Sipeed MaixCube - AIoT, Easy to Build a Facial Recognition System, Kendryte RISC-V K210
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Specification
| Kendryte K210 | |
|---|---|
| Core | RISC-V Dual-Core 64-bit, with FPU |
| Frequency | 400MHz (overclockable to 600MHz) |
| SRAM | Built-in 8M Byte |
| Image recognition | QVGA @ 60fps / VGA @ 30fps |
| Voice recognition | Microphone array (8mics) |
| Network Model | supports YOLOv3/TinyYOLOv2/face recognition, etc. |
| Deep learning framework | Support frameworks such as TensorFlow / Keras / Darknet / Caffe |
| Peripherals | FPIOA, UART, GPIO, SPI, PC, PS, TIMER |
| Hardware acceleration unit | KPU convolution operation accelerator |
| FPU floating point accelerator | |
| APU Audio processor | |
| FFT Fourier transform accelerator | |
| MaixCube Module | |
| Onboard Peripherals | Button x 3 |
| Camera x 1 | |
| RGB LED x 2 | |
| 1.3 inch TFT screen | |
| Electret Microphone x 1 | |
| 128Mbit Flash x 1 | |
| Accelerometer x 1 | |
| Onboard Interfaces | USB Type-C Interface |
| Audio interface (supports external speakers) | |
| TF card slot | |
| Grove standard interface | |
| SP-MOD interface (supports SP-MOD interface module) | |
| Power supply | USB-Type-C / Internal lithium battery (200mAh) |
| Software Development | |
| Operating system | FreeRTOS, Linux |
| Face recognition | Recognition accuracy up to 98% |
| Development environment | MaixPy IDE, PlatformlIO IDE, Arduino IDE, etc. |
| Programming languages | C, C ++, MicroPython |
Detailed Descriptions
A Wide Range of Sipeed Modules (SP-MOD) Supported
Through the SP-MOD interface on the MaixCube which is a standard 2.54mm 2x4 Pin female header, with Vcc, GND, and 6 signals, you can connect to various SP-MOD modules and extend your AI projects further.?

| 1 | Handle Module | 8 | SP-MOD One-to-Multi-Adapter Board |
|---|---|---|---|
| 2 | USB In-line Module | 9 | 1.14inch LCD module |
| 3 | Microphone Array Adapter Board | 10 | Single point ToFu Module |
| 4 | Weather Station Module | 11 | FPC Extension Module |
| 5 | PSRAM Module | 12 | Bluetooth Module |
| 6 | Credit Card Module | 13 | Ink Screen Module |
| 7 | Grove Adapter Board | 14 | LoRa Module |

1. 1.3 inch TFT screen
2. Reset button
3. Power button
4. Grove interface
5. SP-MOD interface
6. TF card slot
7. Camera
8. Type-C interface9. Three-way button
What is MaixPy?
Before getting to know about the MAIX product series, it is very necessary to understand the MaixPy project. It can help you quickly use the Al module.
MaixPy is a project of porting Micropython to K210 chip (running Micropython parser on K210), that is, users can finally control the function of K210 chip through Micropython programming. For example, you can directly call the facial recognition algorithm built into the firmware through Micropython programming, and finally generate a Micropython file, which can be downloaded to the Flash chip, and run on it. In addition, MaixPy supports the normal operation of MCU and integrates machine vision and microphone arrays to rapidly develop intelligent applications in the field of AIoT with extremely low cost and practicality.
What is the Development Environment on MaixCube?
By default, the development board has burned MaixPy firmware (the firmware source code is open source and can be downloaded from GitHub). MaixPy has developed a variety of functional libraries that developers can call directly. Maix series products use Maix IDE developed by the Sipeed team. The software is free of installation. After downloading, you can directly use MaixPy to use Micropython script syntax. Developers can edit the script on the computer and upload it to the development board to execute the script directly on the development board. The IDE can view camera images in real time and save files to the development board, which is very convenient for development.

In addition to MaixPyIDE, developers can also use ArduinoIDE, PIatformIO IDE, and other environments for development. Please refer to our technical information for details.
General Shipping Info
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- Order Changes & Cancellations
- Payment
- Shipping Address
- Shipping Methods, Time & Costs
- International Shipping & Customs
- Order Status
- Receiving Your Package
- Returns & Exchanges
- Warranty & Repairs
- Technical Support
- Buyer Protection
For any immediate assistance, reach us at shop@youyeetoo.com.
Order Changes & Cancellations
Cancelling or Changing an Order
- You may cancel your order or change the delivery address within 24 hours of placing it.
- Because most orders enter processing within 12 hours, we recommend contacting us as soon as possible. Once the status changes to “Processing”, the order can no longer be cancelled or altered.
- To request a change or cancellation, email shop@youyeetoo.com with your order number and details.
Refunds for Cancellations
- Cancelled before shipment: Full refund processed within 3 business days to your original payment method.
- Already shipped / rejected at delivery: The order cannot be cancelled. If you reject the parcel, we will refund the order total minus the original shipping fee after the returned package is received back at our warehouse.
Payment
Please visit our Payment Method page for available options.
If your order status shows “Pending / Waiting for T/T”, your payment has not yet cleared. Sending us a payment receipt can speed up the process.
Shipping Address
- Enter your shipping address in English, without special symbols. This helps the courier system recognise your address correctly.
- We ship to the exact address you provide. If you need to change it, notify us before the order enters “Processing” status.
- Tip: Save your frequently used address in your account for faster checkout.
Shipping Methods, Time & Costs
Dispatch Time
Most in‑stock products ship from Shenzhen, China within 1–3 business days.
Carriers & Transit Times
| Service | Carrier | Estimated Delivery |
|---|---|---|
| Premium Express | FedEx / UPS / DHL | 5–7 business days |
| Standard Express | YunExpress / EMS / 4PX / SF Express | 10–15 business days |
Tracking
Once your order is marked as “Shipped”, you will receive a confirmation email with a tracking number.
Track your order: Order Tracking Page (please ensure this link points to your live tracking tool).
Shipping Costs
Shipping fees are calculated automatically at checkout, based on your destination and package weight.
Local Delivery via Amazon
To help you avoid customs clearance hassles, we offer local shipping through Amazon in the USA and Europe. We are working to extend this to more regions.
International Shipping & Customs
We ship to the USA, all European countries, and many other destinations. If your country does not appear during checkout, contact shop@youyeetoo.com.
- International orders may be subject to customs duties, taxes, or import fees levied by the destination country.
- These fees are not included in your order or shipping total, and are the sole responsibility of the parcel recipient.
- We cannot predict or pre‑collect these charges; they are determined by local customs based on product value.
Order Status
- Pending / Waiting for Payment – Your payment has not cleared yet. Share your payment receipt to help us verify it quickly.
- Preorder – Contains items with a future release date. The entire order will ship together once all pre‑order items are available. Estimated ship dates are shown on the product page (subject to change with notice).
- Processing (Backordered) – Some items are temporarily out of stock. We are sourcing them. To receive available items first, please contact our support team.
- Shipped – Your package is on its way. A tracking number has been emailed to you.
Receiving Your Package
Inspect Before You Sign
Please check the contents of your parcel before signing the delivery receipt. If you sign without inspection, we cannot be held responsible for damage that occurred during transit.
“Delivered” but Not Received
Occasionally courier tracking (especially EMS) shows “delivered” a little early. Your package usually arrives within 1–3 days. In the meantime, we suggest:
- Checking with neighbours or your building reception.
- Contacting your local post office with the tracking number.
Missing or Lost Package
If a package is truly lost, email us at shop@youyeetoo.com with your order number and tracking number. We will file a claim with the carrier and work with you on a resolution.
Returns & Exchanges
Return Policy at a Glance
| Reason for Return | Who Pays Return Shipping? | Your Refund |
|---|---|---|
| Personal reason (30‑day no‑reason return) | Buyer pays return shipping | Product price minus original outbound shipping |
| Our error (defective, wrong item, transit damage) | We cover return shipping (label provided) | Full refund (including original shipping) |
30‑Day No‑Reason Return
If you change your mind, you have 30 days from the shipment date to return an item.
- Items must be unused, undamaged, and in their original packaging with all labels intact.
- Refunds are processed within 3 business days of us receiving the return, to your original payment method.
How to Start a Return
Email shop@youyeetoo.com with:
- Your order number
- Reason for return
- Clear photos or videos showing the product and any issues
Once approved, we will provide the return address. Please share the return tracking number once shipped.
Specific Return Scenarios
Defective Item
Contact us before returning. We will, upon verification, replace the item or issue a full refund.
Wrong Item Received
Mistakes occasionally happen. You may keep the incorrect item with a partial refund, or request the correct item. If we made the error, we will provide a free return shipping label to send the wrong item back.
Damaged During Transit
Please reject the delivery immediately if the package appears damaged. Then contact us with photos/videos. We will work with the carrier to expedite a replacement or full refund.
Missing or Lost Item
See the Receiving Your Package section above.
Warranty & Repairs
Standard Warranty
- Most boards come with a 12‑month limited warranty from the date of shipment.
- Covered: Manufacturing defects and hardware failures under normal use. We will repair or replace defective components free of charge, covering one‑way shipping back to you.
- Not covered (out‑of‑warranty repairs or excluded causes): Repairs will be charged. All costs (repair, shipping, handling) are the customer’s responsibility.
Important Note on Chip Damage
Damage to main chips/MCUs caused by misuse—such as overvoltage, reverse polarity, short circuits, liquid ingress, or improper firmware flashing—is not covered under free warranty. In these cases we will provide a paid repair quote based on the chip value.
Warranty Exceptions
This warranty does not cover damage resulting from:
- Operating environment not meeting national standards (overvoltage, overcurrent, lightning, high temperature, extreme humidity, vibration, etc.)
- External events (earthquake, fire, etc.)
- Human factors (liquid contact, abuse, oxidation, rust, dropping)
- Failure to follow official installation, usage, maintenance, or storage instructions
- Unauthorised modification, disassembly, or re‑assembly
- Natural wear and tear, cosmetic degradation, or breakage during use
- Any other issue not directly caused by design, technical, or manufacturing defects
Warranty Claim Process
To avoid delays, please email shop@youyeetoo.com with:
- Detailed description of the problem (What happened? When? How?) and your full order number.
- Steps you’ve already taken to resolve the issue.
- The item code printed on the outer packaging.
- Clear photos/videos showing the defect, taken under good lighting.
Technical Support
- We offer lifetime technical support to all customers.
- Search the youyeetoo Forum first—many common questions are already answered there.
- You can also contact us directly or post a question on the Forum for help with specifications, debugging, or setup.
Buyer Protection
Buyer Protection is a set of guarantees that lets you shop with confidence. You are protected when:
- The item does not arrive within the promised time.
- The item received is significantly different from the description.
- An item guaranteed as genuine turns out to be counterfeit.
Contact
For all the above matters, our support mailbox is:
shop@youyeetoo.com
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