Modern smart home ecosystems have long since ceased to be just a collection of gadgets, becoming a single multimedia platform for entertainment. Owners of Xiaomi smartphones and TVs with support for Android TV or MIUI for TV often face the need to display images from a mobile device to a large screen. This can be watching movies from unverified sources, showing photos or even running heavy mobile games with improved graphics. Wireless video transmission technology allows you to get rid of unnecessary wires and enjoy content in high resolution without loss of quality.
However, the process of synchronizing devices does not always go smoothly, especially if you are using Mi Cast or Miracast functions for the first time. Users may experience audio delays, image artifacts or a complete lack of response of the TV to smartphone requests. Understanding the principles of data protocols and the correct sequence of actions will help avoid typical errors. In this article, we will discuss in detail all the stages of configuration, from basic requirements to advanced methods of optimizing connection.
You don’t need complex hardware or specialized networking knowledge to get started. It’s enough to have your devices support Wi-Fi Direct standards or be on the same local network. Xiaomi Mi TV Stick or PatchWall’s built-in system on the brand’s TVs have all the tools you need to implement this feature. We’ll look at universal methods that are suitable for both Xiaomi equipment and third-party Android TVs.
Technical requirements and equipment preparation
Before you start pairing devices, you need to make sure that your infrastructure is ready to transmit high-definition video stream.The main requirement is a stable wireless Wi-Fi connection. TV-set-top boxes are connected to the same access point, and using guest or client isolation networks can block each other from detecting devices.
It is also important to consider the version of the operating system and hardware capabilities of gadgets. On the side of the smartphone should be installed the shell MIUI version 10 or higher, where the screen broadcast functions are implemented most fully. The TV, in turn, should support Miracast protocols, AirPlay 2 or have a pre-installed Wireless Display application. If your TV is running on a pure Android TV, you may need to install additional software from the Google Play store.
⚠️ Note: Using Wi-Fi networks in cafes or hotels to broadcast the screen is often impossible due to router restrictions, which prohibit direct connection between users' devices.
Also check for firmware updates for both devices. Manufacturers regularly release patches that fix security vulnerabilities and improve connection stability. Older software may contain bugs that prevent devices from shaking hands correctly when trying to connect. Update is best done in advance, before the setup process begins, to avoid interruptions.
Set up the built-in Mi Cast feature on the TV
If you have a Xiaomi TV or a Mi Box, the wireless display feature is already built into the system and does not require additional applications. To activate the connection standby mode, go to the main menu of the device. Find an application called Wireless Display, Mi Cast or Wireless Display. Launching this application puts the TV in visibility mode, allowing other devices to detect it in the list of available for connection.
In some versions of PatchWall, this functionality can be hidden in the depth of settings. To activate it manually, go to Settings, then select Devices and Preferences, and find Outside Logins or Broadcast, where you can turn on the detection mode and, if necessary, change the device name so that it does not confuse it with other TVs on the network if there are more than one.
☑️ Checking the TV's readiness
Once the app is running, the TV will have a waiting interface with a logo and instructions, in which the device actively scans the airwaves for connection requests. If the connection is not established after a few minutes, the TV can automatically turn off visibility mode to save resources, in which case it will need to restart the application.
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To reduce latency, it is recommended to switch the TV to Game Mode in the image settings, if such an option is available in your model.
Broadcast screen from the smartphone Xiaomi
After the TV is ready, we move on to the smartphone settings. In the MIUI shell, the screen broadcast function is called Broadcast or Cast. You can find it in the notification curtain (quick access panel). If the icon is not in the visible area, click on the edit button (usually a pencil icon or three dots) and add the Broadcast widget to the active list.
An alternative way to use the system settings is to go to Settings, select Connect and Sharing (or Additional Features in older versions) and click Broadcast. The system will automatically start searching for available devices on the local network. Once your TV appears in the list, tap its name to begin pairing.
When you connect, you may see a confirmation request on your TV screen, which is a standard security measure to prevent unauthorized access to your screen, use the remote to confirm the connection, and after a successful handshake process, the image from your smartphone will be duplicated on the big screen in real time.
| Parameter | Description | Recommended value |
|---|---|---|
| Protocol | Data transmission technology | Miracast / Wi-Fi Direct |
| Permission | Quality of the output image | 1920x1080 (Full HD) |
| Frequency of personnel | Smoothness of motion of the picture | 60 Hz (for games) |
| Audio codec | Sound transmission format | AAC or SBC |
It's worth noting that when you're streaming live, your smartphone screen can stay on, which leads to increased battery consumption. Some models allow you to turn off your phone's display while you continue to stream video, but it depends on the specific application and the type of content. For viewing videos from a gallery or YouTube, this optimization is often built-in by default.
Using the Google Home app for Android TV
If the built-in MIUI tools don’t work or you’re using a smartphone from another manufacturer, the official Google Home app is a great solution.This is a universal tool for managing smart home devices, which also takes over the functions of broadcasting the screen through the Chromecast built-in protocol.
Once installed and logged in to your Google account, the app will scan the network and find the connected devices. Select your TV from the list of devices. On the main TV control screen, you will see the Cast my screen button. Pressing it will start the process of mirroring all the contents of the smartphone display.
What if Google Home doesn’t see TV?
The advantage of using the Google ecosystem is that it is highly stable and supports a wide range of formats. In addition, many apps such as YouTube, Netflix and Spotify have a built-in Cast button that runs directly through this protocol without requiring full screen mirroring, which allows you to use the phone as a remote without draining its battery with a video stream.
⚠️ Note: When using Google Home for games with high response time requirements (shooter, racing) you may notice a noticeable delay between pressing a button and acting on the screen.
Solving Connection and Delay Problems
Even if you set up correctly, users can face technical problems, most often the TV doesn’t show up on the list of available devices, first of all, check if the router is not enabled with AP (Access Point Isolation) isolation mode, which prevents devices on the same network from communicating with each other, making it impossible for Miracast and DLNA to work.
Another common problem is audio and image desynchronization or constant buffering. This often indicates congestion of the Wi-Fi channel. If your router supports two bands (2.4 GHz and 5 GHz), try to connect both devices to a 5 GHz network, which is less crowded by neighboring networks and provides the bandwidth necessary for high-resolution video streaming.
Also worth paying attention to is energy saving: Aggressive battery settings on a smartphone can force background broadcasting processes to close, add the Wireless Display app or Google Home to the power saving exception list, ensuring that the system doesn't interrupt data transmission to save energy.
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The stability of the connection is 90% dependent on the quality of the Wi-Fi signal and the absence of physical obstacles between the router and the devices.
Alternative methods and third-party applications
When standard methods fail, third-party solutions come to the rescue. AirScreen is one of the most popular apps for Android TVs. It emulates AirPlay, Miracast and Google Cast, allowing devices from various ecosystems, including iOS, to be connected directly from the app store on the TV.
For iPhone and iPad owners who want to connect to an Android TV, AirPlay 2 is a great choice. Many modern Xiaomi TVs already have AirPlay support built in. If your model is older, installing an emulator app on TV will solve the problem. Connection is via the standard screen repeat menu at the iOS control center.
Another option is to use remote desktop applications like TeamViewer or AnyDesk, although they are more support-oriented and can be more latent. Multimedia is better suited to specialized players like VLC for Android, which can send video files directly to the TV renderer, bypassing the entire screen mirroring process.