Xiaomi’s Rarely Used Bluetooth Devices: Secret Features and Hidden Potential

Xiaomi’s ecosystem is known not only for smartphones and fitness bracelets, but also for dozens of non-obvious Bluetooth gadgets that most users don’t even know about, often overshadowed by flagship products, but also for unique tasks ranging from monitoring sleep with medical precision to automating a smart home at the professional level, the problem is that documentation on them is scarce and retailers rarely understand their real capabilities.

In this article, we will break down the little-known Xiaomi Bluetooth devices that go beyond standard headphones and trackers: from the Mijia Smart Tag with undocumented features to the Xiaomi Mi Temperature and Humidity Sensor 2, which can not only show the weather, but also prevent mold in the apartment. You will learn how to connect them correctly, which hidden settings to activate through Mi Home or alternative applications, and where to buy them in 2026.

We'll focus on compatibility issues, because many of these gadgets are not officially supported outside of China, but there are workarounds, and we'll also cover a few life hacks, like how to use the Xiaomi MiJia Bluetooth Button to control a smart home without a smartphone, or how to turn the Mijia Honeywell Smoke Detector into part of the security system with notifications in Telegram.

Top.-5 The most obvious Bluetooth devices Xiaomi

If you think you know all Xiaomi gadgets, you're probably wrong. Here are five devices that are rarely seen in reviews, but can dramatically simplify everyday life:

• 🔍 Mijia Smart Tag is not just a tag for finding keys, but a full-fledged motion sensor with a history of movement (works even without the Internet).
• 🌡️ Xiaomi Mi Temperature and Humidity Sensor 2 is the only sensor in the lineup with Bluetooth Mesh support, which allows you to build networks of 30+ device.
• 🔘 MiJia Bluetooth Button is a programmable button that can run scripts in Home Assistant or send SMS.
• 🚬 Mijia Honeywell Smoke Detector – smoke detector with a 10-year battery that can distinguish steam from a real fire.
• 💤 Xiaomi Mi Smart Sleep Monitor - a device under the mattress, analyzing the phases of sleep without wearing on the body (more precisely, many smart watches).

Interesting fact: most of these gadgets are not officially sold in Russia and Europe, but they can be ordered on AliExpress or in Chinese stores with delivery. LYWSD03MMC, not obsolete LYWSD02).

How to connect rare Bluetooth gadgets Xiaomi to Mi Home

The main problem with little-known devices is that they are not visible in the standard list when added to the Mi Home.

1. Install the latest version of Mi Home (preferably Chinese or international 4.6.300)+).
2. Switch the region to China in the profile settings.
3. Click Add Add the device → Other devices → Manually.
4. Enter the name of the model (for example, LYWSD03MMC temperature-sensor).
5. If your device is not located, use alternative apps like Home Assistant or Aqara Home.

Important: Some devices (such as the Mi Smart Sleep Monitor) require binding to a Chinese Mi Account. Without this, they will only work in guest mode with stripped-down features.

Install the Chinese version of Mi Home|Create a backup account in case of blocking|Prepare an interpreter for Chinese instructions|Check compatibility with your smartphone (Android) 8+/iOS 12+)|Have a resetting needle on hand (in case of errors)

-->

If the device is connected, but the data is not updated, check:

• 📶 Distance to router (for some sensors maximum - 10 meters without obstacles).
• 🔋 Charge level (for example, Smart Tag discharges for a charge level) 2-3 months with active use).
• 📱 Bluetooth version on your smartphone (needs Bluetooth 5.0)+ steady-work).

Mijia Smart Tag features: more than just a tag

Mijia Smart Tag (model) XMYD01FM) At first glance it seems like a regular tracker for keys, but in fact it is a multifunctional sensor with undocumented capabilities:

The most useful feature is smart home integration, so you can customize a scenario where if the tag is approaching the door (motion sensor is activated), the lights are turned on and the robot vacuum cleaner is launched.

1. Open Mi Home → Automation → Create a script.
2. Choose a Mijia Smart Tag Trigger → Movement detected.
3. Add actions (e.g., enable Yeelight).
4. Save it and test it.

Xiaomi Mi Temperature and Humidity Sensor 2: Professional Climate Monitoring

Sensor. LYWSD03MMC — It is not just a thermometer, but a tool for monitoring the microclimate with precision. ±0.3°C and Bluetooth Mesh support, key features:

• 📊 Long-term statistics: save data for 365 days (unlike budget analogues with 30 days of memory).
• 🔄 Mesh network: You can link up to 30 sensors into a single network to cover a large area (such as a greenhouse or office).
• ⚠️ Alerts: notifications when leaving the specified thresholds (for example, humidity) >70% = mold-risk).
• 🔋 Autonomy: battery CR2032 hold on 1.5-2 yearly updates to the data each 10 minute.

For maximum accuracy, place the sensor:

• At a height of 1.5 meters from the floor (avoid direct sunlight).
• Far from heat sources (batteries, kitchen stove).
• In a room with minimal air circulation (for example, not near the air conditioner).

Critical feature: this sensor does not work with Wi-Fi directly. Remote monitoring requires a Bluetooth gateway (for example, Xiaomi Bluetooth Gateway or a smartphone with a permanent connection).

MiJia Bluetooth Button: a programmable button for a smart home

MiJia Bluetooth Button (model) WXKG01LM) It looks like a normal wireless button, but it's actually a universal trigger for all scenarios:

• 🔦 Light control (single press - turn on, double - turn off).
• 🚪 Signaling (prolonged pressing) = anxiety).
• 📱 Remote control of the smartphone (for example, launching a voice assistant).
• 🔄 Automation (pressing) → vacuum-stack).

To adjust the button:

1. Add it to Mi Home as a "Smart Button".
2. Go to Automation. → Create a script.
3. Select a trigger (single/double/long-press).
4. Set up an action (e.g. enable Xiaomi Smart Plug).

Advanced life hack: If you plug a button into Home Assistant, you can set up a notification to Telegram or even a phone call.

automation:


- alias: "SOS button"




trigger:




platform: event




event_type: mihome_button




event_data:




key: "1000" # long press




action:




service: notify.telegram




data:




message: "Alarm! SOS button pressed!"

💡

The MiJia Bluetooth Button can work without the internet – all scripts run locally via Bluetooth if compatible Xiaomi devices are used.

Mijia Honeywell Smoke Detector: Smart smoke detector with 10-year battery

Mijia Honeywell Smoke Detector (model) JTYJ-GD-01LM/BW) stand out:

• 🔋 10 years of battery life (built-in battery, no replacement required).
• 🚨 Distinguish smoke and steam (does not work falsely when cooking).
• 📡 Bluetooth + Zigbee (works both independently and in a smart home system).
• 🔊 85 dB volume (audit even in a large apartment).

To connect:

1. Install the sensor on the ceiling (optimally - in the center of the room).
2. Add to Mi Home through the "Security" section.
3. Set up notifications in Settings → Alerts.

Important nuance: the sensor is not compatible with Russian standards of fire alarm (GOST R) 53325-2012), It can only be used as an additional means of warning, not as a primary means of communication.

⚠️ If the sensor starts to beep every time 30 Seconds are not a malfunction, but a low battery charge signal (although the manufacturer claims that the battery is not a fault). 10 In practice, this happens through years of work. 5-7 You can only reset the sound by replacing the device.

Xiaomi Mi Smart Sleep Monitor: Medical analysis of sleep without wearable devices

The Mi Smart Sleep Monitor (Model) MMC-01-ZM) — This is a touchpad under the mattress that analyzes the:

• 💤 Sleep phases (light/deep)/REM).
• 📈 Heart rate.
• 🛌 Movements and postures in dreams.
• 🌡️ Temperature and humidity around the bed.

Advantages over smart watches:

For maximum accuracy:

• Place the panel strictly under the chest.
• Use a mattress no more than 30 cm thick.
• Connect to the outlet (operates from the network, but there is a backup battery).

⚠️ Note: The device is not intended to diagnose sleep apnea or other medical findings, and its data are advisory and do not replace the consultation of a doctor.

Where to buy rare Bluetooth devices Xiaomi in 2026

Most of the devices in this review are not officially sold in Russia and Europe, but they can be found:

• 🛒 AliExpress is the widest range, but the risk of running into a fake%+ and Russian reviews.
• 🏬 Banggood – There are often promotional prices, but delivery is longer (3-4 weekdays).
• 📦 Chinese shops (Taobao, 1688) - lowest prices, but need intermediaries to deliver.
• 🇨🇳 Official store.xiaomi.com – only for those with a Chinese shipping address.

Average prices for rare gadgets (July 2026):

Before buying, check:

• 📄 Compatible with your region in Mi Home (some devices only work with a Chinese account).
• 🔌 Power adapter (for example, Sleep Monitor comes with a Chinese plug).
• 📦 Components (often sellers save on batteries or mounts).

FAQ: Frequent questions about rare Xiaomi Bluetooth devices