Cast on Xiaomi: A Complete Guide to Wireless Broadcasting Technology

Have you ever wanted to show vacation photos on a Xiaomi big screen without wires? or run a YouTube movie from a Redmi smartphone directly to the Mi. TV? And all of this is possible because of Cast technology, which is wirelessly streaming content between devices, but what is it really about, how does it work in the Xiaomi ecosystem, and why do you sometimes have problems connecting content?

In this article, we will take a closer look at what Cast is on Xiaomi devices, from smartphones to smart TVs. You will learn what protocols are used (Miracast, Google Cast, DLNA), How to set up a stream from different devices, and what to do if the screen is not duplicated or the sound is late, and we also compare Cast to alternative ways of transmitting content, from the very beginning of the game. HDMI-cable.

If you are just starting out with wireless technology or have experienced a “failed to connect to the device” error, this article will help you to put everything on the shelves. Without water, only proven instructions and solutions!

What is Cast and How it Works with Xiaomi

Cast (transmit) is a technology that wirelessly streams multimedia content (video, audio, images) from one device to another. In the context of Xiaomi, it is about transferring the screen of a smartphone, tablet or computer to a TV, projector or Mi speaker without using wires.

Xiaomi’s ecosystem uses several Cast protocols:

• 📱 Miracast – standard for screen duplication over Wi-Fi Direct (works on most Mis) TV smartphone Xiaomi/Redmi/Poco).
• 🎬 Google Cast – a protocol from Google used in Chromecast and some Mi models TV (For example, Google. TV).
• 📡 DLNA — universal standard for transferring media files (photos, videos, music) over a local network.
• 🔄 Mi Share – Xiaomi’s proprietary development for fast file transfer between brand devices.

The main difference between Cast and other data transfer methods (e.g. Bluetooth or Wi-Fi Direct) is the ability to broadcast the screen in real time with minimal latency. For example, you can play a mobile game on a smartphone, and the picture will be displayed on the Mi TV. TV 4S without noticeable lags (with a good Wi-Fi signal).

How does it work technically? The source device (smartphone) encodes the image and sound, sends them wirelessly to the receiver device (TV), which decodes the signal and displays it on the screen. The whole process takes a fraction of a second, but the quality depends on:

• 📶 Wi-Fi signal strength (optimum 5 GHz).
• 🖥️ Screen resolutions (on 4K More resources may be needed).
• 🔋 Productivity (old models of Redmi) 4X may "brake").

What Xiaomi devices support Cast

Cast technology is available on almost all modern Xiaomi devices, but there are nuances depending on the model and firmware. Below is the compatibility table of the main devices:

Important: Even if your device is on the list, Cast may not work because of:

• 🔄 Outdated firmware (update) MIUI or PatchWall).
• 🔌 Disconnected Wi-Fi or aircraft mode.
• 🛠️ Failures in network settings (try restarting the router).

How to Enable and Configure Cast on Xiaomi

Setting up Cast on Xiaomi devices takes less than a minute, if you know the right algorithm. Consider two of the most popular scenarios: streaming a smartphone screen to a TV and streaming a video from YouTube.

Method 1: Duplicating the screen of a smartphone (Miracast)

This method is suitable for mirroring the entire screen of the smartphone on the Mi TV Or a projector:

1. Make sure your smartphone and TV are connected to the same Wi-Fi network (or turn on Wi-Fi Direct on your TV).
2. On your smartphone, open Settings → Connections and sharing → Wireless display.
3. Turn on the Wireless Display slider and wait for the device to be found.
4. Choose your Mi. TV You'll see a connection request on the TV, confirm it.
5. Now the smartphone screen is duplicated on the TV.

Make sure that the TV is on Wi-Fi

Check the battery charge of the smartphone (minimum 30%)

Shut down. VPN (can block the connection)

Close background applications (saves resources)-->

Method 2: Streaming video from apps (Google Cast)

Many apps (e.g. YouTube, Netflix, Kinopoisk) support Google Cast, which is a direct stream of content to the TV without duplicating the screen.

1. Open an app (like YouTube) and start a video.
2. Click on the Cast icon (usually in the upper right corner).
3. Select your Mi TV from the list of devices.
4. The video will start playing on the TV, and only the control panel will remain on the smartphone.

The advantage of this method is saving battery power, since the smartphone does not broadcast the entire screen, but only sends a link to the video.

💡

If the Cast icon doesn’t appear in the app, check if the devices are connected to the same Wi-Fi network and if the TV software is updated to the latest version.

Method 3: Transfer of files by DLNA

If you need to stream local files (photos, videos, music) from your phone to your TV, use the DLNA:

1. On the TV, open the Media Player or Photos app.
2. Select the DLNA source or Local Network.
3. On your smartphone, open the Gallery or Music, select a file and click Share → DLNA.
4. Choose your TV from the list.

This method is convenient for watching home videos or listening to music without an Internet connection.

Common Cast Problems on Xiaomi and Their Solutions

Even with the right setup, Cast can malfunction, and here are the most common problems and ways to fix them:

1.The device can't find the TV

If the smartphone does not see the Mi TV In the list of available devices for Cast, check:

• 🔌 Both devices are connected to the same Wi-Fi network (not to different bands 2.4 GHz and 5 GHz).
• 🔄 Miracast mode is enabled on the TV (Settings) → Network → Miracast).
• 📱 Wi-Fi and Bluetooth enabled (sometimes required for detection).
• 🔄 Restart the router and both devices.

💡

If the TV is connected to the router via cable (Ethernet), and the smartphone is connected via Wi-Fi, the Cast may not work. Connect both devices to the same wireless network.

2. Sound or video delay (lag)

If the image and sound are not synchronized or are in a jerky state:

• 📶 Switch to 5 GHz in router settings (less interference).
• 🖥️ Reduce the broadcast resolution in Cast settings (e.g., with 1080p on 720p).
• 🔌 Disconnect other devices from the network (they can load the channel).
• 🔋 Close background apps on your smartphone (especially games or torrents).

3. No sound during broadcast

If the video is on and there's no sound:

• 🔊 Check if the sound on your TV or smartphone is turned off.
• 🔄 Reconnect devices (sometimes re-pairing helps).
• 🎵 In the Cast settings on your smartphone, select Transmit sound (if there is such a point).
• 🔧 Update the TV firmware (older versions of PatchWall have sound bugs).

4. The broadcast is interrupted or disabled

If the connection breaks after a few minutes:

• 📶 Check the distance between the devices (maximum 10 meters without obstacles).
• 🔋 Make sure your smartphone has enough charge (below 15% Wi-Fi can be turned off).
• 🔄 In router settings, turn off Wi-Fi Power Savings (may break connection).
• 🛠️ Reset the network settings on the TV (Settings) → Network → Reset).

Cast vs. Alternative ways to transfer content

Cast isn’t the only way to stream content to Xiaomi devices, but let’s look at the alternatives and their pros and cons:

If you need to duplicate the screen (for example, for games or video calls), Cast is optimal or HDMI. Google Cast is more convenient for watching movies from the Internet directly from the apps, and if you want to transfer local files — DLNA or Mi Share.

💡

For iPhone and Mi owners TV AirPlay is more stable than Miracast and supports Dolby Atmos.

Security and privacy when using Cast

Cast is convenient, but not always secure. Here's what to look for:

1. Local area network ≠ If your Wi-Fi is not password protected, anyone in range of the router can try to connect to your TV or intercept the broadcast. WPA3 and complex password.

2.Data leakage risk: When you duplicate a screen through Miracast, all notifications (including messages from messengers) will be visible on the TV. If you are broadcasting a screen in a public place, turn off notifications or use Google Cast (it only transmits content, not the entire screen).

3. Phishing through fake devices.Attackers can create a fake Cast device with a name similar to your TV (e.g., a fake Cast device, "MiTV_Home" instead "MiTV_Home_55"). Always check the exact name of the device before connecting.

4. Data collection by applications. Some applications (e.g. TikTok or Facebook) may collect data about your broadcasts. In application settings, turn off LAN permissions if they are not needed.

💡

Before broadcasting confidential content (such as documents or correspondence), use the Safe Mode function in the Internet. MIUI: It hides notifications when connected to external screens.

⚠️ Note: If you connect to Cast at a hotel or other public place, there is a risk that your traffic may be intercepted. VPN (for example, Xiaomi VPN) Avoid transmitting sensitive data.

The future of Cast in the Xiaomi ecosystem

Cast technology continues to evolve, and Xiaomi is actively integrating new capabilities into its devices.

1. Support 8K and 120 New TV models (e.g. Xiaomi) TV 7) They already support the broadcast in the permission 4K@120Hz, and in 2026–2026 yearly 8K Cast (only for now) HDMI 2.1).

2. Improved sound synchronization. in recent updates MIUI 14 and PatchWall 4 added Wi-Fi support 6E, Reduces sound delays to 50 ms (previously 100–200 ms).

3. HyperOS Integration: New Operating System from Xiaomi (Replacement) MIUI) promises smoother Cast work between devices, including smartwatches and speakers.

4.Support for Matter for smart homes: In the future, Cast could become part of the Matter ecosystem, allowing the screen to be broadcast not only to TVs, but also to smart home panels (e.g. Xiaomi Smart Display).

5. AI streaming optimization. Xiaomi 14 already has a feature AI Super Resolution, which improves the quality of live video, could be extended to Cast in the future.

If you are planning to buy a new Xiaomi device and you are important to the Cast feature, pay attention to models with Wi-Fi 6 and Google support. TV — They will ensure maximum stability and quality of the broadcast.

FAQ: Frequent questions about Cast on Xiaomi