Modern multimedia systems are rarely limited to a single screen in the home, and there is often a need to stream images to multiple devices simultaneously. Users are looking for ways to How to connect two TVs via Wi-Fito create a unified information panel or simply duplicate an image from one room to another. This is especially useful for bars, stores, presentation rooms, or simply large apartments where you want to see content in different areas.
Technically, the process does not involve a direct connection "TV-TV" over the air, but a connection through a common local network (LAN) or router. Unlike cabled solutions, wireless connection eliminates the need to run long HDMI cables throughout the apartment, although it does require signal stability. Wireless data transmission Today, it is possible to stream high-definition video without noticeable delays if the equipment is selected correctly.
In this article, we'll cover all working synchronization methods, from built-in Smart TV protocols to using third-party apps. You'll learn which data transfer standards your devices support and how to configure them for stable operation. It's important to understand that the results largely depend on router performance and the software versions of the TVs themselves.
Technical requirements and equipment compatibility
Before you begin setting up, you need to make sure your equipment supports the necessary functions. Not all TVs, even those with the Smart TV logo, can operate as a signal receiver or have built-in protocols for screen synchronizationThe basic requirement is that both devices have a Wi-Fi module and support the same media content transmission standards.
Modern models from Samsung, LG, Sony, and other major brands typically come equipped with a range of protocols such as DLNA, Miracast, or AirPlay 2. However, if you have one model from 2023 and another from five years ago, version conflicts may arise. codecs or a lack of support for new encryption standards. In such cases, older devices may simply not recognize newer ones in the network environment.
The bandwidth of your wireless network is also critical. Streaming Full HD or 4K content to two screens simultaneously requires a stable connection. If your router operates in the 2.4 GHz band and is located far from your TVs, you may experience image artifacts or connection drops. The ideal option is to use a dual-band router with 5 GHz support.
⚠️ Note: If one of your TVs doesn't have built-in Wi-Fi (e.g., an older model), a direct wireless connection is not possible. You'll need to purchase an external adapter or a TV box, which will handle signal reception and decoding.
To check compatibility, go to the network settings menu on both devices. A list of supported technologies is usually displayed there. Look for mentions Wi-Fi Direct, Screen Share or Home NetworkThe absence of these menu items does not always mean a complete inability to connect, but will require the use of additional gadgets.
Method 1: Using DLNA technology
The most universal way to organize communication between TVs is the protocol DLNA (Digital Living Network Alliance). It allows devices connected to the same network to exchange multimedia content. In this setup, one TV (or other device, such as a smartphone) acts as a server, and the other acts as a renderer, displaying the image.
To set up streaming, both TVs must be connected to the same router. Go to the network settings of the first TV and ensure the "Media Server" or "DLNA" function is enabled. On the second device, open the "Media Player" or "Gallery" app, where the first TV should appear in the list of available devices. After selecting the source, the image or video file will begin streaming.
DLNA's main advantage is its operating system independence. You can connect Android TV to Tizen or WebOS without any problems. However, it's worth remembering that this protocol is primarily designed for file playback, not full screen mirroring (interface cloning) in real time.
For a more complex setup, such as creating a unified media library, you can use a computer as an intermediate link. Install server software on the PC (for example, DLNA Server), add video files there, and then both TVs will be able to simultaneously access content from the computer. This solves the problem of needing to show the same video on two screens, but the source file is located on an external drive.
Method 2: Screencasting (Miracast and Wi-Fi Direct)
If your goal is not just to open a file, but to completely duplicate the image from one screen to another (cloning function), then you will need technologies Miracast or Wi-Fi DirectUnlike DLNA, these protocols transmit a video stream from the screen in real time, allowing you to stream your browser, menus, or games without being tied to specific files.
Setup is done through the "Cast" or "Screen Share" menu. On the source TV, select "Screen Mirroring" and find the second TV in the list of available devices. Using Wi-Fi Direct, devices can connect directly, bypassing the router, creating a separate access point. This is convenient if the router is overloaded, but may limit internet access on one device during casting.
It's important to consider latency. When transmitting images via Miracast, there may be a 1-3 second delay. While this isn't a big deal for watching movies, if you plan to use this setup for gaming or interactive presentations, the delay may be noticeable. Refresh rate The frame rate can also be reduced to ensure a smooth flow.
| Protocol | Transmission type | Router dependency | Delay |
|---|---|---|---|
| DLNA | File | Required | No |
| Miracast | Streaming (Screen) | Not always (Wi-Fi Direct) | Yes (1-3 sec) |
| AirPlay 2 | Streaming | Required | Minimum |
| Chromecast | Streaming | Required | Minimum |
Some manufacturers implement their own add-ons to the Miracast standard. For example, Samsung has this Smart View, and LG has - Screen ShareDespite the different names, the operating principle remains the same: searching for a device on the air and establishing a secure connection to transmit a video stream.
☑️ Check before connection
Using ecosystems: Apple AirPlay and Google Chromecast
Owners of Apple and Android devices can take advantage of native ecosystem solutions, which are often more stable than universal protocols. If both TVs support AirPlay 2 (This is typical for new models of Samsung, LG, Sony, Vizio), you can easily duplicate the screen from your iPhone or iPad to several devices at once using the "Home" function in.
For Android devices and TVs with built-in Chromecast The situation is similar. You can create a "Device Group" through the Google Home app. This allows you to group multiple TVs (and smart speakers) into a single zone and stream content to them simultaneously. This is ideal for creating a unique atmosphere in different rooms of the house.
However, there's a catch: for AirPlay 2 to work, both TVs must be from authorized manufacturers that support this standard. In the Android world, the situation is simpler—Chromecast is built into many models, but grouping often requires a physical Chromecast or Android TV Box on each TV if the built-in system doesn't support grouping.
⚠️ Note: Smart TV interfaces are regularly updated by manufacturers. The location of the "Cast" or "Device Connection" menu items may vary depending on the firmware version. If you don't see the feature described, check for software updates in the "Support" section.
The advantage of ecosystem solutions is minimal latency and high picture quality. Apple, for example, adapts the bitrate in real time depending on signal quality, preventing image blocking. This makes AirPlay the preferred choice for iPhone users, even if their TVs are from different brands.
What to do if the devices cannot see each other?
A common cause is client isolation (AP Isolation) on the router. This feature prevents devices within the network from communicating with each other. Go to the router settings (usually 192.168.0.1) and disable "AP Isolation" or "Client Isolation" in the wireless network section.
Third-party sync apps
When built-in features aren't sufficient or don't work correctly, third-party apps come to the rescue. Smart TV app stores (Samsung Apps, LG Content Store, Google Play) offer a variety of image transfer utilities. Popular solutions include TV Cast, TeamViewer (for control) or specialized DLNA players.
One effective method is to install the same media player app (such as VLC or Plex) on both TVs. By creating a shared media library on your computer or NAS, you can start playing the same file on both screens almost simultaneously. You can use voice commands or smartphone remote controls to synchronize playback.
There are also apps that turn your smartphone into a remote control for multi-room systems. You select a video on your phone and send the "Play" command to a group of TVs at once. This requires all devices to be registered to the same service account (for example, a Samsung or LG account).
When using free versions of such apps, be prepared for ads or session time limits. Paid versions (Premium) usually offer a more stable connection and support for 4K HDR codecs, which is critical for high-quality images on large screens.
Connection problems and how to fix them
Even with proper setup, users may encounter difficulties. The most common issue is that TVs don't see each other. Make sure both devices are connected to the same network (SSID), not a guest network or a neighboring frequency band if the router divides them into different subnets. Check whether the router is configured to block data exchange between clients.
The second common problem is low transfer speeds, which leads to constant buffering pauses. This can be resolved by switching to the 5 GHz frequency if your router and TVs support it. Also, try moving microwaves and cordless phones away from the router, as they create interference. electromagnetic interference.
If the connection is constantly dropping, try statically assigning IP addresses to your TVs in your router settings. Dynamic address allocation (DHCP) can sometimes fail, changing the device's address and causing connection loss. Assigning a permanent IP address will stabilize performance. local network.
⚠️ Please note: Updating your TV's firmware may reset all network settings. If the connection is lost after the update, re-enter your Wi-Fi password and check your app permissions.
FAQ: Frequently Asked Questions
Is it possible to connect two TVs of different brands (for example, Samsung and LG)?
Yes, this is possible via universal protocols like DLNA or Miracast, as well as third-party apps. However, features like AirPlay 2 can only work if both brands are certified by Apple. For maximum compatibility, it's best to use a media server on a PC or Android set-top box.
Will there be a sound delay when broadcasting to two TVs?
When using Wi-Fi, audio latency is virtually inevitable and can range from 0.5 to 3 seconds relative to the source. If TVs are positioned close together, there may be no desynchronization between them, but there will be lag when it comes to user interactions (for example, in a game).
Do you need internet to connect two TVs?
No, a global internet connection is not required. For local network operation (DLNA, Miracast Direct), both devices only need to be connected to the same router, even if the router doesn't have access to the external network. A working local network is the main requirement.
Why is the picture on the second TV of poor quality?
Most likely, your router is automatically reducing the stream's bitrate due to a weak signal or interference. Try moving closer to the router, switching to 5 GHz, or reducing the streaming video resolution in the app settings.