Wireless transmission of images from a smartphone to a large screen has long ceased to be exotic and has become a standard for modern multimedia systems. Device users Xiaomi often face the need to demonstrate presentations, play a movie or play a game on a TV without the use of unnecessary wires. The technology Miracast allows you to duplicate the phone screen onto a compatible display with minimal delay, creating the effect of complete mirroring.
However, the interface of the shell MIUI or the new HyperOS can hide this function under different names, which causes confusion among beginners. Unlike the standard one, where the option is often placed in the quick settings panel, in smartphones the path to activation can be through the “Connection and Sharing” menu or hidden engineering menus. Understanding the principles of the protocol will help you avoid common mistakes when pairing devices. Android, where the option is often placed in the quick settings panel in smartphones Xiaomi the path to activation can be through the “Connection and Sharing” menu or hidden engineering menus. Understanding the principles of the protocol will help you avoid common mistakes when pairing devices.
In this material we will analyze in detail the algorithm of actions for activating a wireless display, consider the nuances of working with different firmware versions and offer solutions for situations when a standard connection cannot be established. You will learn how to overcome the limitations imposed by some applications and how to ensure a stable high-resolution picture.
Principles of wireless mirroring in the Xiaomi ecosystem
The technology Miracast is based on the Wi-Fi Direct standard, which means creating a direct communication channel between the smartphone and the receiving device (TV, projector or adapter) without the participation of a home router. This is a key difference from the technology Chromecastwhich requires a shared Wi-Fi network to transmit commands. In the case of Xiaomi, the system independently initiates a search for available displays that support the Wi-Fi Display protocol.
The process of encoding the video stream occurs directly on the smartphone processor. The graphics chip compresses the image in real time and transmits it over the air. That is why the quality of the picture and the presence of delays (input lag) directly depend on the performance of your Xiaomi and air traffic in the 2.4 or 5 GHz range. For games, this feature is critical, since even a slight desynchronization can ruin the experience.
It is worth noting that some services, such as Netflix or Disney+, use content protection HDCP. This may cause you to see a black screen on your TV when you try to stream a movie, but the video will play normally on your smartphone. This is not a malfunction, but a software limitation designed to protect copyright.
⚠️ Attention: When actively using Miracast, the smartphone's battery drains much faster than normal mode. It is recommended to keep the device connected to charging or have a power bank on hand, especially when broadcasting video in high definition.
The data transfer interface is MIUI optimized for working with branded TVs Mi TV, providing automatic detection and simplified pairing. However, when connecting third-party devices from Samsung, LG or Sony additional steps may be required to manually configure the device name or confirm the connection on the TV screen.
Search and activate the function in the MIUI and HyperOS settings
The first step to organize a broadcast is to discover the system utility responsible for the wireless display. Depending on the operating system version, the name of this feature may vary. In most current builds HyperOS and recent versions MIUI the tool is called “Broadcast” or “Wireless Monitor”. You can find it by lowering the notification shade and activating the corresponding icon.
If there is no icon in the quick access panel, you need to go to the deep settings menu. The standard path looks like this: open Settings, then select partition Connection and sharing. This is where all the parameters related to transferring data to external screens are concentrated. In some older firmware versions, this item may be located in the section Display.
After entering the “Broadcast” menu, the system will automatically start scanning the air. Make sure your TV is set to connection standby mode (often called Screen Mirroring, Anyview Cast, or simply Miracast in the TV source menu). As soon as the smartphone detects the display, its name will appear in the list of available devices.
- 📱 Click on the name of your TV in the list to begin pairing.
- 📺 Confirm the connection on the TV screen if prompted.
- 🔄 Wait until the connection is established, the indicator will show the status “Connected.”
- ⚙️ Use the broadcast settings menu to select screen orientation or quality.
It is important to understand that in mirroring mode, the smartphone screen rotates with the TV. If you hold your phone vertically and your TV horizontally, black bars will appear on the sides of the image. For comfortable video viewing, it is recommended to switch your smartphone to landscape mode in advance.
☑️ Check before connecting
Alternative launch methods through the engineering menu
Sometimes the standard “Broadcast” function may be hidden by the manufacturer in certain regions or not work correctly after a software update. In such cases, the engineering menu Xiaomicomes to the rescue, which allows you to forcefully activate the wireless display service. This method requires caution, but often solves the problem of a missing button in the notification shade.
To enter the hidden menu, you need to open the standard Phone application and enter a special combination of characters. The code may differ depending on the processor model and Android version, but the most universal is ##6484## or ##4636##. After entering the code, a list of tests will open where you need to find an item related to Wi-Fi Display or projection.
##6484##Inside the engineering menu, find the section WiFi Display or Projection. Activating the switch in this section forces the system display search service to start. After this, the standard “Broadcast” icon should appear in the notification panel or become active in the settings.
⚠️ Attention: Changing settings in the engineering menu that are not related to screen broadcasting may lead to unstable operation of the smartphone. Change only the parameters related to Wi-Fi Display and do not reset other calibrations.
It is also possible to launch the function through the app Wireless Display from the store Google Playif there is no system solution at all. However, the native implementation from Xiaomi always provides better stability and lower latency, since it has direct access to the Wi-Fi module drivers.
What to do if the code does not work?
If entering the code does not open the menu, your firmware version may be blocking access to engineering tests. Try installing the "Xiaomi Engineering Mode" application from third-party sources, but be aware of the security risks.
Adjusting quality settings and eliminating delays
After a successful connection, it is important to optimize the transmission parameters to achieve the best picture quality. In the broadcast menu Xiaomi additional settings are often available that allow you to adjust the resolution and frame rate. By default, the system can choose a balance between quality and smoothness, but for static images or movies, priority should be given to resolution.
Input lag is the main problem of wireless broadcasting, especially noticeable in fast-paced games. To minimize this effect, ensure that both devices operate within range 5 GHz. The 2.4 GHz frequency is highly susceptible to interference from microwave ovens, Bluetooth headsets and neighboring routers, which leads to artifacts and slowdown.
| Parameter | Recommended value | Impact on operation |
|---|---|---|
| Wi-Fi range | 5 GHz | Reduces latency and interference |
| Resolution | 1920x1080 (Full HD) | Optimal clarity balance |
| Frame rate | 60 Hz | Ensures smooth video |
| Game mode | Enabled (if available) | Priority of speed over quality |
If you notice color separation or “squares” in the image, this indicates insufficient channel bandwidth. Try moving your smartphone closer to the TV or turning off other devices that actively consume traffic on your network. Some models Xiaomi have a special “Game Mode” for broadcasting, which reduces the bitrate for the sake of response speed.
To watch movies in 4K, use a wired connection or streaming inside applications (Cast button in the player), since wireless mirroring of the entire screen rarely supports 4K@60Hz stably.
Solution common connection problems
Despite the well-functioning technology, users often encounter a situation where the smartphone does not see the TV or the connection is constantly disconnected. The first reason is usually incompatible protocol versions. Make sure that the latest firmware is installed on your TV, as manufacturers regularly update Wi-Fi Direct modules.
The second common problem is a conflict of IP addresses or failures in the network stack. Android. In this case, a complete reboot of both devices helps. Not just turning off the screen, but a complete system reboot allows you to clear the cache of network services and reset frozen search processes.
- 🔌 Unplug the TV from the outlet for 30 seconds to completely reset the power.
- 📶 Forget the Wi-Fi network on your smartphone and connect again (for hybrid modes).
- 🛡️ Disable your antivirus or firewall if they are blocking local connections.
- 🔄 Reset the network settings on your smartphone through the menu
Settings → Connection → Reset Wi-Fi.
Sometimes the problem lies in the settings of the TV itself. Some models Samsung or LG require explicit permission to connect new devices in the security menu. Check whether the input is blocked for unknown signal sources. Also make sure that the “Guests” mode is not activated on the TV, which isolates devices from each other.
⚠️ Attention: If the problem persists after resetting the network settings, check whether your router is using the “AP Isolation” function. This feature prevents devices on the same network from seeing each other, making Miracast impossible to work.
In rare cases, power saving becomes the culprit. The system Xiaomi can aggressively close background broadcast processes to save battery. Go to the battery settings, find the “Broadcast” or “Wireless Display” application and set the “No restrictions” mode so that the system does not interrupt the process.
The stability of the connection is 90% dependent on the quality of the Wi-Fi Direct signal and the absence of physical obstacles between the smartphone and the TV.
Use of third-party adapters and applications
If your TV does not support Miracast natively, the situation can be corrected using external adapters. There are devices on the market like Google Chromecast, Miracast dongles or set-top boxes Android TV Box. They connect to the HDMI port of the TV and create an access point for receiving a signal from a smartphone Xiaomi.
When using adapters, it is important to choose the correct operating mode. Some dongles have a mode switch: Miracast, AirPlay and DLNA. For Android smartphones, you must select Miracast mode. After switching, the adapter will begin broadcasting its SSID, which should appear in the “Broadcast” menu on your phone.
There are also software solutions that allow you to turn your laptop or PC into a signal receiver. Applications like LetsView or the built-in “Project to This PC” feature in Windows 10/11 allow you to receive an image from Xiaomi. To do this, the computer and phone must be on the same network, and the wireless display function must be activated on the PC.
However, it is worth remembering that software methods on the PC often introduce additional delay due to the need for the computer's processor to decode the stream. This is acceptable for viewing photos or presentations, but for dynamic content it is better to use specialized hardware dongles.
Why does the TV not see the Xiaomi smartphone?
Most often the problem is that the TV is in regular TV mode, and not in the mode of receiving a wireless signal. Switch the signal source (Source/Input) on the TV to HDMI (if using an adapter) or select the Screen Mirroring application. Also check if the Wi-Fi module on the TV itself is disabled in its settings.
Is it possible to transmit sound to external speakers via Miracast?
Yes, the Miracast protocol transmits both video and audio simultaneously. The sound will be played through the TV speakers or connected speaker system. If the sound comes only from the phone, check the volume settings and make sure that the “Video Only” checkbox is not checked in the broadcast menu (if such an option is in your software version).
Does broadcast affect the Internet speed?
No, since Miracast uses a direct Wi-Fi Direct connection between devices and does not use your home router to transmit the video stream. Your Internet channel remains free for other tasks. The exception is when you use adapters that work via a local network, but even there the load is minimal.
How to disable screen broadcasting?
To disable it, just lower the notification shade on your smartphone again, click on the active “Broadcast” button and select “Disable”. Or go to the broadcast settings menu and click the disconnect button. On the TV, the connection will be disconnected automatically, and it will return to the previous signal source.
Do all Xiaomi models support this function?
Almost all modern Xiaomi smartphones released over the past 5 years support Miracast at the hardware level. Exceptions may be the most budget models of the Redmi Go series or stripped-down versions for specific markets where the Wi-Fi Display module is software disabled. In such cases, only the use of external adapters will help.