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Shenzhen Ofeixin Technology Co., Ltd
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SHENZHEN OFEIXIN TECHNOLOGY Co.,Ltd. founded in 2014, with office located in Shenzhen China, and factory located at Liuyang Town ChangSha City, HuNan Province,covering an area of 39,000㎡,is one of the earliest and most proficient manufacturing enterprises which integrate R&D, production and sales as a whole in the field of high-speed wireless network.SHENZHEN OFEIXIN TECHNOLOGY Co.,Ltd. is dedicated to providing customers with perfect IOT connection solutions.With many years of experience that ...
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Operation Principle/AP Mode/STA Mode of WiFi Module
Operation Principle of WiFi Module: A WiFi module typically consists of two main components: a wireless chipset and a microprocessor. The wireless chipset is responsible for handling the transmission and reception of wireless signals, while the microprocessor manages and controls various functions of the WiFi module. During data transmission, the wireless chipset uses radio waves to interact with signals. By carefully selecting frequencies and channels, it communicates with other devices. When data needs to be transmitted, the wireless chipset converts it into digital signals, which are then transmitted through the antenna. The receiving-side wireless chipset converts the received signal back into digital format and passes it to the microprocessor for further processing. The microprocessor is responsible for decoding, decryption, and a series of other operations, ultimately transferring the processed data to the device's operating system.   WiFi Module Operating Modes: AP Mode (Access Point Mode): Also known as hotspot mode. In this mode, the WiFi module acts as an access point, similar to the functionality of a router. It creates a wireless network, allowing other devices to connect to this network, much like setting up a Wi-Fi hotspot in a home or office environment. AP mode is often used to establish direct connections, enabling multiple mobile devices to connect to a central device, or to create temporary wireless networks. In AP mode, devices like smartphones, tablets, and computers can directly connect to the module, facilitating user control over these devices.                                                                                                                                                STA Mode (Station Mode): STA mode turns the device into a client of an existing wireless network. In this mode, the device connects to an already existing wireless network, just like a smartphone or laptop connects to a home Wi-Fi router. STA mode allows the device to connect to an existing wireless network, enabling access to the internet or communication with other devices. In STA mode, the device becomes a node on the network, facilitating data exchange and communication with other devices. Please note that the translations might not be perfectly aligned with technical terminology in English, as they are directly translated from the provided Chinese text.   All in all, the WiFi module transmits and receives signals through the wireless chip, and can fully manage and control various functions. AP mode is used to establish a direct connection or temporary network, while STA mode enables devices to connect to existing wireless networks for Internet access and communication between devices.  
Application of the 8121N-UH WiFi Module
With the continuous advancement of technology, the application scope of unmanned aerial vehicles (UAVs) is expanding rapidly and becoming remarkably diverse. Whether it's during takeoff, flight, hovering, or return, precise wireless remote control technology is indispensable at every stage of UAV operations. Additionally, wireless video transmission is a crucial requirement during UAV flights, giving rise to a pivotal challenge: ensuring that transmitted images are not only clear and reliably real-time but also guaranteeing seamless video transmission.   In the realm of UAV technology, image transmission plays a pivotal role, with wireless image transmission technology serving as its core. If the flight control system is considered the UAV's "brain," then the image transmission system can be likened to its "eyes," responsible for capturing and transmitting environmental visuals. Within the domain of wireless communication video transmission, WiFi modules are regarded as the "visual neurons" of UAV image transmission solutions. In light of this, Ofeixin , a company specialized in wireless module development, has dedicated its efforts to the research and development of wireless modules, resulting in the introduction of the 8121N-UH wireless communication video transmission WiFi module.   Built upon the foundation of the 802.11 wireless communication standard, the Ofeixin 8121N-UH module boasts several outstanding features. Notably, it offers a transmission range of up to 1 kilometer, satisfying the aerial photography needs of a wide range of users. Furthermore, the module supports flexible networking, excels in interference resistance, and is characterized by exceptional sensitivity. Compared to other WiFi module types, the 8121N-UH stands out not only due to its low cost but also due to its impressive cost-effectiveness. These attributes make it especially suitable for scenarios that demand long-distance and high-speed transmission, including UAV control, security surveillance, smart buildings, precision agriculture, robotics, and more.   I firmly believe that as UAV applications continue to proliferate, the significance of efficient wireless communication video transmission technology cannot be overstated. The introduction of the Ofeixin 8121N-UH module provides robust support to UAV image transmission solutions, facilitating the realization of clear, stable, and efficient image transmission across various fields. This, in turn, paves the way for a more expansive scope of innovation and development within the UAV technology landscape.
Application of 8121N-UH in Wireless HDMI Extender Products
With the development of wireless transmission technology, high-definition wireless HDMI extender products have begun to be applied to various scenes in life. It is widely used for home high-definition video images at the same frequency, in classroom education and conference office, as a courseware display and enterprise information display, or as a camera and other devices, the HDMI high-definition picture is wirelessly transmitted to the corresponding device for recording and broadcasting.After getting rid of the connection of the wired connection, the wireless projection screen is more convenient to use.   Wireless screencast can transmit images in real time and transmit the images to the required devices in time, providing a very convenient experience for users with different needs. In the past few years, a large number of wireless HDMI extender products have emerged on the market, but in the complex environment and long distance, 2.4G is used for transmission. Because of 2.4G interference, the quality of image transmission is greatly declined. With the 802.11 5.8g gradually becoming the mainstream in recent years, the cost of the wireless module, which is the core component of the wireless projection screen product, is greatly reduced, which makes the related wireless HDMI extender products continue to be innovated, making it suitable for various subdivisions, wireless HDMI extender can be said to have a bright future.   Oflycomm specially developed the 8121N-UH module for the wireless picture transmission field, adopting Qualcomm chip, dual antenna design, adopting 802.11 5.8G frequency band to avoid signal interference of 2.4G frequency band, power up to 19dBm (54M*2), excellent in all aspects of distance and penetration, suitable for wireless HDMI extender, long-distance wireless transmission and other fields.   At present, the performance of the market is stable, and the mainstream products with excellent transmission quality and speed generally adopt the Hisilicon main chip , and use H.264 encoding to transmit high-definition audio and video below 1080P. However, the main chip using H.265 encoding is equipped with 8121N-UH module to transmit 4K audio and video. With the increase of 4K sources, 4K wireless HDMI extender products will also become mainstream.   Due to different solutions or designs, product cost and performance will be quite different. Oflycomm has been committed to providing and assisting customers to optimize product RF solutions.    .



2020 New Selections Of SDIO WiFi Module
Before we talk the SDIO WiFi Module, let's take a quick look at the SDIO, which literally means the I/O interface of SD. SD itself is the standard for memory cards, but now we plug SD into some of the peripheral interfaces , and from that comes what we called the SDIO. It can also be said that SDIO is an interface developed on the basis of SD card. It is not only compatible with previous SD CARDS, but also can connect the external periphery through the I/O pin of SD and transmit data to these periphery through the I/O data bit on SD.   So SDIO WiFi Module, which is simply an embedded module based on the SDIO interface and compatible with wireless network standards. The built-in wireless network protocol IEEE802.11 and TCP/IP protocol stack can realize the conversion of user's main platform data from SDIO port to wireless network. Due to its fast transmission speed and good compatibility, it is widely used in all kinds of wireless smart devices. Now let's take a look at some of popular models in applications:   1.3131A-S, it is based on Hisilicon 802.11n video transmission IOT chipset Hi1131S, it supports ultra low power consumption.The data rate in WIFI 1T1R N mode is up to 150 Mbps. It had to be based on LiteOS and be worked with Hisilicon CPU, the major applications are doorbell and IP Camera. Currently, the solution of Hi3518EV20X/Hi3518EV300+Hi1131S directly accounts for more than half in low-power IPC products, and its high definition and stability have been unanimously recognized by various manufacturers all over the world.       2.3181A-S, it based on Hisilicon Hi3881 chipset, the RF performance is basically same as Hi1131S, but it can support LiteOS or Linux, which greatly simplifies the LiteOS inexperienced engineers and reduces the debugging time and development cycle. At present, the main applications included IPC and set-top box.     3.3161A-SL,it is based on Hisilicon Hi3861L chipset, it also inherits the RF performance of Hi1131S, but part of MCU subsystem is optional, which greatly reduces the software and hardware development and improves the convenience of debugging. The major applications will be low-power smart scenes (battery smart devices, such as locks, sensors, etc.) and video scenes (battery IPC).                                                                                           4.6222B-SRC, it is based on Realtek RTL8822CS chipset, for our previous upgrade of RTL8822BS, supports IEEE 802.11 a/b/g/n/ac + Bluetooth V5.0, WiFi 2T2R AC mode data rate up to 867 Mbps, compared to the previous RTL8822BS not only performance optimization, in the same market competition, cost advantage is more obvious. It is most applied for the Set Top Box, Tablet and other video transmission of high speed smart devices.                                       5.8274B-SR, it is based on Qualcomm QCA6174A-3 chipset, the performance is similar as 6222B-SRC. In previous articles we specifically mentioned the comparison between these two, they both support MU-MIMO. The big difference is that the operating temperature is more wider, which is particularly important in some industrial grade applications or complex environments.       In addition to the above mentioned based on Hisilicon/Realtek/Qualcomm SDIO WiFi module, as well as based on MTK same ones. Whether it's 2.4 G WiFi or 2.4 G / 5.8 G dual-band WiFi, we have enough market experience and technology accumulation, to provide customers with perfect IOT solutions, more details welcome to visit our website OFLYCOMM.



New Generation HiSilicon WiFi Module
In August 2019, at Huawei Developer Conference, Huawei officially released the Lingxiao Series WiFi-iot chips, which are mainly used for home automation products. This is Huawei's connectivity solution for HiLink's smart home ecological strategy. With the chip’s latest technology, HiLink's ecological connections will be more stable, convenient and secure, which is the cornerstone of HiLink's ecological prosperity. As a leading manufacturer in China, we are specialized in providing customers with perfect Internet of Things connectivity solutions. The following will be a details of the WiFi Module which are based on HiSilicon WiFi chips.   1、Main Chip:Hi1131S Module No: 3131A-S     Introduction:Mainly used in battery-powered low-power IPC and smart doorbell, work with HI3518EV200/300 and based on LiteOS , it has been recognized by the market for its low power consumption, fast wake-up and excellent performance. Also 3131A-S has been in mass production and successfully applied in this field.   Main Features: Support IEEE 802.11b/g/n 2.4GHz support 150 Mbps in 20/40 MHZ mode Support WLAN SDIO interface Enterprise level security which can apply WPA/WPA2 certification for WiFi Operating Temperature:-30~70°C Low power dissipation   2、Main Chip:Hi3861LV100 Module No: 3161A-SL/3161H-IL     Instruction:3161A-SL is an upgrade version of 3131A-S with a wider range of applications,mainly applied in the fields of battery-powered low-power IPC, smart doorbell and smart home.   In the field of low-power video door bell and IPC, Hi3861L is worked with Hi3518EV300 to operate in LiteOS dual mode (WIFI and CPU are both based on LiteOS ). Hi3861L has a rich interface for external sensors. With an embedded MCU and power management unit, it can reach Rapid Wake and lower power consumption. Meanwhile, it simplifies product design and is conducive to rapid product development. 3161H-IL can be directly used in battery-powered low-power door locks and other smart home products.                         Main Features: Support IEEE 802.11b/g/n 2.4GHz support 72.2 Mbps in 20MHZ mode Support standard 20MHz nd 5M/10M narrow broadband, support STBC Support SDIO,SPI,I2C,UART,I2S,PWM,ADC,GPIO interfaces Module integrated 32K clock WFA WPA, WFA WPA2 personal, and WPS2.0 for Wi-Fi Built-in 352 KB SRAM and 288 KB ROM Main chipset Built-in 32bit MCU and 2 MB flash memory Operating Temperature:-40~85°C Low power dissipation   3、Main Chip:Hi3861 Module No: 3161H-I     Introduction:Hi3861 is WIFI-IOT chip, which is mainly used in the normally power supply smart home, such as white goods, home appliances, and electrical products.                             Main Features: Support IEEE 802.11b/g/n 2.4GHz support 72.2 Mbps in 20MHZ mode Support standard 20MHz nd 5M/10M narrow broadband, support STBC Support SDIO,SPI,I2C,UART,I2S,PWM,ADC,GPIO interfaces Module integrated 32K clock