Modern technology allows you to turn your smartphone into a powerful multimedia content control panel, and Xiaomi’s bundle with a DEXP TV is no exception. Many users are faced with the desire to bring to the big screen photos from a family holiday or run a high-resolution film, but do not know where to start setting up the equipment. Fortunately, manufacturers have provided several universal ways to synchronize devices, each of which has its own features and advantages.
In this article, we will take a look at all the available methods of connection, from wireless protocols to physical cable connection. Wireless connection provides freedom of movement, while wired connection guarantees maximum signal stability without delay. The choice of the specific method depends on the model of your TV, the version of the MIUI operating system and the availability of additional equipment.
The right network settings and screens will allow you to enjoy content without interruptions and artifacts. It is important to understand that the broadcast process can vary depending on the applications used and the router settings. Below are proven algorithms of actions that will help you quickly establish interaction between gadgets.
Preparing devices for synchronization
Before any manipulations are initiated, it is important to make sure that both devices are in good condition and have up-to-date software. For DEXP TVs, especially Android TV models, it is critical to check for the latest system updates, as older versions of the firmware may contain bugs in wireless communication modules. Xiaomi smartphone should also be upgraded to the latest available version of MIUI to eliminate problems with data protocol compatibility.
The key to wireless connectivity is to have both devices on the same LAN, which means that both the phone and the TV must be connected to the same router, preferably at 5 GHz, to ensure high bandwidth. If you use a guest network or isolated VLANs, the devices may simply “not see” each other on the list of available gadgets.
⚠️ Note: When using guest Wi-Fi on a router, the device detection function (Discovery) is often blocked by security settings, making it impossible for the phone to find a TV.
It is also worth checking the battery charge of the smartphone, as active transmission of the video stream significantly increases the power consumption. It is recommended to connect the phone to the charger if you plan to watch long movies or presentations. For a DEXP TV, it is important to make sure that the correct signal source (Input) is chosen if you plan to use a wired connection.
☑️ Preparation for connection
Wireless connection via Wi-Fi Display (Miracast)
The most popular and convenient way is to use Miracast technology, which in the Xiaomi ecosystem is often called “Translation” or “Wireless Display”, which allows you to duplicate the screen of your smartphone on your TV in real time with minimal latency. To activate the function on the TV DEXP With Android, you don’t usually need to install additional apps because support is built into the system level.
On a Xiaomi smartphone, you need to lower the notification curtain and find the Translation icon. If the icon is not available in quick access, you can find it by searching in the settings or adding it through the Control Center shortcut editing menu. Once you turn on the function, the phone will start scanning available devices on the network, and in a few seconds your DEXP TV should appear in the list.
The pairing process may require confirmation on the TV screen, where a request for permission to connect from an unknown device appears. The Miracast protocol works directly between devices via Wi-Fi Direct, so the Internet is not necessary to transmit the image, local network is enough. Once the connection is successful, the image from the smartphone will appear on the full screen, and the sound will be broadcast through the TV speakers.
- 📱 Open your phone settings and find the Connection and Sharing section».
- 📡 Click on the "Translation" item and turn the switch on in the active position.
- 📺 Choose your TV. DEXP from the list of available devices.
- 🔒 Accept the connection request on the TV screen if it appears.
It's worth noting that the image quality is directly dependent on the power of the Wi-Fi signal and the loading of the channel. If you see jerks or desynchronization of the sound, try to bring the router closer to the viewing area or switch the frequency of the network. In some cases, rebooting the Wi-Fi module on both devices helps.
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To reduce latency when playing or watching videos, turn off QoS mode on the router or prioritize traffic for other devices to free up the channel for broadcasting.
Broadcasting through the Mi Remote app and built-in Android features
Owners of Android TV-based DEXP can use the built-in “Cast” feature in player apps such as YouTube or VK Video, a technique that differs from full screen duplication in that the phone acts only as a remote control, and the video stream is downloaded by the TV directly from the Internet, which significantly reduces the load on the smartphone battery and allows you to use the gadget for other tasks while watching.
To control the TV itself, switch channels or enter search queries, Mi Remote, which is pre-installed on all Xiaomi smartphones, is ideal. It uses an infrared port (if it is in the model) or a Wi-Fi network to emulate the remote control. You need to add a new device, select the TV category and the DEXP brand, after which the system will offer several code options for checking the work.
If standard methods don't work, you can use third-party aggregator applications like TV Cast or Web Video Caster, which can stream video from sites that don't have a live stream button directly to the TV screen, analyze the link to the video file, and send the TV command to play that stream without passing the smartphone browser.
⚠️ Note: When using third-party broadcast apps, make sure they have access to the local network, otherwise the device search feature may not work due to Android security limitations.
The Google Assistant also allows voice control, and just say, "Ok Google, turn on the TV," and the system will try to run content on the big screen if the accounts are synced, which is especially handy when the hands are busy or the remote is lost.
What to do if your phone can’t see TV?
Using DLNA Technology for Multimedia
The Digital Living Network Alliance (DLNA) technology is designed to share multimedia content between devices within the home network, and unlike Miracast, it does not duplicate screens, but instead allows you to transfer photos, videos and music from your phone to your TV for regular TV playback, ideal for viewing archives of photos or movies downloaded in high quality.
On smartphones Xiaomi function DLNA-The server is often embedded in a standard file explorer or gallery, and just open a video file, press the "More" or three dots button, select "Translate" or the TV icon, and the file will play on the screen. DEXP. The TV in this case acts as a renderer, and the phone – the controller and the data source.
For more advanced media library management, you can install a dedicated server application on your phone, such as BubbleUPnP, or use a built-in media server, which allows you to create a library of content that is accessible not only from your phone, but also from other devices on the network. DEXP TV automatically detects shared folders in the Media or Sources section.
| Parameter | Miracast (Translation) | DLNA (Media) | Chromecast (Google Cast) |
|---|---|---|---|
| Type of transmission | Full screen duplication | File transfer | Streaming |
| Dependence on the phone | High (screen on fire) | Low (you can turn off the screen) | Medium (used as a remote) |
| Image quality | Depends on the Wi-Fi signal. | Original (without compression) | Adaptive (up to 4K HDR) |
| Sound. | Through TV. | Through TV. | Through TV. |
The advantage of DLNA is that it can play back files in their original quality without real-time transcoding, which often happens when broadcasting a screen. However, the file format must be supported by the DEXP TV codecs, otherwise playback will be impossible without conversion.
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DLNA is the best choice for viewing heavy video files (4K, Blu-ray rips), as the decoding load falls on the TV’s processor, not the smartphone.
Connecting via HDMI adapter
If the wireless connection is unstable or requires maximum image transmission without compression, it is worth considering a wired option. To connect a Xiaomi smartphone to a DEXP TV via cable, a special adapter is needed, since direct HDMI port in phones is extremely rare. Most modern models support image output via a USB Type-C port using MHL or DisplayPort Alt Mode technology.
You will need to purchase an adapter. USB Type-C to HDMI. It is important to make sure that your specific Xiaomi model range supports video output through the USB, In low-end models (Redmi Note series, some Mi models), this port can be limited only to charging and data transfer. USB 2.0. Flagship models are usually equipped with a port USB 3.0/3.1/3.2 video-enabled.
The connection process is as simple as possible: insert the adapter into the smartphone connector, connect the HDMI cable from the adapter to the free port of the DEXP TV. On the TV remote, click the signal source selection button (Input or the arrow square icon) and select the appropriate port, for example, HDMI 1. The image should appear automatically, often with the Do Not Disturb mode on the phone so that notifications do not overlap the content.
- 🔌 Get a quality adapter USB-C on HDMI permit-support 4K.
- 📺 Connect the cable. HDMI television-to-TV DEXP adapter.
- 📱 Connect the adapter to the charging port of the Xiaomi smartphone.
- 🎮 Switch the signal source on the TV to the appropriate input HDMI.
A feature of wired connectivity is that it can charge your smartphone while you're working. Many adapters have an additional USB Type-C port to connect the original charging, which compensates for the high power consumption of the output, allowing you to watch movies for hours without fear of battery drain.
⚠️ Caution: Cheap adapters without additional power may not start a video output on the TV or cause constant signal breaks due to a lack of power in the port of the phone.
Problem Solving and Quality Customization
During the setup process, users may encounter a number of typical problems, such as no sound, desynchronization of audio and video, or low resolution of the image. If the sound is coming from the phone rather than from the TV, check the audio output settings in the Translation menu or in the Bluetooth settings if the sound is redirected there. Sometimes it helps to simply switch the sound source in the settings of the running application.
Delays (lag) when managing the interface or in games are often due to overloading the Wi-Fi channel by neighboring networks. In this case, it is recommended to manually change the wireless channel in the router settings to a less loaded one (for example, 1, 6 or 11 for 2.4 GHz). For a frequency of 5 GHz, channel selection is less critical, but can also affect stability.
If the DEXP image on your TV is not full screen or has black bars, check the aspect ratio settings. On your TV, this is usually the Aspect button or the menu settings where you need to select Screen Size or 16:9. The phone in broadcast mode may also have resolution settings that you should set to 1920×1080 or 3840×2160 depending on the TV matrix.