Why Xiaomi AirDots Headphones Connect One at a Time and How to Fix It

You pulled out of the case Xiaomi AirDots, turned on Bluetooth on your smartphone, but instead of the usual stereo sound hear only one headphone? Or the second connects separately in a few seconds? This problem is familiar to many owners of wireless headphones Xiaomi — from the budget Redmi AirDots to the flagship Xiaomi Buds 4 Pro. 80% of the time, the fault is not the breakdown, and software failures or incorrect settings.

In this article, we’ll look at all the possible reasons why headphones connect one at a time, from the banal battery discharge to the hidden Bluetooth settings in Android/iOS. You’ll learn how to force the headphones to sync with each other, reset them to factory settings and avoid problems in the future. And for the most difficult cases, we’ve prepared a unique manual manual manual manual manual manual manual reflash of the Bluetooth chip through the engineering menu (works on 95% of Xiaomi models).

1.Why Xiaomi AirDots headphones are unfurling: the main reasons

First thing to understand: Xiaomi AirDots (like any other company) TWS-Headphones are made up of a master and a slave device, the lead headphone connects directly to the phone, and the slave headphone connects directly to the lead on a separate channel, and if this channel breaks, you hear the sound in only one headphone.

Here's the top.-5 The reasons why this happens:

• 🔋 A discharged battery in one of the headphones (even if the indicator is green, the real charge may be below 10%).
• 📱 Bluetooth firmware failures on your smartphone (especially after the update) Android/iOS).
• 🔄 Automatically reconnect to another device (e.g., a laptop or tablet).
• 🛠️ Software resetting of headphones after extraction from the case (if you held the button for too long).
• 📦 Physical damage to contacts in the case or headphones (oxidation, pollution).

The most insidious reason is Bluetooth protocol conflict, for example, if your smartphone supports Bluetooth 5.2 and your headphones are running Bluetooth 5.0, you may experience a synchronization delay, resulting in the lead earphone connecting immediately, and the slave earphone connecting after 5-10 seconds (or not connecting at all).

2. How to check which headphone is the lead, and which is the slave

Before you fix the problem, you need to determine which headphone is the host (it connects to the phone directly).

1. By sound: The lead earpiece usually emits a louder connection signal.
2. According to the indicator: on the leading headphone Xiaomi AirDots flashes red / white light, on the slave - only white.
3. With Bluetooth: On Android: Go to Settings → Bluetooth, find your headphones and click on the gear next to the name. If there is a "Disable microphone" item, this is the lead headphone. On iPhone: Settings → Bluetooth, next to the lead earphone, there will be a microphone icon.

If the headphones connect one by one, try to force the other headphone to lead:

Put both headphones in the case and close the lid.|Get only the headphone that should be the lead.|Hold the button on it for 10-15 seconds until double blinking.|Put him on the phone first.|Get the second headphone – it must connect automatically-->

Attention! If the headphones are still connected separately after this manipulation, the problem lies deeper in the firmware or hardware.

3. Step-by-step instruction: resetting and re-synchronization of headphones

If Xiaomi AirDots headphones are connected one at a time, the first step is a complete reset, which will remove all the saved connections and return the headphones to the factory settings.

Instructions for all models (except AirDots Pro 2 Lite):

1. Put both headphones in the case and close the lid.
2. Open the lid, but don't take out the headphones.
3. Press and hold the button on the case for 15-20 seconds until the indicator starts flashing red and white alternately.
4. Take the headphones out of the case – they should automatically synchronize with each other (you will hear the beep).
5. Put them back on the phone.

The most common hardware problem is a wire break between the battery and the Bluetooth module, which occurs when you drop your headphones or pull the wire when you remove it from the ear, which costs 800-1,500 rubles (depending on the model).

How to check the battery:

1. Put the headphones in the case and watch the charge indicator.
2. If one headphone charges 30% or more longer than the other, its battery degrades.
3. For accurate diagnosis, use the AccuBattery (Android) or Battery Life (iOS) app.

Attention! If Xiaomi AirDots headphones are in the rain or in a wet room, don't dry them with a hair dryer or battery! Place them in a silica gel bag (from a shoe box) for 12 to 24 hours. You can only turn them on after drying completely.

6. Firmware and engineering menu: advanced repair methods

If all previous methods have failed, you have to reflash the Bluetooth headphone module, which is suitable for advanced users and requires a Windows or Linux computer.

What you need:

• 💻 PC with Python 3.8 installed+ and libusb.
• 🔌 Type-C Cable (to connect the case to the PC).
• 📁 The firmware for your model (you can download it on the 4pda.ru or xiaomifirmware.com).

Step-by-step:

1. Download the TWS-Tool utility from GitHub.
2. Connect the case with headphones to the PC (earphones should be inside!).
3. Start the command in the terminal: python tws-tool.py --port COM3 --model AIRDOTS_PRO --flash firmware.bin (substitute COM3 to your port and AIRDOTS_PRO headphone-model).
4. Wait for the firmware to be completed (5-10 minutes).
5. After restarting, the headphones should sync automatically.

Attention! The wrong firmware can permanently disable your headphones. If you're not sure about your skills, contact Xiaomi's service center.

7. How to avoid problems in the future: prevention

To prevent Xiaomi AirDots from unsteaming again, follow these rules:

• 🔋 Charge your headphones correctly: Do not leave them in a case for more than 2-3 hours after full charge. Use the original Type-C cable (cheap cables can damage the power controller).
• 📱 Update your firmware: AirDots Pro 2 and newer updates are released via the Mi Home app. For older models, check for updates every 3 months on the newer model. 4pda.ru.
• 🛡️ Protect from moisture: Even if the headphones have protection IPX4, Don't use them in the pouring rain. After exercise, wipe your headphones with a dry napkin.

Useful Lifehack: If you frequently switch headphones between devices (like a phone) ↔ laptop), use the SoundAssistant (Android) or AirBuddy (iOS) app, which automatically reconnects AirDots when you change gadgets, avoiding conflicts.

💡

Keep your headphones in your case even at home – this protects them from dust and prevents accidental button pressing, which can reset settings.

FAQ: Frequent questions about connecting Xiaomi AirDots