How to flash Xiaomi M365 scooter: expert guide

Xiaomi’s electric vehicle has become the industry standard, but over time, the standard functionality has become unsatisfactory for advanced users. The question of how to flash the Xiaomi M365 often arises when you need to unlock speed, change the recovery algorithms or simply update outdated software for stable operation. It is important to understand that the firmware of the controller is an intervention in the program code of the device, which can both improve the characteristics and lead to failure of electronics if you do not skillful actions.

There are several levels of modification, from simple upgrades through the official Mi Home app to deep flashing of the BMS (Battery Management System) and replacing drivers with modified versions. Each step requires preparation, understanding of the risks and having the necessary tools at hand. In this article, we will discuss all the methods relevant to the M365, Pro, Pro 2 and Essential models, paying special attention to the security of your data and battery.

Before you start any action, make sure that the battery level is at least 60%. interrupting the process of writing data to the controller’s memory at low charge can lead to irreversible consequences.

Selection of the method of updating: official vs. custom

The first step is always to define a target, and if you just want to keep things running smoothly and fix minor bugs, it's a formal update, and it's distributed through the company's servers and checked by the engineers for security. However, if your goal is to remove regional speed limits (e.g., overclocking with a speed limit). 20 before 25-30 km/h) or change the braking parameters, you will have to resort to custom firmware.

Official versions of software often contain locks that prevent the scooter from speeding above a certain mark depending on the region of sales. Custom firmware, such as Free Firmware or VESC modifications, remove these restrictions. Installing third-party software automatically voids the official manufacturer's warranty. This is a critical point that should be considered by owners of new devices.

There's also a difference between the engine controller's firmware and the BMS firmware. The first controls the motor, the second controls the battery cell state. You can't mix these concepts. There are time-tested versions for the engine, and for BMS experiments can be dangerous, because a battery control system that doesn't work properly can overheat or fire.

⚠️ Note: Do not try to install firmware from the Pro model to the usual M365 Or vice versa, without a deep understanding of the differences in hardware, which can cause Hall sensors to malfunction and crash.

Preparation for the procedure: tools and software

To do this successfully, you will need not only the scooter itself, but also a properly configured environment, and most users will still use a smartphone with the Mi Home app installed or specialized software like the M365 Tools (for Android) or the Xiaomi Scooter Hacking Utility (for iOS), which not only updates the software, but also reads diagnostic data.

If you're planning a more complex intervention, like flashing through a UART or using a programmer, you'll need a USB-TTL adapter, which allows you to connect to the controller's contact areas directly, bypassing the Bluetooth module, a technique that is necessary if the controller is "brickled" and no longer responding to wireless commands.

• 📱 Smartphone with Android 8.0+ or iOS 12+ Bluetooth-module.
• 🔋 External Power Bank to recharge your phone in the process if the procedure drags on.
• 💻 Laptop with Windows OS for working with console utilities and drivers (with deep modification).
• 🔧 Set of screwdrivers to open the deck if access to controller contacts is required.

It is also important to ensure a stable Internet connection when downloading firmware files. Corruption of the downloaded file is a common cause of write errors. Before starting work, it is recommended to take a screenshot of the current settings and battery performance, so that in the event of a reset, you can return the original parameters.

Step-by-step: Update via Mi Home

The safest way for a beginner is to use the regular functionality of the application. The algorithm of actions here is as simplified as possible by developers. First, you need to connect the scooter to the smartphone via Bluetooth, make sure that you are in close proximity to the device, ideally, no more than 1-2 meters.

Once connected, the app will check for updates. If the new version is available, a notification will appear on the screen. The process is as follows: you confirm the installation start, after which the scooter goes into update mode. At this point, the deck can flash indicators, and the engine can emit quiet clicks - this is normal, calibration or rewriting of memory sectors.

Do not attempt to scooter or pull the trigger during the process.The controller is fully engaged in recording data and does not respond to external control commands. Any sudden movement may be considered by the system as an error, which will lead to an interruption of the procedure.

Sequence of action:


1. Open Mi Home → Select the device.




2. Click on three dots (menu) → Check for updates.




3.Click "Update" and wait for progress bar 100%.




4. wait for the automatic reset of the scooter.

If the update hung on a certain percentage (e.g. 90%) for more than 10 minutes, there is likely a communication error, in which case you should try to restart the scooter (if it reacts) or turn off and re-enable Bluetooth on the phone, however, most often the system will roll back to the previous version if the bolt fails.

Controller modification and removal of restrictions

For those who choose to go beyond standard settings, the world of modified firmware opens up, with the main goal of increasing the maximum speed and changing the throttle response curve. Popular firmware versions allow you to increase the speed limit to 30-35 km / h, but this requires not only software, but sometimes physical intervention (replacing the controller with a more powerful one).

Custom software installation often requires the use of special downloading applications, one of the most famous is Danny's BMS Config Tool, or engine controller analogues, which allow you to download.bin firmware files directly into the device's memory, and it is important to strictly observe the compatibility of the hardware version and the software version.

When installing modified firmware, the algorithms for regenerative braking often change. The standard braking on the Xiaomi M365 is sometimes too sharp or weak. Castom versions allow you to adjust the braking force, making the stop more smooth and predictable, which is especially important when driving on wet roads.

The increased speed and current lead to more intense heating of the engine windings and controller elements. If the standard cooling system (which is essentially passive through the housing) fails, the thermal destruction of the semiconductor elements can occur.

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Expert advice: After installing the high-speed firmware, the first 10-15 minutes of the ride in gentle mode. Let the controller and motor warm up and "look down" to the new algorithms, periodically checking the temperature of the deck with your hand (caution, it can be hot).

Working with BMS: fine-tuning the battery

A separate and highly sensitive topic is the Battery Management System (BMS) firmware, which is responsible for balancing cells, protecting against overdischarge and overcurrents. Unlike the motor controller, errors are not allowed here. Incorrect BMS firmware can cause the battery to stop giving current or, worse, lose protection from short circuit.

The procedure is usually performed through a special connector on the board BMS using UART-This requires opening the scooter deck and access to the board itself, which is often covered with compounds or metal screens.

Why change the BMS firmware at all? The main reasons are: fixing errors in the display of charge (when the scooter turns off at 30%), unlocking the hidden capacity (if software limited), or calibrating the cutoff currents after replacing the batteries (cells 18650).

⚠️ Attention: Working with BMS Short circuits of the circuit board contacts with the battery connected can cause sparks, burns or fire. All manipulations are carried out only with the cell power connectors disconnected, if possible structurally.

There are BMS log readers that can diagnose the state of each cell individually, and they're a useful tool to check the health of the battery before buying a used scooter or before upgrading, and if the voltage difference between cells is large, software updates won't help, you need to physically balance or replace the cells.

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BMS firmware is a surgery for advanced users. If you are not confident in your abilities or have no experience with electronics, it is better to limit yourself to updating the engine controller via Bluetooth.

Diagnosis and Elimination (FAQ)

Users often face typical problems during the firmware process, and understanding the causes of these problems helps to avoid panic and better assess the situation, most often due to unstable Bluetooth connections or power interruptions.

If after updating the scooter behaves strangely (twitches, makes sounds), the first thing to try to reset to the factory settings (if such an option is on the menu) or reflash the device cleanly, pre-clearing the cache of the application on the smartphone. Sometimes the problem lies not in the scooter, but in the conflict of versions of the Mi Home application.

Also worth mentioning are regional features: Chinese firmware versions may differ from European or American versions in terms of additional features or, conversely, more stringent restrictions. When choosing a file for manual download, always pay attention to the region marking (CN, EU, US).

To sum up, the Xiaomi M365 firmware is a powerful tool to unlock the potential of your electric vehicle. However, like any tool, it requires respect and understanding of how it works. From simple upgrades to more complex modifications, you can protect yourself from fatal errors and enjoy improved driving dynamics.