Modern users of Xiaomi and Redmi smartphones often face the need to display images on the big screen, especially when the built-in Smart TV features are unstable or require complex Wi-Fi configuration. Using a wired connection via a USB interface is one of the most reliable ways to ensure stable video streaming without delay and loss of quality. Unlike wireless technology, cable guarantees minimal ping, which is critical for gaming or watching high-resolution video.
But the standard USB port on a TV is often designed to play media from flash drives, not to receive video. To turn your smartphone into a signal source for a TV, you need to understand the differences between port modes and choose the right adapters. Many tech owners mistakenly believe that any USB-C cable will allow you to display a picture, but this is not always the case due to hardware limitations of budget models.
In this article, we will discuss in detail all the nuances of wired connection of Xiaomi brand mobile devices to TVs through the Internet. USB-You'll learn which cables and adapters actually work, how to set up debugging mode, and what alternative methods exist if direct output is not possible. We'll also discuss compatibility issues between different versions of the operating system. MIUI HyperOS with external displays.
Technical limitations of USB ports on Xiaomi smartphones
Before you buy adapters, you need to clearly understand what interface is installed in your gadget. Most budget and mid-budget models Xiaomi and Redmi are equipped with a USB 2.0 port that physically has a Type-C connector, but does not functionally support video transmission. This means that a simple connection with a Type-C cable - HDMI in such cases will not work, since the necessary hardware support for the DisplayPort Alt Mode protocol is missing.
Flagship devices like the Xiaomi Mi series or Xiaomi 13/14 are most often devoid of this limitation and can stream video directly. MHL (Mobile High-Definition Link) technology or its more modern counterparts allow video and audio to be transmitted over a single cable, but require support from the chipset. If your smartphone does not support these standards, the operating system simply does not recognize the connection of an external display.
⚠️ Note: Trying to use cheap Type-C passive adapters HDMI with phones that do not support video output, can cause the power controller to overheat and quickly discharge the battery without any image on the screen.
To check the support of the video output, you can use specialized applications from the Google Play store, which test the capabilities of the video output. USB-The information is often contained in the technical documentation on the manufacturer's official website or in the specifications on the profile resources, and ignoring this stage will lead to a waste of time and money on unnecessary accessories.
How to know exactly the support of the video output?
Equipment and cables required for connection
To establish a stable connection, you will need not just a cable, but a whole set of accessories that are compatible with the Android ecosystem. The main element is an adapter that converts a smartphone’s digital signal into a format that is understandable to the TV. The market is full of various options, but for Xiaomi equipment, original or certified accessories that ensure the correct switching of contacts are best.
If your smartphone supports video output, you will need an active Type-C to HDMI adapter. It is important that this adapter has an additional port for power connection, since video transmission consumes a significant battery life. In the absence of hardware support for video output, the only option is to use adapters that use DisplayLink technology, which require the installation of a special driver and use the phone's processor to encode the image.
The cable must be of high quality, shielded to avoid interference and signal loss. The length of the cable also matters: for passive connections, it must not exceed 1.5-2 meters, otherwise image artifacts may begin. For longer distances, active cables with an integrated signal amplifier are required.
- 🔌 Type-C adapter on HDMI supportive 4K port USB feeding.
- 🔋 External power supply (Power Bank or socket) for recharging the smartphone during the broadcast.
- 💻 Cable HDMI-HDMI High Speed for connecting adapter and TV.
- 📱 Stylus or mouse (optional) for easy interface control on a large screen.
Step-by-step: Connect via HDMI adapter
Connecting a smartphone to a TV through USB-The adapter requires a consistent pattern of action to avoid device recognition errors, so you first need to connect all the cables to the adapter, and then insert it into the smartphone connector. MIUI correctly identify the new device and start the necessary mode of operation.
Once you have a physical connection on your TV, you should select the right signal source. Use the remote control to switch inputs to the HDMI port that the adapter is connected to. If done correctly, a notification may appear on the smartphone screen that the external display is connected, and the image will be duplicated or go into desktop expansion mode.
☑️ Connection algorithm
In some cases, you need to manually activate the image output mode. In the phone settings, go to Settings → Connections and Sharing → Broadcast or similar item, depending on the firmware version. If you use an adapter with DisplayLink technology, you must pre-installe the corresponding application and provide it with all the permissions requested.
| Type of connection | Equipment required | Sound support | Delay (Latency) |
|---|---|---|---|
| Straight (Native) | Type-C to HDMI adapter | Yes, through HDMI. | Minimum |
| DisplayLink | Adapter with DL + Application | Yes, through the app. | Medium |
| USB-OTG (Flash drive) | OTG + Flash Cable | No (files only) | N/D |
| Wi-Fi Cast | Router + TV with Smart | Yes. | Tall. |
Configure the interface and display modes in MIUI
The MIUI shell and the new HyperOS offer flexible settings for external displays. Once successfully connected, the system can offer several modes of operation: mirroring (full copy of the screen) or desktop expansion. Mirror mode is useful for displaying photos and videos, while the extended mode turns the smartphone into a computer with separate windows.
For a comfortable viewing of movies, it is important to adjust the resolution and refresh rate. In the Settings → Screen menu, you can find external output options. If the TV supports HDR, make sure this feature is activated to make the colors look saturated and natural.
Sound management also requires attention. By default, sound can go through the phone's speaker even if the video is displayed on TV. To fix this, open the control panel (curtain) and in the media or Bluetooth/connections section, select audio output to an external device or HDMI. In some Xiaomi models, this happens automatically, but not always.
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Use Do Not Disturb mode on your smartphone while watching movies so that incoming notifications and calls don’t overshadow the image on the big TV screen.
Alternative methods: USB-cable
There is a problem that you can simply connect two devices with a cable. USB-USB And you can't actually send a video, because both devices are hosts or clients, and they don't understand each other without a software bridge. USB-debugging and specialized software, you can organize the transmission of video stream by protocol ADB (Android Debug Bridge).
To implement this method, you will need a computer as an intermediate or install a server application on the TV itself (if it is on Android). TV). A popular solution is to use a bundle of scrcpy (for advanced users) or client applications on TV that receive streaming. USB-This is a complicated setup, but it allows you to achieve minimal latency.
To enable debugging, go to Settings → About Phone and click on the build number seven times to activate the developer menu. Then, in the advanced settings, find Debugging over USB and activate it. When connecting to another device, you will need a confirmation on the smartphone screen.
⚠️ Attention: Including debugging by USB It opens up a wide range of access to the system. Never connect your smartphone to other people's computers or public charging stations with activated debugging mode, it's a security threat.
Solving common connection problems and errors
Even with the right connection, users can face a number of problems, the most common being the lack of image when the black screen is present, which may indicate incompatibility of resolution or frame rate. Try changing the output resolution in the phone settings to a more standard one, such as 1920×1080 at 60Hz.
Another problem is the discontinuous image or lack of sound, often solved by replacing the HDMI cable with a better one or reconnecting the power adapter. If the sound is coming through the phone, check the settings in the application through which the broadcast is being broadcasted, since some video players have their own audio output settings.
If the TV can't see the smartphone at all, it's possible that the adapter requires more power than the phone port can give, and in this case, using external power to the adapter is a must, and it's also worth checking whether the antivirus or MIUI system constraints block the operation of external devices.
- 🔄 Restart both devices if there are recognition errors.
- 🔌 Check the density of the adjoining contacts in the connectors.
- ⚙️ Update your TV drivers and smartphone system to the latest version.
- 🎬 Use video players with external output support, for example, VLC or MX Player.
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Image quality and connection stability are 90% dependent on the quality of the adapter used and the availability of external power, not just the power of the smartphone.