Modern Redmi and Xiaomi smartphones running MIUI or HyperOS offer a variety of convenient features to simplify network interaction. One of the most popular is sharing Wi-Fi connection data without having to manually enter a complex password. This method is especially useful when you need to connect guests or a new smart device to your home network, and typing a long string of characters is inconvenient.
Usage QR code Significantly speeds up the authorization process and minimizes the risk of entering the security key incorrectly. Redmi device owners can not only scan connection codes but also generate them for internet sharing, turning their phone into a hotspot for other devices. In this article, we'll explore both use cases in detail and discuss any technical nuances you might encounter.
It's worth noting that the interfaces of different firmware versions may differ slightly, but the basic operating principle remains the same for all current models, whether it's a budget Redmi Note or a flagship Xiaomi. Understanding how Android network modules work will allow you to confidently manage connections in any situation. Let's move on to the practical part and review the step-by-step algorithms.
⚠️ Attention: The Settings menu interface may vary depending on the MIUI/HyperOS version and regional firmware. If you can't find the item you're looking for, try using the search bar at the top of the Settings menu and searching for "QR" or "Wi-Fi."
Generating a QR code for Wi-Fi sharing on Redmi
The first step users often need is to create a visual access key for guests. When friends come over or you're setting up your smart speaker, there's no need to dictate a password. Your Redmi smartphone can generate a special one. barcode, containing encrypted data about the network's SSID and security key. To do this, you must already be connected to the Wi-Fi network whose data you plan to broadcast.
Go to the main settings menu of your device and select the section Wi-FiA list of available networks will be displayed here, and the network you're currently connected to will be shown at the top of the screen. Click on the name of the active network or the arrow to the right of it to expand the connection details. This is where the feature you're looking for is located.
In the window that opens, you'll see the network name, frequency range, and the QR code itself. The Android system automatically generates it based on your current connection settings. MIUI It also allows you to copy the password in text form or send it via instant messengers, but for a quick connection, simply showing the phone screen is enough.
It's important to understand that the generated code is static until you change the router password. If you change the router's security settings, the old QR code will no longer work, and you'll have to generate a new one. This is standard behavior for the WPA2/WPA3 security protocol, ensuring the protection of your data.
Connect to the network by scanning the code
Now let's consider the opposite situation: you need to connect your Redmi to the network using another device's camera or an existing code. In older versions of Android, this required third-party apps, but modern shells like HyperOS and the latest versions of MIUI have a built-in scanner right in the Wi-Fi menu. This makes the process as native and fast as possible.
Open the wireless network settings and look for the "Add network" button or the dedicated scanner icon, usually located in the upper-right corner or at the bottom of the network list. Tapping this icon activates your smartphone's camera with an overlay scanning interface. Point the camera at the QR code, and the system will automatically recognize the data.
After a successful scan, a pop-up window will appear on the screen prompting you to connect to the detected network. You don't need to manually enter any characters; the system will automatically fill in the characters. SSID and a password. Simply press the "Connect" button, and the phone will begin the authorization process. This is especially convenient if the password contains complex characters that are easily confused when entered manually.
☑️ Pre-scan check
If the scan is successful, the device will automatically save the network profile. In the future, whenever you come within range of this router, your Redmi will connect automatically. This eliminates the need to repeat the process every time you return to a friend's house or the office.
Using the Hotspot feature via QR
The mobile internet sharing feature deserves special attention. When you don't have access to your home Wi-Fi but have a stable 4G or 5G signal, you can turn your Redmi into a router. The hotspot settings menu in MIUI is also integrated with a QR code generator, allowing you to instantly share internet with other users.
To activate, go to the section Wi-Fi hotspot In the settings. Here you can set the network name (SSID) and password. Unlike the previous scenario, where we read data from the router, here you create the network parameters yourself. After setting the parameters, click the QR code icon to see the connection code.
Guests can scan this code and immediately access your mobile internet. However, be careful: sharing internet will use up your data. mobile trafficMake sure you have an unlimited plan or a sufficient gigabyte package to avoid unexpected charges.
⚠️ Attention: When using a hotspot, your smartphone may become significantly hotter and drain its battery faster. Avoid covering your device and, if possible, keep it charging during extended internet access.
You can also set a limit on the number of connected users and a timer in the hotspot settings. These are useful features for saving battery life and monitoring traffic. For example, you can set the hotspot to automatically turn off if no one is connected for 10 minutes.
Table: Comparison of connection methods
To better navigate the various connection methods, it's helpful to compare their characteristics. Different methods offer advantages depending on the situation: whether you're at home, visiting, or in a public space. Understanding these differences will help you choose the best option.
| Parameter | Manual input | QR code (Scan) | NFC (if available) |
|---|---|---|---|
| Speed | Low | High | Instant |
| Risk of error | High | Absent | Absent |
| Requirements | Knowing the password | Camera/Scanner | NFC module |
| Security | Average | High | High |
As the table shows, using a QR code strikes a balance between speed and accessibility. While NFC requires an NFC module in both devices, every modern smartphone has a camera. Manual entry remains the slowest and most error-prone method, especially on touchscreens.
Furthermore, a QR code allows for the transmission of not only the password but also the encryption type, eliminating security protocol conflicts. When entering the code manually, the user may accidentally select the incorrect security type in the advanced settings, resulting in a connection error. Automating the code solves this problem.
Scanning problems and solutions
Despite the convenience of this technology, sometimes situations arise where Redmi can't read the code or refuses to connect. Often, the problem stems from trivial issues: a dirty camera, poor lighting, or a damaged screen on the device from which the code is being read. A software glitch in the camera module can also play a role.
If the camera focuses but doesn't read the code, try adjusting the distance to the subject or the angle. Being too close may prevent the autofocus module from acquiring a clear image. Also, make sure there are no fingerprints or grease marks on the camera lens, as they could blur the image.
What should I do if the code has been read, but the connection does not occur?
If your phone sees the code but displays "Authentication Error" or "Incorrect Password," the password may have been changed on the router after the code was generated. In this case, you'll need to request the current code again from the network owner. Another possible issue is band incompatibility (2.4 GHz vs. 5 GHz).
Another common cause is a software conflict. Sometimes the system Scanner or Camera app may freeze. In this case, a simple restart of the smartphone or clearing the camera app cache through the application management menu will help. Also, check that camera access for system services isn't blocked in the privacy settings.
Security and privacy settings
When using QR codes to connect, it's important to remember security. The QR code you show to guests contains your network password in clear text (for those who know how to decode it). Therefore, don't share screenshots of this code publicly on social media or send it to strangers in public chats.
For guests and temporary users, routers often have a "Guest Network" feature. It's recommended to set up a separate SSID for guests on your router and generate a QR code specifically for that network. This isolates your personal devices (smart home devices, NAS storage, printers) from other people's smartphones, improving overall security. cybersecurity.
You can also hide your network's SSID in the Redmi settings, but in this case, the standard QR code connection may not work, as the network name isn't broadcast. Hidden networks will still require manual entry of parameters, which is a tradeoff between convenience and privacy.
FAQ: Frequently Asked Questions
Is it possible to connect Redmi to Wi-Fi without a password, using only a QR code?
Yes, that's the basic idea behind the technology. The QR code contains an encrypted password, so you don't need to visually know it. However, the code itself must be generated by a device that already has network access or knows the password.
Why doesn't the Redmi camera see the Wi-Fi QR code?
The "Document Scanner" or "Google Lens" feature may be disabled in the camera settings. Also, check whether the app's internet access is blocked (for initial verification of certain types of codes) or whether the brightness level on the source device's screen is set too high.
Does this method work on older versions of MIUI?
Basic QR code scanning functionality was introduced in Android 10 and later versions of MIUI (starting around MIUI 11/12). Very old devices may require installing a third-party scanner app from Google Play.
Is it safe to scan QR codes from unknown sources?
Scanning Wi-Fi connection codes is safe, as they only contain network information. However, be wary of QR codes from advertisements or strangers, as they may lead to phishing sites or install malware if the code contains a link rather than network details.
How can I save my network's QR code so I don't have to search for it every time?
The easiest way is to take a screenshot of the code as it appears in the Wi-Fi settings. You can also use widgets on your home screen if your MIUI version supports the "Quick Connect" widget or a similar one.