Modern Xiaomi and Redmi smartphones have a huge number of hidden features that are designed to improve the quality of life of the user. One of these features is a sleep mode, which is often confused with a simple alarm or Do Not Disturb mode. In fact, it is a comprehensive system for controlling the behavior of the device at night, allowing you to save battery power, reduce eye strain and avoid missing important notifications.
Users often experience a situation where the phone suddenly changes behavior: the screen stops responding to touch, the volume of the call becomes quieter, or, conversely, the alarm clock does not ring at the right time. It is important to understand that in MIUI and HyperOS, there are two types of “sleep”: the system mode of energy saving and the sleep function in the “Hours” application, the differences between them are critical for the correct configuration of the gadget.
In this article, we will take a closer look at how to manage these settings so that your smartphone behaves exactly as you want it to. We will look at standard activation methods through the system menu, working with alarm clocks and solving typical problems when the phone “falls asleep” too early or does not wake up on time.
Differences between System Mode and Alarm
The first thing you need to do before you start setting up is to understand what function you're dealing with. In MIUI and HyperOS shells, sleep mode can refer to different system processes, most commonly meaning digital well-being or settings within the Watch app.
The system mode, often associated with Digital Well-being, restricts app use at a given time, can make screens black and white, block social media access, and mute notifications, a tool for those who want to normalize their schedules and spend less time on their phone before bed.
On the other hand, there's a sleep mode in the Watch app, which works in conjunction with the alarm clock, and when you set the alarm, the system suggests you set your sleep schedule, during which time the phone can automatically turn on Do Not Disturb mode, blocking incoming calls (except for selected contacts) and messages so that nothing disrupts your rest.
- 📱 System mode: limits the functionality of the smartphone to combat addiction.
- ⏰ Mode in the Watch: Manages notifications and sounds during your rest period.
- 🔋 Energy saving: a separate feature that can confuse users with its name.
Schedule settings in the Appendix Clock
The most common use case is setting your rest schedule through the standard Watch app, and that's where the logic that links your bedtime to your smartphone behavior is, so you have to open the app and go to the Alarm tab.
At the top of the screen or in the settings menu (three dots or gears), you need to find a sleep mode or sleep schedule, and if you click on it, you will be taken to a menu where you can set the time of rest and rise, the system will calculate the duration of rest and suggest to adjust the behavior of the phone during this period.
So, you need to pay attention to the Repeat option, and if you want to, you've activated automatically every night, you have to choose the days of the week, otherwise the phone will behave as normal, and you'll have to manually turn on the mode every evening, and you'll also adjust the wake-up sound and the vibration.
☑️ Setting up the perfect sleep
Once the schedule is activated, the phone will go to rest at the specified time, the screen may become less bright, and notifications may become hidden, this is a normal behavior that helps not to be distracted by a glowing display in the middle of the night.
Managing Notifications and Do Not Disturb Mode
Key feature of sleep mode on Xiaomi
To avoid this, you need to set exceptions. Go to Settings → Sound and vibration → Do not disturb. Here you can create a list of favorite contacts whose calls will always go on, even if the silent mode is on, which is critical for emergency situations.
Also worth paying attention to the behavior of messengers: Some apps, such as Telegram or WhatsApp, have their own internal notification settings, which can overlap the system.
⚠️ WARNING: If you use third-party alarms, Xiaomi's system sleep mode can block them.Always use the standard Watch app to ensure you wake up.
You can also set up the automatic dark theme switch on, and it doesn't just save you the power. AMOLED-It also reduces eye strain if you still have to wake up your phone at night to check the time.
Digital Well-Being Functions for Time Control
Newer versions of MIUI and HyperOS offer deep integration with Google Digital Wellbeing, a tool that lets you not just lock your phone, but analyze your activity and suggest healthier habits.
In the Digital Well-Being section, you can find the Bedtime Mode feature, which is different from the clock mode in that it can completely change the desktop interface to make it monochrome. It's a powerful psychological trick: a gray screen doesn't make you want to browse through social media.
To activate, go to Settings → Digital Well-Being → Sleep Mode, where you can set up a smooth dimming of the screen according to schedule, which means that 15-20 minutes before bedtime, the brightness will gradually decrease, signaling the body to prepare for sleep.
- 🌙 Monochrome mode: turns the screen into black and white format.
- 🔕 Silence: Shuts down all sounds and vibrations.
- 📉 Darkening: smoothly reduces the brightness of the display.
Effects of Blue Light on Sleep
Automation through scripts and macros
For advanced users who don’t have enough standard settings, Xiaomi offers a powerful tool called Scenarios, a built-in automation feature that allows you to create complex chains of action when certain conditions occur.
You can create a script that will fire when you connect to the charger at night or when a certain time sets in, for example, you can set the sequence: turn on flight mode, start a sleep track, set an alarm clock and block the brightness of the screen.
To create a script, go to Settings → Additional → Scenarios. Press + to add a new rule. Select Time as a condition, and Flight Mode or Silent Mode as an action, giving you complete control over the behavior of the device.
| Parameter | Standard regimen | Scenario (Automation) |
|---|---|---|
| Activation. | On the alarm clock schedule. | For any trigger (time, geolocation, charge) |
| Flexibility | Limited by MIUI settings | Total discretion |
| Difficulty | Simple setup | It takes time to create. |
| Impact on the battery | Minimum | Depends on the actions chosen |
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Use the Charge at Night scenario to allow the phone to automatically turn on Do Not Disturb mode only when connected to the network after 23:00.
Problem Solving: The alarm clock doesn’t ring or the screen goes off
One of the most common problems Xiaomi users have is when the alarm clock doesn't ring because the system has "sleeped" too deep.Aggressive battery optimization in MIUI often kills background processes, including the watch app.
To fix this, you need to prevent the system from closing the Watch app. Go to Settings → Apps → All Apps → Find the Watch. Select Activity Control and set the No Limits value.
Also check the battery settings. In the Battery section, make sure that Super Power Saving Mode is not enabled while you sleep, as it can turn off the alarm clock. If the screen goes off too quickly, increase the sleep timeout in the screen settings.
⚠️ Warning: After updating the firmware, the energy saving settings may reset. Always check the permissions for the Watch app after the system update.
If the problem persists, try to delete the cache of the watch app.This won't delete your alarm clocks, but will clear temporary files that may have caused the timer to crash.
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The main reason for Xiaomi’s broken alarm clock is the system’s aggressive shutdown of background apps, and the solution is to ban auto-cleaning for the Watch app.