CA mechanism. When the sender does not receive the response signal from the other party, it considers the current channel to be congested and waits for a period of time to retransmit. The number of retransmissions can be set arbitrarily.

[0076] Through the above-described non-beacon mode personal area network (PAN) networking process, after joining the network, any unit and host can communicate freely, and the communication method adopts the above-described non-beacon mode asynchronous communication.

[0077] Based on the communication method, it can be divided into unicast communication and broadcast communication.

[0078] Broadcast: Only the coordinator can send broadcasts to all units. This is used for operations that all units must perform, such as initiating meeting check-in from the host, voting / voting, or when the system modifies certain parameters and needs to disseminate this information to all wireless units. The broadcast process is relatively simple: the wireless coordinator sets the broadcast address, adds the content to be broadcast to the data frame, and then transmits the data through the 433MHz wireless chip to complete the broadcast.

[0079] Unicast: Typically used for a wireless unit to send a request to a host, or for a host to send a command to a wireless unit. Taking turning on a microphone as an example: When a participant wants to speak, they press the microphone (MIC) button on the wireless unit. The 433MHz wireless chip sends a request data frame to the host. The host determines that speaking is permitted and sends back a confirmation data frame, recording the current status of the wireless microphone unit locally. After receiving the confirmation data frame, the wireless unit turns on the host's wireless UHF audio module and changes the icon and indicator light to show that speaking is allowed. One unicast communication session ends here. Unicast communication is generally one-way. For example, when a wireless unit sends a check-in result, when the unit's check-in button is pressed, it sends a wireless data frame to the host, informing the host that it has checked in. The host application layer receives this information, updates its local check-in information table, and the process is complete.

[0080] This invention combines a wireless UHF audio transmission module and a 433MHz wireless module, integrating both speaking and network management functions. It enables meeting management functions that traditional wireless UHF conferencing systems cannot achieve, greatly enhancing the functionality of wireless UHF conferencing systems.

[0081] In the above embodiment, preferably, the host broadcasts an interactive command to all wireless microphone units, the display module of the wireless microphone unit displays the corresponding prompt information, and sends the button trigger signal to the host. The specific process includes:

[0082] The host broadcasts a check-in command to all wireless microphone units. The display module of each wireless microphone unit shows the corresponding check-in information. After a wireless microphone unit presses the check-in button, it unicasts a check-in data frame, sending the button's trigger signal back to the host. The host receives and saves the unit's check-in information. After obtaining the check-in information from each unit sequentially, the host can tally the check-in results. The host can end the check-in process by setting a countdown timer or manually ending it.

[0083] Similar to the check-in process described above, the host broadcasts a voting command to all wireless microphone units. The display modules of the wireless microphone units display the corresponding voting information and send the button trigger signal to the host.

[0084] In the above embodiments, preferably, the host computer sets different conference speaking modes through a background application. The conference speaking modes include free mode, first-in-first-out mode, voice control mode, and request mode.

[0085] In free mode, each wireless microphone unit speaks when triggered and stops speaking when triggered again after it has finished speaking;

[0086] In first-in-first-out mode, the host limits the number of wireless microphone units that can be turned on at the same time, and adds a new wireless microphone unit after the first wireless microphone unit that was turned on is turned off;

[0087] In voice control mode, the wireless microphone unit that detects someone speaking will turn on immediately;

[0088] In request mode, the wireless microphone unit first sends a unicast request to the host to speak. The host forwards this request to the chairman unit via unicast. The chairman unit determines whether speaking is permitted and sends this permission or denial information back to the host. The host then sends a data frame to the requesting unit. After receiving the data frame, the unit decides whether to turn on the microphone, completing the request to speak process. Throughout the entire process, all 433MHz wireless communication is unicast communication.

[0089] Specifically, for ease of management, each wireless microphone unit needs to be assigned a number. The host sends a broadcast data frame to issue a unit number (ID) assignment command; each wireless microphone unit receives this command, clears its existing ID information, and sends a number request via unicast; the host allocates an available ID number and sends a unicast data frame to that wireless microphone unit; the wireless microphone unit updates its ID number upon receiving the data. Generally, the host's ID allocation strategy is sequential numbering, assigning ID numbers to the wireless microphone unit that sends the request first, starting from number 1 and incrementing sequentially. Since each wireless microphone unit joins the host's network after the system boots up, the host can determine the current number of wireless microphone units. Therefore, the numbering process can end once the total number of wireless microphone units is reached.

[0090] In the above embodiment, preferably, when the chairman unit triggers the priority button, the chairman priority speaking information is sent to the host. The host then sends a command to all other active wireless microphone units to disable them, allowing only the chairman unit to speak. Throughout the entire process, all 433MHz wireless communication is unicast communication.

[0091] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An Internet of Things system suitable for wireless conferencing, characterized in that, It comprises a host terminal and a wireless microphone unit; The host terminal comprises a host and a background application program, the host comprises a host processor, a host wireless U segment audio module and a host wireless chip, the host wireless U segment audio module and the host wireless chip are connected with the host processor respectively, the host wireless U segment audio module is used for receiving audio signals, and the host wireless chip is used for constructing network communication based on 802.15.4 protocol with the wireless microphone unit, and the network communication adopts a star network structure; The background application program is connected with the host processor and is used for controlling conference progress and setting related parameters; The wireless microphone unit comprises a wireless U segment audio sending module, a branch wireless chip and a branch display module, the branch wireless chip is used for receiving control instructions sent by the host wireless chip, the host wireless chip and the branch wireless chip construct a non-beacon mode network based on 802.15.4 protocol, the non-beacon mode is configured as asynchronous transmission, so that the wireless microphone unit does not need to send data synchronously, the wireless U segment audio sending module is used for collecting voice signals according to the control instructions and sending the collected voice signals to the host wireless U segment audio module, and the branch display module is used for displaying corresponding conference information according to the control instructions; The host wireless chip detects wireless signals of the current environment as a coordinator, sets a working frequency point and sends broadcast signals at regular time to wait for network access requests of the wireless microphone unit; The host wireless chip establishes data communication with the wireless microphone unit corresponding to the current network access request according to the received network access request if it is judged as a legal access device.

2. The IoT system suitable for wireless conferencing according to claim 1, wherein, The host terminal further comprises a host display module and a host key module, the host display module is used for displaying conference information of the wireless conference, and the host key module is used for setting and adjusting conference information through touch instructions. 3.The IoT system suitable for wireless conferencing according to claim 1, wherein, The wireless microphone unit further comprises a branch unit key, the branch unit key is connected with the branch wireless chip and sends a trigger signal to the host wireless chip through the branch wireless chip when being triggered, and the host processor realizes conference interaction functions according to the trigger signal. 4.The IoT system suitable for wireless conferencing of claim 1, wherein, The host wireless chip and the branch wireless chip are 433 MHz wireless chips. 5.The IoT system for wireless conferencing of claim 1, wherein, Each wireless microphone unit is pre-set with an identification number and a network address, and the host and each wireless microphone unit exchange data packets including the identification number and the network address of the corresponding wireless microphone unit in the data communication process. 6.A wireless conference communication method based on an Internet of Things system, characterized in that, The application of the Internet of Things system suitable for wireless conference as claimed in any one of claims 1 to 5 comprises: The host wireless chip of the host terminal detects wireless signals of the current environment, sets a working frequency point and sends broadcast signals at regular time according to pre-set network identification numbers and network addresses; The branch wireless chip of the wireless microphone unit detects the broadcast signals and sends network access requests to the host wireless chip according to network identification numbers and network addresses of the broadcast signals; The host wireless chip of the host terminal detects wireless signals of the current environment, sets a working frequency point and sends broadcast signals at regular time according to pre-set network identification numbers and network addresses; The branch wireless chip of the wireless microphone unit detects the broadcast signals and sends network access requests to the host wireless chip according to network identification numbers and network addresses of the broadcast signals; The host analyzes the network access request data packet and sends a network access confirmation data packet to the slave wireless chip to complete the data network interaction with the corresponding wireless microphone unit after the host receives a valid network access request from the master wireless chip; The host broadcasts an interaction instruction to all wireless microphone units, the display module of the wireless microphone unit displays corresponding prompt information, and the trigger signal of the key is sent to the host; When the speaking key of the wireless microphone unit is triggered, the corresponding trigger signal is sent to the host, and the host forwards it to the preset chairman unit. According to the trigger key of the chairman unit, the speaking of the wireless microphone unit is allowed or prohibited. 7.The wireless conference communication method based on the Internet of Things system according to claim 6, wherein, The host broadcasts an interaction instruction to all wireless microphone units, the display module of the wireless microphone unit displays corresponding prompt information, and the trigger signal of the key is sent to the host, and the specific process includes: The host broadcasts a check-in command to all wireless microphone units, the display module of the wireless microphone unit displays corresponding check-in information, and the trigger signal of the key is sent to the host; The host broadcasts a voting command to all wireless microphone units, the display module of the wireless microphone unit displays corresponding voting information, and the trigger signal of the key is sent to the host. 8.The wireless conference communication method based on the Internet of Things system according to claim 6, wherein, The host sets different conference speaking modes through a background application program, and the conference speaking modes include a free mode, a first-in first-out mode, a sound control mode, and an application mode; In the free mode, each wireless microphone unit speaks when triggered, and stops speaking when triggered again after speaking is finished; In the first-in first-out mode, the host limits the number of simultaneously opened wireless microphone units, and adds new wireless microphone units after the first opened wireless microphone unit is closed; In the sound control mode, the wireless microphone unit that is speaking is opened immediately; In the application mode, the corresponding wireless microphone unit is opened after sending an application to the preset chairman unit and obtaining permission. 9.The wireless conference communication method based on the Internet of Things system according to claim 8, wherein, When the chairman priority key of the chairman unit is triggered, chairman priority speaking information is sent to the host, the host closes all other opened wireless microphone units, and only allows the chairman unit to speak.

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