Owners of Xiaomi, Redmi and POCO smartphones often encounter mysterious system log entries labeled WLAN logs.These data accumulate in the background and can take up a significant amount of memory, causing concern for users who do not understand their purpose.In fact, it is a standard mechanism of the Android operating system and the MIUI shell (or HyperOS) designed to track the activity of a wireless module.
When your phone connects to the router, the system records every action, from trying to scan networks to successfully transfer data packets. WLAN logs contain detailed information about timestamps, MAC-Understanding the structure of these records not only frees up space on the device, but also reveals the causes of unstable connection or battery discharge.
In this article, we will go into detail about why these files are needed, how to read them correctly, and whether to delete them. You will learn what parameters affect Internet speed and why a phone can lose network at the most inopportune moment. Log analysis is the first step to professionally diagnosing network problems.
What are WLAN logs in the Android system
WLAN Logs are text files generated by a system demon. wpa_supplicant And the Wi-Fi framework services, which record the chronology of all the wireless interface events, and for the average user, it's a set of obscure lines, but for the engineer or advanced user, it's a map of all the interactions of the smartphone with the ambient air.
Each log entry has a time stamp and a level of importance. The system classifies events as informational (INFO), warning (WARNING) or critical errors (ERROR), for example, when switching between access points or changing the router channel, the corresponding record is entered into the file.
⚠️ Note: Do not manually delete system log files through the file manager unless you know the exact path.This may cause the network module to malfunction and require the device to restart.
It is important to distinguish between regular activity logs and debugging logs: the former are stored in secure partitions of the system and rotated to take up a minimum of space, the latter can grow to gigabytes if the developer mode is turned on and detailed logging is activated.
- 📱 Identifiers: MAC-router and phone addresses, SSID network.
- ⏱️ Time stamps: Exact connection and disconnection times.
- 📡 Signal parameters: Level RSSI frequency-band.
The main reasons for errors in the logs
When you analyze the contents of a file, you can find different error codes. One of the most common causes of problems is conflict. IP-addresses or misalignments DHCP. When Xiaomi smartphone can not get the correct address from the router, the log appears record of failure state.
Another common problem is security protocol incompatibility: If the router is set to work only in WPA3 mode, and the old device only supports WPA2, the logs will cycle into an authentication error, and the system will try to connect, fail, and try again.
Also worth noting is the interference in the air: in dense urban areas, hundreds of networks operate on the same frequencies. Interference leads to packet loss, which is recorded in logs as poor communication quality or timeouts of the response from the access point.
- 🔒 Auth failed: Incorrect password or type of encryption.
- 🔄 DHCP failed: Router didn't give IP-address.
- 📉 Low RSSI: Too weak signal for stable operation.
Where to find and how to read log files
The most common way to access technical data on Xiaomi devices is to use superuser rights (root) or debugging tools. The standard path to Wi-Fi system logs is usually at /data/misc/wifi/, but this folder is not accessible to regular applications.
A more affordable way is to use an engineering menu or network monitoring apps, and in an engineering menu called by the Phone app code ##6484##, you can run WLAN tests. Test results are often stored in a separate report file.
adb logcat | grep -i wifiThis command, run through a computer and an ADB debugger, allows you to output Wi-Fi logs in real time, and it's the most powerful diagnostic tool, because it shows you how you connect live, and you'll see where you're going to crash, whether you're searching for a network, or you're connecting to an IP.
Can I read logs without a computer?
When reading logs, pay attention to keywords: SSID (name), BSSID (MAC-router address and reason_code. Code of reason for disconnection (e.g, 3 or 8) Can tell who initiated the connection breakup – phone or router.
Decoding error and status codes
Within WLAN logs, there are numerical codes that are standardized by IEEE 802.11. Understanding their meaning allows you to accurately diagnose the problem. For example, code 3 indicates that the node has left the network, and code 8 indicates that the connection has been severed due to the expiration of the latency.
A frequent "Deauthenticated" error means that the hotspot has forcibly severed the connection to your Redmi or Xiaomi phone, and the reasons can range from a simple router overload to setting up filtering for your phone. MAC-address.
| Error code | Description | Possible cause |
|---|---|---|
| Reason 2 | Previous authentication no longer valid | Failure of authorization, re-entry required |
| Reason 3 | Deauthenticated because sending node is leaving | The router is restarted or shut down |
| Reason 8 | Disassociated because sending node is leaving | Loss of signal or exit from coverage |
| Reason 15 | Disassociated due to inactivity | Energy savings shut down module |
Special attention should be paid to the statuses associated with IP Configuration. If the logs constantly flash "Obtaining IP address..." and then follow "Failed", the problem lies not in the radio module, but in the DHCP settings of the router server or in a crowded address table.
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Use static. IP-address in the Wi-Fi settings on the phone if DHCP It's unstable. It often solves the problem of constant reconnection.
The impact of logs on productivity and battery
The accumulation of a huge number of logs can negatively affect the operation of the smartphone. When the log file reaches a certain size, the system has to spend the resources of the processor on its rotation (deleting old records and adding new ones), This creates an extra load on the drive.
Also, the constant recording of data on flash memory increases the wear of the memory cell, although in modern smartphones this resource is quite large. More noticeable effect on the battery: if the Wi-Fi module is in a cycle of constant reconnection due to errors that it fixes in the logs, the charge is consumed much faster.
⚠️ Warning: Excessive growth of log file size (over 100 MB) can lead to slowdown of the interface MIUI Problems with running applications that depend on the network.
Xiaomi optimization sometimes aggressively closes the background processes, which is also written in the log as "killed by system." If you see a lot of such records, it may be worth adding important applications to the power saving exceptions.
Cleaning and resetting methods of network settings
If you notice that your phone is slow or Wi-Fi is unstable, clear your network settings.This action will delete all stored Wi-Fi passwords, Bluetooth and mobile network settings, and clear the cache of network logs.
To perform the reset, go to the Settings menu, then select Connection and Sharing (or "Wi-Fi") and find Reset Wi-Fi, mobile networks and Bluetooth. Confirm the action and restart the device.
☑️ Checklist before network reset
Once rebooted, the system will create new, clean configuration files, which often helps to resolve software conflicts that have accumulated after updating the HyperOS firmware or changing the router, and old, erroneous configurations will be removed.
- 🗑️ Cache Clearing: You can wipe cache partition via the Recovery menu.
- 🔄 Resetting: Completely removing network profiles.
- 📲 Update: Installation of the current version of the software from the manufacturer.
Preventing WLAN problems on Xiaomi
To avoid the emergence of critical errors in WLAN logs in the future, it is recommended to monitor the relevance of the router firmware.Manufacturers often release security patches and stability improvements that directly affect compatibility with Xiaomi smartphones.
Also avoid using third-party memory accelerators and cleaners, which can aggressively terminate Wi-Fi system services, causing log errors and disrupting background synchronization.
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Regularly restarting the router (once a week) prevents internal memory overflow and reduces the number of connection errors on phones.
If problems persist even after resetting and software updates, there may be a hardware malfunction of the antenna module, in which case the log analysis will show persistent hardware errors (Hardware Error), and you will need to contact the service center.