Xiaomi’s robot vacuum cleaners have evolved from simple devices with basic navigation to advanced gadgets with a high-end design. LDS-But how do you know which generation your model is from? It depends on the compatibility with the application, the features available and even the ability to upgrade the firmware.
In this article, we will discuss 5 reliable ways to determine the generation of Xiaomi robot vacuum cleaner — from the analysis of markings on the body to hidden data in proprietary software. You will learn how to distinguish Mi Robot V1 from V2, why Viomi is not always related to Xiaomi, and what to do if the serial number is erased. And also — a unique table of correspondence models and generations from 2016 to 2026, which is not on official resources.
1. Generations of Xiaomi Robot Vacuum Cleaners: A Brief History
Xiaomi launched the first robot vacuum cleaner, the Mi Robot Vacuum, in September 2016, and since then the lineup has been divided into several branches, each of which is of a specific generation.
- 🔹 1st Generation (2016–2017): Mi Robot Vacuum (no index) and Mi Robot Vacuum V1. Basic navigation, no cleaning areas support.
- 🔹 2nd Generation (2018–2019): Mi Robot Vacuum V2, Mi Robot Vacuum-Mop. Appeared. LDS-lidar and virtual walls.
- 🔹 3rd generation (2020–2021): Mi Robot Vacuum-Mop 2, Mi Robot Vacuum-Mop 2 Pro. Double side brushes, improved water tank.
- 🔹 4th Generation (2022–2023): Xiaomi Robot Vacuum Series X10, Ultra. 3D-Scanning, automatic water change, AI navigation.
- 🔹 5th generation (2026): Xiaomi CyberVac and updated Ultra. Fully brushless design, Matter support.
Importantly, some models (such as the Viomi V2 or Dreame D9) are released under Xiaomi partner brands, but are not pure Mi Robot generations.
Method 1: Model determination on the body
The fastest way is to look at the markings on the bottom or back of the device.
- 📌 MJJS02YM — Mi Robot Vacuum V1 (1st generation).
- 📌 SDJQR02RR — Mi Robot Vacuum V2 (2nd generation).
- 📌 STYJ02YM — Mi Robot Vacuum-Mop 2 (3rd generation).
- 📌 SDJQR10RR — Xiaomi Robot Vacuum X10+ (4th generation).
If the label is erased, try to find it on the certification sticker (usually next to the label). QR-For convenience, we have compiled a complete list of codes in the table below.
| Generation. | Model | Device code | Year of release |
|---|---|---|---|
| 1st | Mi Robot Vacuum | MJJS02YM | 2016 |
| 2nd | Mi Robot Vacuum V2 | SDJQR02RR | 2018 |
| 3rd | Mi Robot Vacuum-Mop 2 Pro | STYTJ02ZM | 2021 |
| 4th | Xiaomi Robot Vacuum X10+ | SDJQR10RR | 2022 |
| 5th | Xiaomi CyberVac S10 | SDJQR20RR | 2026 |
⚠️ Note: If the body is marked with a code VIOMI.V2 or DREAME.D9, Your device is made by Xiaomi sub-brands, but not the main Mi Robot line.
3. Method 2: Checking through the Mi Home app
The proprietary Mi Home app (or Xiaomi Home for new models) displays the exact model and generation of the robot vacuum cleaner.
- Open Mi Home and select your vacuum cleaner from the device list.
- Go to Settings. → About the device.
- Find the Model and the hardware version.
Example: Mi Robot Vacuum-Mop 2 Pro
Model: STYTJ02ZM
Hardware version: 3.3.9_0046 (3-th generation)Find the device in the list |Open"Settings → About the device "|Write the model code |Contact with the table of generations-->
If Unknown Device is displayed in the app, upgrade your Mi Home to the latest version or reconnect the vacuum cleaner to your account.
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If the robot doesn’t show up in Mi Home, try resetting it to factory settings: press the Home and Power buttons for 5 seconds until the signal sounds.
4. Method 3: Analysis of the serial number (S/N)
The serial number (S/N) contains encrypted information about the year of issue and the lot, and it is located on a sticker under the dust collector lid or on the bottom.
[Factory letters] [Year/Month] [Party] [Individual code]
Examples of decryption:
- 🔢 C8M1234567 — Released in 2018 (8), December (M)=12 months. 2nd generation.
- 🔢 A3F9876543 — 2023 (3), June (F)=6 months. Probably 4th generation (X10 or Ultra).
⚠️ Warning: Viomi and Dreame serial numbers don’t follow this logic, and for them, the year of release doesn’t always coincide with the Xiaomi generation.
How to decode a month in S/N?
5. Method 4: Visual differences between generations
If there is no access to the marking or app, pay attention to the external signs:
| Generation. | Distinctive features |
|---|---|
| 1st | One side brush, no moping button, white body. |
| 2nd | Two side brushes, Mop button on the panel, black or white. |
| 3rd | Transparent water tank, touch buttons, silver edge. |
| 4th and 5th | Camera on the case, automatic station with drying function, display. |
Xiaomi Ultra (4th generation) models feature a round base with two tanks (clean and dirty water) and CyberVac (5th generation) has a completely flat body without a central brush.
Method 5: Verification of firmware and compatibility
Each generation supports certain versions of the firmware, such as:
- 📱 1-E generation: maximum firmware — 3.5.8_003020.
- 📱 3rd generation: supports Mijia Firmware with index 4.x.x.
- 📱 5th generation: requires HyperOS (firmware) 5.x.x).
You can find out the firmware version:
- In Mi Home: Settings → About the device → Firmware version.
- Using the voice assistant: say "What vacuum cleaner do I have?" (works since the 4th generation).
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If the firmware is older than 2020, but the robot looks like the 3rd generation, most likely you have a fake or a rebranded model (for example, Viomi under the guise of Xiaomi).
7. Frequent mistakes and how to avoid them
Users are often confused:
- ❌ Mi Robot Vacuum (1st generation) and Mi Robot Vacuum V2 (Difference: y V2 There's a Mop button.
- ❌ Xiaomi Mijia and Viomi. are different brands, both belong to the Xiaomi ecosystem.
- ❌ Dreame D9 Xiaomi X10. Dreame's other software and generations don't match.
If you bought a used vacuum cleaner, check it with IMEI (analogue of serial number for equipment) on the official site of Xiaomi.