Electric vehicle owners often face the need to update their device’s software, and the Xiaomi Mijia M365 Pro is no exception. The firmware procedure may be required to both gain new features and eliminate critical battery or controller errors. Unlike smartphones, the process has its own unique features that require strict adherence to the sequence of actions.
The main difficulty is that the Mijia or Xiaomi Home app does not always correctly complete the upgrade process, especially if the battery is below a certain threshold, there is also the risk of locking the controller when data transfers are interrupted. In this article, we will discuss in detail all the steps, necessary tools and methods for restoring the system in the event of a failure.
Before you start to act, you need to make sure that the integrity of the hardware, checking the voltage and contact status is the first step to a successful upgrade, ignoring basic safety requirements can cause the scooter to stop responding to commands or go into a deep sleep.
Preparation of equipment and diagnostics before firmware
You should start by visually inspecting and checking the current status of the device, make sure that the display does not burn error codes that can block the entry into the refresh mode. If the scooter turns on and shows the rest of the charge, this is a good sign, but relying on the indication alone is not worth it.
You’ll need a smartphone with an Android or iOS operating system to work. iPhone owners sometimes find it harder to establish a deep flash connection due to background limitations, so Android devices are considered more preferable for engineering tasks. Charge the phone fully, as the process can take 15 to 40 minutes of continuous screen and communication module operation.
⚠️ Note: Do not try to sew the scooter if the battery level (BMS) A sudden surge in voltage at the time of data recording in the memory of the controller can lead to irreversible damage to the battery cells.
It is also important to check the current firmware version. Often users try to "sweep" a device that already has the latest software, which leads to confusion, you can find out the version in the application or through special diagnostic tools. If the numbers match the latest releases on official forums, you may not need to intervene.
Necessary tools and software
To successfully perform the procedure, you will need specialized software. Standard operating system tools do not provide access to low-level data transfer protocols Xiaomi. The main tool for Android users will be the Xiaoyun Bootloader application or its analogues, such as DownG. These utilities allow you to forcely initiate the download mode and transfer the firmware file bypassing standard checks.
If you plan to work with the controller via a wired connection (which is recommended for the M365 Pro in case of serious failures, you will need an adapter UART to USB or a specialized programmer, but in 90% of cases, M365 Pro is quite wireless over Bluetooth, because the controllers of this model are equipped with a reliable communication module. BMS or replacing the controller with a custom.
Firmware files (.bin) must only be downloaded from trusted sources. Using modified versions of software from unknown developers can cause engine malfunction or even fire. Official files usually have a digital signature that the bootloader checks.
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Download firmware files only from the official GitHub community developers repositories or from the manufacturer's website. Files from questionable Telegram channels may contain malicious code.
Step-by-step: Update via Bluetooth
The most common scenario is to upgrade "over the air" or through a bootloader app, which is the least invasive and suitable for routine updates or fix minor bugs. First, make sure the scooter is off, but the battery is active.
Run the bootloader app on your smartphone and turn on Bluetooth. Press the power button on the scooter, but don't hold it for long — the device should just go to standby. The app will search for the device. Once the Mijia Electric Scooter appears in the list, select it.
Then you select the firmware file. The interface will tell you to specify the path to the.bin file. After selecting, the verification process will begin. The screen of the smartphone may go out - do not allow this, as the system can break the connection to save energy.
☑️ Checklist before running firmware
The progress bar can be displayed on the screen as you transmit data. It's important to stay within the device. Although Bluetooth allows you to stay within the room, it's better to keep your phone next to the steering wheel where the communication module is located. If the process is frozen by 99%, don't panic, sometimes it takes a long time to finalize the checksums.
Working with BMS: resetting and calibrating the battery
One of the most common reasons for turning to firmware is a BMS (Battery Management System) error: If the scooter shows an error of 11, 12 or 13, this often indicates a cell out of sync or a software failure of the battery controller, in which case a simple reboot does not help.
To reset the BMS, you often need to connect via wires to a service connector located under a plug above the charging port. You will need a USB-TTL adapter. The connection is done according to the scheme: TX to RX, RX to TX, GND to GND. Power (5V) is not necessary, the scooter will power the adapter itself.
Once connected to a PC and running a terminal program (like Putty or specialized BMS software), you will be able to see battery logs.The reset command often looks like a sent byte code that resets the cycle counter or resets the error flag. However, an improper reset of the BMS can lead to a loss of warranty and the inability to track the actual wear of the battery.
| Error code | Description of the problem | Method of decision | Difficulty |
|---|---|---|---|
| 11 | Low cell voltage | Balance Charging / BMS Reset | Medium |
| 12 | High cell voltage | Discharge / Checking the charging | Tall. |
| 13 | Low battery voltage | Long-term charging | Low. |
| 14 | High battery voltage | BMS diagnostics | Tall. |
| 15 | Protection against overcurrent | Reset / Checking the engine | Low. |
Calibration of charge readings is another important function: If the indicator on the display is lying (for example, it shows 50% and the scooter is turned off), a full discharge and charging cycle is required, sometimes with the forced writing of new threshold values into BMS memory.
Recovery after a failed firmware
If there is a power outage or communication loss during the upgrade, the controller can go into the “brick” mode, in which case the scooter does not respond to the on button, and the display does not light up, which means that the bootloader is damaged or can not find the executable code.
The most common way to recover the M365 Pro is to use the "forced flashing" method, which involves connecting the scooter to the charger and simultaneously slamming the power button and the brake (or gas, depending on the controller modification), while holding them, plugging the charger in. If the controller is alive, it can go into DFU (Device Firmware Upgrade) mode.
⚠️ Warning: If the scooter stopped responding after firmware, do not immediately try to disassemble the battery compartment. High voltage on the battery contacts is life-threatening. First, eliminate software recovery methods.
At worst, you'll need to solder out the memory chip and the firmware with the programmer, or replace the controller entirely. However, the M365 Pro is characterized by high survivability of stock controllers, and the software rollback through the engineering menu often brings the device back to life.
What if only one red dot is on fire?
Frequent problems and their solution
Even if you follow all the instructions, there are some unexpected complications, and one of the most common is that you can't find a device in the Bluetooth list, and this can be because the module is stuck. 10-15 Then plug it back in. That'll completely power out the electronics.
Another problem is the digital signature verification error, which happens when you try to install custom firmware on a device with updated factory software. Some newer versions of controllers have third-party protection, in which case only waiting for a bootloader patch to come out or using special exploits, if they exist for your board revision, helps.
Users also complain that the regenerative brake is missing after the firmware, often due to the wrong region in the application settings or the firmware itself. In the European version (EU), recovery works differently than in the Chinese version (CN).
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Most firmware problems are solved with a quality charger and a stable Bluetooth connection.Don't skimp on power supply during the upgrade.