Table of Contents

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A brief history of WiFi

How do WiFi networks work?

WiFi module

 1.Basic components of Wi-Fi module

   2.Types of Wi-Fi modules

   3.Wi-Fi module selection

   4.Application fields of Wi-Fi module

   5.Integration and connection of Wi-Fi modules

   6.Markets and Suppliers of Wi-Fi Modules

   7.Development and debugging of Wi-Fi modules

   8. Working principle of WiFi module

   9. WiFi module advantages and features

  10. Wifi Module vs Zigbee Module vs Bluetooth Module

Wifi Repeater

Home Wifi Router

WiFi  FAQs

A brief history of WiFi

WiFi, or wireless LAN, is a wireless communications technology that allows devices to connect to each other without traditional network cables. Here are the highlights of a brief history of WiFi:

: The WiFi Alliance was established, marking the beginning of WiFi technology.

: The IEEE 802.11b standard is released, supporting higher data transmission rates, up to 11Mbps.

: The IEEE 802.11n standard is released, supporting higher data transmission rates and longer coverage, up to 600Mbps.

: The IEEE 802.11ax standard is released, also known as WiFi 6, allowing more devices to connect simultaneously and providing higher data transfer rates and better network performance.

: The IEEE 802.11be standard is released, also known as WiFi 7. The introduction of CMU-MIMO technology can support up to 16 data streams. In addition to the traditional 2.4GHz and 5GHz frequency bands, WiFi 7 will also support the 6GHz frequency band. , and the three frequency bands can work simultaneously.

How do WiFi networks work?

WiFi (wireless LAN) networks use radio waves to communicate between devices. How WiFi networks work involves wireless communication between devices, allowing them to transfer data without the need for a physical connection. This allows users to conveniently connect to the Internet at home, office or other locations. Here's how WiFi networks basically work:

Signal transmission: There is a main device in the WiFi network, usually a router or access point, which is responsible for transmitting WiFi signals. This device connects to the Internet and acts as a portal to the network.

Device connection: Devices in the WiFi network, such as smartphones, computers, tablets, etc., are equipped with WiFi adapters. When these devices are within range of a WiFi signal, they can scan for and choose to connect to available WiFi networks.

Establishing a connection: Once the device selects a WiFi network to connect to, it will attempt to establish a connection with the router or access point. This usually requires entering the correct WiFi password for authentication.

Data transfer: Once the connection is established, data can be transferred between devices over the WiFi network. This includes data transfer from the device to the Internet, as well as communication between devices within the network.

Frequency Band Selection: WiFi operates in different frequency bands such as 2.4GHz and 5GHz. Modern WiFi devices often support dual-band, allowing you to select the best band to optimize performance.

WiFi protocol: WiFi uses specific communication protocols, such as 802.11n, 802.11ac, 802.11ax, etc. These protocols specify the rules and rates for data transmission.

Encryption and Security: WiFi networks typically use encryption protocols, such as WPA3, to secure data transmissions to prevent unauthorized access.

Routing and packet processing: A router or access point is responsible for managing data traffic within a WiFi network, delivering packets to the correct target device.

WiFi Module

Wi-Fi module is a hardware device that integrates Wi-Fi communication functions, usually including Wi-Fi chips, antennas, connection and control circuits. 

Basic components of WiFi module

Wi-Fi chip: Includes radio frequency (RF) front-end and digital signal processing (DSP) unit, responsible for the core functions of Wi-Fi communication.  

Antenna: Used to send and receive Wi-Fi signals, and its design and performance directly affect signal strength and coverage.  

Connection and control circuit: Provides the interface between the module and other devices (such as microcontrollers, processors) and contains the logic to control Wi-Fi communication.

Types of WiFi modules

Standard Wi-Fi module: Provides basic Wi-Fi connection functions and is suitable for general applications.  

Wi-Fi low-power module: For low-power applications, some power consumption optimizations in the Wi-Fi 6 standard (802.11ax) are usually adopted.  

Embedded Wi-Fi module: Integrated into other devices or systems to provide wireless connectivity capabilities.

WiFi module selection

Transmission rate requirements: Select modules that support the corresponding Wi-Fi standards according to application requirements, such as 802.11n and 802.11ac.  

Power consumption: For low-power devices, choose Wi-Fi low-power modules.  

Coverage: You need to consider the range of signal coverage and choose single-frequency or dual-frequency modules.  

Device connection density: Some modules are capable of handling more device connections, making them suitable for large-scale deployments.

Application fields of WiFi module:

Internet of Things (IoT): Wi-Fi modules are widely used in IoT devices to provide interconnection and remote control functions. 

Home automation: Used to connect smart home devices, such as smart lamps, cameras, thermostats, etc. 

Industrial applications: Provide reliable wireless connectivity in industrial automation and monitoring systems. 

Consumer Electronics: Used in smartphones, tablets, smart TVs and other devices.

Integration and connection of WiFi modules

The integration and connection of WiFi modules usually involves connecting the Wi-Fi module with the main controller (such as microcontroller, microcontroller) to achieve data exchange and control. The following is the general integration and connection process:
1. Hardware connection:

Power connection: Wi-Fi modules usually require a power supply. Make sure to provide the module with the correct supply voltage and current.
Serial port connection: The Wi-Fi module usually communicates with the main controller through the serial port (UART). Connect the TX (transmit) pin of the Wi-Fi module to the RX (receive) pin of the main controller and vice versa.
GPIO pins: Some Wi-Fi modules may require additional GPIO pins for control and configuration.

2. Software integration:

Drivers: Make sure you have the appropriate WiFi module drivers on the main controller. This may be an official driver provided by the Wi-Fi module vendor or an open source driver maintained by the developer community.
Communication protocol: Understand the communication protocol between the Wi-Fi module and the main controller, such as the serial communication protocol. This typically includes commands, data formats, etc.

3. Initialization and configuration:

Boot Process: Upon startup, the WiFi module may need to be initialized and configured. This can be done by sending specific commands and configuration data.
SSID and password configuration: The WiFi module needs to know the SSID and password of the Wi-Fi network you want to connect to. This information is usually configured through commands or APIs.

4. Data exchange:

Data sending and receiving: Once connected to the WiFi network, the main controller can send and receive data through the Wi-Fi module. This may involve packaging the data into an appropriate format and transmitting it using the Wi-Fi module's communication protocol.

5. Security and Authentication:

 Encryption settings: If the Wi-Fi network requires encryption, ensure that the communication between the Wi-Fi module and the main controller is secure. Use security protocols like WPA3 or WPA2.
Authentication: When connecting to a Wi-Fi network, you may be required to provide appropriate authentication information, such as a certificate or key.

6. Debugging and testing:
Logging: Enable logging for the Wi-Fi module and main controller to view detailed information while debugging.
Tool usage: Use the tools provided by the Wi-Fi module or third-party tools to monitor and debug Wi-Fi connections.

7. Power management:

 Low Power Mode: If the Wi-Fi module supports low power mode, consider putting it to sleep when not needed to save power.

8. Update and maintenance:

 Firmware Upgrades: Regularly check for firmware upgrades for your Wi-Fi module for performance improvements and security fixes.

9. Follow best practices:

 Documentation and Specifications: Follow the documentation and specifications provided by the Wi-Fi module vendor to ensure proper integration and connection

Markets and Suppliers of WiFi Modules

The Wi-Fi module market is highly competitive, and new suppliers and products may continue to emerge as technology develops. When choosing a Wi-Fi module supplier, factors such as product performance, cost, support, and reliability need to be considered. The following are some of the major Wi-Fi module market suppliers:

Espressif Systems:
Product series: ESP, ESP32, etc.
Features: Espressif Systems is a company that provides low-cost, high-performance Wi-Fi modules. The ESP and ESP32 series are widely used in IoT and embedded systems.

Broadcom (Cypress Semiconductor):
Product series: Cypress Wi-Fi/Bluetooth Combo module, etc.
Features: Broadcom is a leading global semiconductor company whose Wi-Fi/Bluetooth Combo modules are widely used in consumer electronics and industrial applications.

Qualcomm Technologies:
Product series: Qualcomm QCA series modules, etc.
Features: Qualcomm is a world-leading communications technology company whose Wi-Fi modules are widely used in mobile devices, the Internet of Things, and automotive fields.

Texas Instruments:
Product Series: TI SimpleLink Wi-Fi Modules, etc.
Features: Texas Instruments offers a range of Wi-Fi modules suitable for industrial, automotive and home applications.

Microchip Technology:
Product series: WINC Wi-Fi module, etc.
Features: Microchip Technology offers a variety of Wi-Fi modules for connecting IoT devices and embedded systems.

Murata Manufacturing:
Product Series: Murata Wi-Fi Module, etc.
Features: Murata is a Japanese company that offers a range of Wi-Fi modules suitable for a variety of wireless communication applications.

u-blox:
Product series: u-blox Wi-Fi modules, etc.
Features: u-blox is a Swiss company that offers a range of Wi-Fi modules for in-vehicle communications, industrial applications and the Internet of Things.

NXP Semiconductors:
Product Series: NXP Wi-Fi Module, etc.
Features: NXP Semiconductors provides Wi-Fi modules, which are widely used in automotive, smart home and industrial fields.

Development and debugging of Wi-Fi modules

The development and debugging of Wi-Fi modules are key steps to ensure that the module operates properly and meets application requirements. Here are some suggestions and practices to help you be successful when developing and debugging Wi-Fi modules:

Develop Wi-Fi module:

Selection and planning:
Choose the Wi-Fi module that suits your application needs, considering factors such as transmission rate, power consumption, and coverage.
Plan Wi-Fi network topology, including device connections, network structure, and security.

Hardware integration:
Make sure the Wi-Fi module's power, antenna, and control pins are connected correctly.
Read the Wi-Fi module's hardware reference manual for proper hardware connections and configuration.

Driver and software development:
Obtain and configure the driver for your Wi-Fi module.
Develop appropriate application layer software to implement functions such as Wi-Fi connection, data transmission, and network management.

Network configuration and security:
Configure the SSID and password required for the Wi-Fi module to connect to the Wi-Fi network.
Consider network security and choose appropriate encryption and authentication methods, such as WPA3.

Tested and verified:
Perform a basic connection test to ensure that the Wi-Fi module can properly connect to the Wi-Fi network.
Conduct performance testing, including testing of data transfer rates, latency, and stability.

Debugging the Wi-Fi module

Logging:
Enables the logging feature of the Wi-Fi module to record events related to Wi-Fi connections and communications.
Use logging to identify problems and debug them.

Signal quality check:
Use Wi-Fi signal quality check tools to check signal strength, signal-to-noise ratio, and interference.
Optimize Wi-Fi module location and antenna layout to improve signal quality.

Network protocol analysis:
Use a network protocol analysis tool such as Wireshark to monitor the communication between the Wi-Fi module and the network.
Analyze data packets to check for abnormal or erroneous communications.

Error handling and exception conditions:
Implement an error handling mechanism to handle abnormal situations such as connection loss and authentication failure.
Log and report error messages to locate and resolve issues faster.

Low power optimization:
If the Wi-Fi module supports low-power mode, test and optimize the low-power solution.
Ensure that the Wi-Fi module goes to sleep when inactive to save power.

Firmware upgrade:
Regularly check for firmware updates for your Wi-Fi module for performance improvements and fixes for known issues.
When performing a firmware upgrade, be sure to back up your current configuration and data.

Remote debugging:
If possible, implement remote debugging capabilities so that the status and performance of the Wi-Fi module can be monitored remotely.
Use remote debugging tools to reduce the need for on-site debugging.

When developing and debugging Wi-Fi modules, continuous testing, recording, and analysis are keys to success. Make sure you understand the Wi-Fi module's documentation and specifications and adjust and optimize it for your specific application needs.

Working principle of WiFi module

RF signal processing: The WiFi module receives RF signals and processes them through the RF front-end module.

Digital signal processing: The processed RF signals are converted into digital signals and further processed by the WiFi chip.

WiFi protocol stack: The WiFi module has a built-in WiFi protocol stack, which is responsible for managing all aspects of WiFi communication, including data transmission, security, and network management.

Antenna: The WiFi module’s antenna is used to send and receive WiFi signals.

Control Interface: WiFi modules typically communicate with a host device (such as a microcontroller) through a serial port or other control interface to receive commands and send data.

WiFi module advantages and features

WiFi modules have many advantages and features in the field of wireless communications, making them a popular choice for a wide range of devices and scenarios. Here are some of the main benefits and features of WiFi modules:

1. Wireless connection: The WiFi module provides wireless connection capabilities, enabling the device to communicate with the wireless network through the WiFi protocol. This eliminates reliance on traditional network cables, providing more flexible layout and mobility.

2. High-speed transmission: The WiFi module supports high-speed data transmission, allowing devices to send and receive data at a faster speed. Different WiFi standards offer different speeds, ranging from tens of megabits per second (Mbps) to thousands of Mbps.

3. Widely used: WiFi modules are widely used in various devices, including smartphones, tablets, laptops, IoT devices, embedded systems, smart home devices, etc. This allows these devices to easily communicate with the internet and other devices.

4. Easy to integrate: WiFi modules usually have designs that simplify integration, and developers can connect to host devices through standard interfaces (such as UART, SPI, I2C). This makes it relatively easy to integrate WiFi in a variety of embedded systems.

5. Standardized protocols: WiFi communication uses standardized protocols, such as the IEEE 802.11 series, to ensure interoperability and compatibility. This enables WiFi modules from different manufacturers to work together on the same network.

6. Wide coverage: WiFi technology supports a large coverage area and can cover different environments such as homes, businesses, and public places. Multiple WiFi devices can coexist within the same area.

7. Strong ecosystem: WiFi technology has a huge ecosystem, including the WiFi Alliance, manufacturers, development communities, etc. This means extensive documentation, tools and support resources are available, simplifying the development and maintenance process.

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8. Security functions: WiFi modules usually support various security functions, such as WPA3 encryption, virtual private network (VPN) support, etc., to ensure the security of data transmission.

WIFI Module vs Zigbee Module vs Bluetooth Module

WiFi module, Zigbee module and Bluetooth module are three different wireless communication technologies, which differ in application areas, transmission rates, power consumption, device connection density, etc. Below is a comparison of WiFi modules, Zigbee modules and Bluetooth modules.

Wifi Repeater

WiFi repeaters, also known as range extenders or signal boosters, are devices that improve and extend signal coverage. wireless network. These devices overcome the limitations of typical WiFi routers by collecting current WiFi signals, boosting them, and retransmitting them to locations where signal strength is poor or non-existent. WiFi repeaters are essential for improving the range and performance of your wireless network, especially in large homes, businesses, or places with various obstacles that can interfere with WiFi signals. They work by connecting to an existing WiFi network and rebroadcasting the signal, essentially providing an expanded coverage area.

Home Wifi Router

A home WiFi router is a device used to provide wireless network connectivity in a home network. It typically acts as a hub in a network, spreading Internet connectivity to various devices within the home. Here is some basic information about your home WiFi router:

Related article :

is Now the Time to Replace Your WiFi 6 Router?

Functions and features:

WiFi Connection: Provides wireless connectivity, allowing various devices (such as smartphones, tablets, laptops, etc.) to access the Internet through WiFi.

Wired ports: Typically have multiple Ethernet ports for wired devices (such as desktop computers, game consoles, network printers, etc.) to connect to.

Routing function: With routing function, it can manage network traffic, assign IP addresses and provide network security.

Dual-band support: Most modern home routers support dual-band (2.4GHz and 5GHz) to provide greater network bandwidth and better performance.

Security: Provides basic network security features such as WPA3 encryption, firewall, guest network, etc.

QoS (Quality of Service): Equipped with QoS functions to optimize network performance and ensure high-quality services for critical applications (such as video streaming, online games).

Management interface: Provides a web interface or mobile application for user management and setting router options.

Upgrades and automatic updates: Equipped with firmware upgrade capabilities to ensure system security and provide the latest performance and functionality.

WiFi FAQs

Which WiFi module is best?

Choosing the most suitable WiFi module depends on the specific application needs. Here are some considerations:

Transmission rate requirements: If high-speed data transmission is required, choose a module that supports higher WiFi standards (such as 802.11ac).

Coverage: If you need a larger network coverage, a dual-band WiFi module (supports 2.4GHz and 5GHz) may be more suitable.

Power consumption: For low-power applications, you can consider using WiFi low-power modules, such as some power consumption optimizations introduced in the WiFi 6 standard (802.11ax).

Device connection density: For scenarios that need to support a large number of device connections, choose a WiFi module that can handle high device connection density.

Cost: Consider the cost of the module to ensure it fits within the project budget.

Why is WiFi slow?

Possible reasons include:

Signal interference: Other wireless devices, electronic devices, walls, etc. may interfere with WiFi signals.

Too far away from the router: If the device is too far away from the WiFi router, the signal may be attenuated.

Too many connected devices: Too many connected devices can crowd the network and affect speeds.

Congested Bands: In crowded WiFi bands, you may experience interference issues.

How to improve WiFi signal strength?

Adjust router position: Place the router in a more central location to avoid objects blocking the signal.

Use Signal Amplifiers/Repeaters: Use signal amplifiers or repeaters to boost the signal within your coverage area.

Update your router: Use a new router that supports a stronger signal.

Choose the appropriate WiFi band: Switch to a less crowded WiFi band, such as 5GHz.

Check the device and driver: Make sure the WiFi adapter and driver for the connected device are up to date.

Why is the WiFi connection unstable?

Signal Interference: Sources of interference can cause an unstable connection.

Router issues: The router may need to be restarted or the firmware upgraded.

Distance issues: Devices that are too far away from the router can cause an unstable connection.

IP address conflict: Make sure there are no IP address conflicts in the LAN

How to secure WiFi networks?

Encrypted network: Enable WiFi network encryption, using WPA3 or WPA2 standards.

Strong passwords: Set strong passwords and avoid passwords that are easy to guess.

Change default credentials: Modify the WiFi network name (SSID) and administrative credentials.

Enable MAC address filtering: Restrict connected devices to only allow known devices to connect.

Why is WiFi connection fast but unstable?

Signal Interference: Strong signal speeds may cause interference from other wireless devices.

Device conflicts: Multiple devices competing for the same spectrum can lead to instability.

Router issues: Your router might need an update or have a hardware issue.

Why does WiFi have no signal in some areas?

Limited signal range: WiFi signal coverage is limited by obstacles, walls, or other interference.

Band issues: 2.4GHz signals are better at penetrating obstacles, while 5GHz signals offer higher speeds over short distances.

Introduction

With the rapid development of Internet of Things (IoT) technology, WiFi modules have become a critical component for connecting devices to the internet, and their market demand is growing steadily. According to a report by the market research firm verifiedmarketresearch, the global WiFi module market is estimated to reach USD 10.1 Billion by , growing at a CAGR of 9.1% from to . This growth trend is primarily driven by the rapid development of sectors such as smart homes, industrial automation, and smart cities. This article will introduce the top ten WiFi module manufacturers worldwide and their application solutions, helping readers understand the characteristics and advantages of each brand.

1. Broadcom 

Broadcom is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in smartphones, tablets, laptops, and other consumer electronics. Broadcom's BCM43xx series modules are known for their high performance and low power consumption, making them ideal for devices requiring high throughput and stable connections.

Recommended Product: BCM

The BCM is a dual-mode module that integrates Bluetooth 5.0 and WiFi 5 (802.11ac), suitable for devices that need to support both Bluetooth and WiFi. This module features low power consumption, high integration, and high performance, and is widely used in smartphones, tablets, and wearable devices.

2. Qualcomm 

Qualcomm is a well-known global semiconductor and communications technology company, with its WiFi modules widely used in mobile devices and IoT devices. Qualcomm's WiFi modules are renowned for their exceptional performance and broad compatibility, supporting the latest WiFi standards and Bluetooth technologies.

Recommended Product: QCA

The QCA is a dual-mode module that integrates WiFi 4 (802.11n) and Bluetooth 4.1, suitable for smart homes, smart wearables, and IoT gateways. This module features low power consumption, high integration, and high performance, providing stable wireless connectivity.

3. Texas Instruments (TI)

Texas Instruments is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in industrial automation, smart homes, and smart cities. TI's WiFi modules are known for their high reliability and low power consumption, making them suitable for devices that require long-term operation.

Recommended Product: CC

The CC is a single-chip solution that integrates WiFi and a microcontroller, suitable for IoT devices. This module features low power consumption, high integration, and high performance, providing stable wireless connectivity. The CC is widely used in smart homes, industrial automation, and smart cities.

4. Silicon Labs 

Silicon Labs is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in smart homes, industrial automation, and smart cities. Silicon Labs' WiFi modules are known for their high reliability and low power consumption, making them suitable for devices that require long-term operation.

Recommended Product: EFR32MG12

The EFR32MG12 is a single-chip solution that integrates WiFi and a microcontroller, suitable for IoT devices. This module features low power consumption, high integration, and high performance, providing stable wireless connectivity. The EFR32MG12 is widely used in smart homes, industrial automation, and smart cities.

5. Realtek 

Realtek is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in consumer electronics, smart homes, and industrial automation. Realtek's WiFi modules are known for their high performance and low cost, making them suitable for devices that require high cost-effectiveness.

Recommended Product: RTLDS

The RTLDS is a dual-mode module that integrates WiFi and Bluetooth, suitable for smartphones, tablets, and wearable devices. This module features high performance, low power consumption, and low cost, and is widely used in consumer electronics and smart home devices.

6. Marvell

Marvell is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in consumer electronics, smart homes, and industrial automation. Marvell's WiFi modules are known for their high performance and low power consumption, making them suitable for devices that require high throughput and stable connections.

Recommended Product: AVASTAR 88W

The AVASTAR 88W is a dual-mode module that integrates WiFi and Bluetooth, suitable for smartphones, tablets, and wearable devices. This module features high performance, low power consumption, and low cost, and is widely used in consumer electronics and smart home devices.

7. MediaTek 

MediaTek is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in smartphones, tablets, and smart home devices. MediaTek's WiFi modules are known for their high performance and low cost, making them suitable for devices that require high cost-effectiveness.

Recommended Product: MT

The MT is a single-chip solution that integrates WiFi and a microcontroller, suitable for IoT devices. This module features low power consumption, high integration, and high performance, providing stable wireless connectivity. The MT is widely used in smart homes, industrial automation, and smart cities.

8. Cypress Semiconductor

Cypress Semiconductor is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in consumer electronics, smart homes, and industrial automation. Cypress' WiFi modules are known for their high performance and low power consumption, making them suitable for devices that require long-term operation.

Recommended Product: CYW

The CYW is a dual-mode module that integrates WiFi and Bluetooth, suitable for smartphones, tablets, and wearable devices. This module features high performance, low power consumption, and low cost, and is widely used in consumer electronics and smart home devices.

9. Microchip Technology 

Microchip Technology is a leading global semiconductor company that offers a wide range of WiFi modules. Its WiFi modules are widely used in smart homes, industrial automation, and smart cities. Microchip's WiFi modules are known for their high reliability and low power consumption, making them suitable for devices that require long-term operation.

Recommended Product: WFI32E01

The WFI32E01 is a single-chip solution that integrates WiFi and a microcontroller, suitable for IoT devices. This module features low power consumption, high integration, and high performance, providing stable wireless connectivity. The WFI32E01 is widely used in smart homes, industrial automation, and smart cities.

10. EBYTE 

EBYTE is a high-tech company specializing in IoT applications, offering a wide range of WiFi modules. Its WiFi modules are widely used in smart homes, industrial automation, and smart cities. EBYTE's WiFi modules are known for their high reliability and low power consumption, making them suitable for devices that require long-term operation.

Recommended Product: E103-W05

The E103-W05 is a low-cost, high-performance 2.4GHz WiFi module suitable for various IoT applications. This module supports multiple working modes and communication methods, featuring low power consumption, high transmission rates, and ease of configuration. The E103-W05 is widely used in smart homes, industrial remote control and telemetry, smart buildings, and smart cities.

This article has introduced the top ten WiFi module manufacturers worldwide and their recommended products. Each brand has its unique strengths and suitable applications. Choosing the right WiFi module requires considering specific application needs and budget comprehensively. We hope this article provides valuable reference information for readers selecting WiFi modules.

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