In the age of widespread digitalization, the authorization process in wireless networks is becoming increasingly automated. Smartphone users Xiaomi, Redmi And Poco often face the need for quick access to Wi-Fi networks Without manually entering a complex password. QR code technology built into the shell MIUI and new HyperOS, allows you to instantly share credentials with other devices. This is especially important for smart home owners, who need to provide guests or new gadgets with access to the local network in seconds.
Many device owners mistakenly believe that the scanning function is only available through third-party apps. In fact, the system camera scanner or a special module in the wireless network settings is already integrated into the operating system. Understanding how it works encryption protocolThe information embedded in these codes will not only simplify connection but also secure your network from unauthorized access. In this article, we'll cover all aspects of generating and reading access codes in detail.
A key feature of the implementation in the Xiaomi ecosystem is the ability to generate a static code even for hidden networks (SSID Hidden), if the device has already been authorized in them. This distinguishes the Chinese manufacturer's approach from standard Android solutions, which often require an active connection to generate a QR code. We'll explore how to take advantage of this advantage and discuss the nuances of compatibility with iOS devices and other Android brands.
How QR code authentication works in MIUI and HyperOS
The quick connect function is based on the standard WPA/WPA2, the data for which is encoded in a matrix graphical format. When you create or scan a code, the smartphone reads the format string. WIFI:S:SSID_NAME;T:WPA;P:PASSWORD;;. Shell MIUI Automatically parses this string and initiates a connection request to the access point. This eliminates human error, such as typos or case-sensitive errors.
Data transfer security in this case is ensured by the fact that the password is not displayed in plaintext on the receiving device's screen until the actual connection is established. However, it's important to understand that anyone with access to the generated image can gain full access to your network. Therefore, QR codeThe code created for your main home network should be kept secret, unlike the code for your guest network.
In the latest firmware versions, the algorithm has become more flexible. While previously an active connection was required to display a QR code, the system now allows you to generate one based on saved profiles. This means you can print out an access code and display it in your office or coworking space, even if your phone isn't currently connected to that specific router, as long as the network profile is saved.
⚠️ Important: When generating a QR code for a WPA3-secured network, ensure that the receiving device also supports this encryption standard. Otherwise, the connection may fail despite the correct password.
Preparing the device and checking network settings
Before generating an access code, make sure your router and smartphone are configured correctly. Issues often arise due to split frequency bands or the use of complex characters in the network name (SSID), which may not be encoded correctly by some versions of QR code generators. Make sure you know the exact network name and encryption type.
For the feature to work properly, it's also important that the required permissions are enabled on your device. In modern versions of Android and HyperOS Geolocation access is often required for Wi-Fi operation, as scanning networks is equivalent to collecting location data. Without GPS enabled, the wireless module may limit functionality.
Please check the following parameters before starting the procedure:
- 📶 Make sure that the Wi-Fi module is turned on and in active search mode.
- 🔒 Verify security type: Encryption works for WPA, WPA2, and WPA3, but older WEP protocols may not be supported.
- 📱 Check for a saved network profile in the settings if you plan to generate a code for an already known access point.
- 🔋 Make sure your battery has sufficient charge, as the coding process and screen operation may consume power.
If you're using a corporate network with server-based authentication (802.1x), the standard QR code generation method may not work, as it requires a login and certificates, not just a password. In such cases, it's better to deploy profiles through MDM systems or manually configure them.
How to create a WiFi QR code for sharing on Xiaomi
The most common scenario is that you're already connected to the network and want to share access with a friend. In the ecosystem Xiaomi This is done through the standard settings menu. Open Settings, go to the section Wi-Fi and click on the name of the active network or the arrow next to it. The system will prompt you to generate a pattern.
The alternative path may vary depending on the shell version. In some builds MIUI You need to tap the QR code icon directly in the notification shade or in the network control widget. If you are using HyperOS, the interface has become more intuitive: just tap on the network icon in the list of available connections to see a large "Share" button or "QR code."
Once the image has been generated, you have several options:
- 📸 Take a screenshot and send the image via messenger.
- 🖨️ Print the code on a printer for permanent placement in the reception area.
- 📲 Show your phone screen to a friend to scan with their device's camera.
- 💾 Save to gallery as an image for later use.
⚠️ Caution: Do not place the QR code for your main home network in public areas. Anyone with a camera will be able to connect to your internet and access local resources, such as printers or NAS storage.
Step-by-step instructions: scanning and connecting
Connecting to the network via QR code on Xiaomi devices is extremely simplified and doesn't require installing any additional software. The built-in image recognition algorithm operates at the system level. To get started, unlock your smartphone and launch the default app. CameraPoint the lens at the code, trying to keep the phone parallel to the image plane.
Once the system recognizes the matrix, a pop-up notification will appear on the screen (usually at the top of the screen or as a bar). It will display the network name (SSID) and prompt you to connect. Tap the notification, and the phone will automatically enter the password and initiate the connection. You don't need to enter anything manually.
Follow these steps to ensure success:
- 📷 Launch the Camera or Scanner app from the notification bar.
- 🎯 Point the camera so that the QR code is in the focus frame.
- 👆 Wait until a yellow or blue bar with the network name appears.
- ✅ Click "Connect" and confirm the action if required.
In some cases, if the network is hidden or requires additional settings, the system may prompt you to go to the Wi-Fi settings menu, where the fields will already be filled in. All you need to do is click "Connect." This method is especially convenient for older people or children who have difficulty remembering long character combinations.
☑️ Check before connection
Setting up guest mode via QR code
To ensure the security of your main network, it is recommended to use the "Guest Network" feature on routers Xiaomi On many other models, this feature allows you to create an isolated access point. You can generate a separate QR code specifically for guests, preventing them from accessing your personal files and smart home devices.
To set this up, log into your router's web interface (usually at 192.168.31.1 or 192.168.1.1) or use the app Mi Wi-FiFind the "Guest Network" section, enable it, and set a password. After that, on your Xiaomi phone, when you connect to this guest network, you can generate the corresponding QR code using the instructions above.
Benefits of using guest code:
- 🛡️ Isolate guest devices from your local network.
- ⏱️ Possibility to limit access time.
- 🚫 Access to the router admin panel is blocked.
- 📉 Control the channel speed for guests so they don't slow down your traffic.
If you frequently host guests, it might be a good idea to print out a QR code for your guest network and frame it near your front door. This will eliminate constant "what's your password?" questions and secure your main network. In the app Mi Home You can also set up scenarios where connecting to the guest network will trigger other smart devices, such as turning on the welcome light.
What to do if the camera does not see the code?
If the standard camera doesn't recognize the image, try increasing the brightness of the screen where the code is displayed or cleaning the camera lens. You can also use the "Scanner" app from the "Tools" folder in MIUI, which has a more sensitive recognition algorithm.
Compatibility Chart and Troubleshooting
Despite the standardization of the technology, connection failures may occur. This may be due to Android versions, encryption types, or specific router features. Below is a table to help diagnose the problem.
| Problem | Possible cause | Solution |
|---|---|---|
| The camera does not respond to the code | Low brightness or glare | Increase the brightness of the source screen, wipe the lens |
| Error: "Failed to connect" | Incorrect password in the code | Recreate the QR code after checking the password in the router settings. |
| There is a connection, but no internet | Router limitations | Check MAC filtering settings or guest network limits |
| The code is read as text | No WIFI prefix | Make sure the generator uses a standard string format |
A common issue is frequency band incompatibility. If the router only broadcasts at 5 GHz, and the old smartphone only supports 2.4 GHz, the connection will fail, even if the password is correct. In the router settings Xiaomi You can combine bands (Smart Connect) or create separate SSIDs for each frequency to avoid confusion.
It's also worth mentioning the issue with character encoding. If your password contains special characters (such as spaces, quotation marks, or international characters), they may be interpreted incorrectly when generating a QR code. In such cases, it's recommended to change your router password to use only Latin letters and numbers.
FAQ: Frequently Asked Questions
Is it possible to connect an iPhone to Xiaomi Wi-Fi via QR code?
Yes, Apple devices (iOS 11 and above) can read standard Wi-Fi QR codes just fine. The process is identical: open the camera, point it at the code, and confirm the connection in the pop-up window. No additional apps are required.
What should I do if the QR code is not saved to the gallery?
In some MIUI versions, the save button may be missing from the preview. In this case, simply take a screenshot (usually by pressing the Volume Down + Power button or swiping with three fingers). The image will be saved in the "Screenshots" folder and can be shared or printed.
Is it safe to print a Wi-Fi QR code?
Printing out the code is only safe if it's a guest network with limited access. If you print out the code for your main network, anyone who can photograph it (even from a distance with a zoom lens) will have full access to your internet. Use strong passwords and change them regularly.
Does this method work for hidden networks (Hidden SSID)?
Xiaomi's default QR code generator may not generate a working code for a hidden network if the phone isn't connected to it. However, if the network profile is saved in the phone's memory, the system will generate a code that, when scanned by another device, will attempt to connect, even if the network is hidden. However, the receiving device must support connecting to hidden SSIDs via QR.