StackChan is an adorable open-source AI desktop robot co-developed by M5Stack and its global user community. At its core is the M5Stack flagship IoT development kit CoreS3, powered by an ESP32-S3 SoC with a 240 MHz dual-core processor, 16MB Flash, and 8MB PSRAM, supporting both Wi-Fi and Bluetooth LE. The main unit features a 2.0-inch capacitive touch display with a durable glass cover, a 0.3 MP camera, proximity sensor, 9-axis IMU (accelerometer, gyroscope, magnetometer), microSD card slot, 1W speaker, dual microphones, and power/reset buttons.
The robot body connects to the main unit and includes a USB-C port for power and data, a 700 mAh battery, and two feedback servos—one for 360° horizontal rotation, the other for 90° vertical movement. It also integrates 12 RGB LEDs, an infrared transmitter and receiver, a three-zone touch panel, and a full-featured NFC module.
The pre-installed firmware offers a rich set of features, including expressive animations, the XiaoZhi AI assistant, and support for iOS video calls, remote avatars, and device discovery among nearby StackChan units. It’s fully programmable via Arduino and UiFlow2, making it easy to customize behaviors and expand functionality.
Note: The product packaging and software development are still in progress. Final features and documentation may change. Thank you for your understanding.
Highlights
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Open‑source hardware & software – fully customizable.
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AI voice assistant – integrates with smart home and IoT devices.
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Compact desktop design – fun, interactive, and approachable.
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Maker‑ready platform – ideal for prototyping and education.
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Community‑driven project – born from global collaboration.
Technical Specifications
| Specification | Parameter |
|---|---|
| Main Controller | ESP32-S3 Xtensa® dual-core 32-bit LX7, 240 MHz 16MB Flash, 8MB PSRAM |
| Wireless Connectivity | 2.4 GHz Wi-Fi, IEEE 802.11 b/g/n Bluetooth® 5 LE Infrared receiver IRM56384 + infrared transmitter |
| Wired Connectivity | USB CDC & full-speed USB OTG GPIO, UART, I2C |
| Display | 2.0-inch IPS LCD, resolution 320*240, 65536 colors, ILI9342C driver Capacitive multi-touch, FT6336U driver |
| Camera | GC0308, 640*480, 0.3 MP |
| Sensors | Dual microphones, ES7210 audio codec Proximity sensor LTR-553ALS-WA 9-axis IMU BMI270 + BMM150 (accelerometer + gyroscope + magnetometer) Three-zone touch panel, Si12T driver Full-featured NFC ST25R3916 |
| Human Interactions | 1W speaker, AW88298 16-bit I2S power amplifier RGB LEDs WS2812C * 12 Power and reset buttons Power indicator LED |
| Expansions | microSD card slot Grove interface * 3 LEGO®-compatible mounting holes |
| Motors | 360-degree horizontal servo with feedback 90-degree vertical servo with feedback |
| Power | 700 mAh battery USB-C power and data Power management IC AXP2101, RTC BM8563 |
| Product Dimensions | 54.0 * 70.0 * 62.0 mm |
| Product Weight | 186.0 g |
| Package Dimensions | Work in progress |
| Gross Weight | Work in progress |
Applications
Your Lively Desk companion
Al Agent for Daily Life
StackChan can also be your daily assistant. Chat with it to get answers to everyday questions, set reminders, or control your smart-home devices and phone with simple voice commands.
A Cute Monitor
StackChan can be your little home guardian. Whether it’s keeping an eye on kids, checking on elders, or noticing unexpected visitors, you can stay in the loop right from your desk or through the app.
Full Control at Your Fingertips
Use the app to remotely control all of StackChan’s functions, such as expressions, movements, and smart-home, anytime and anywhere.
Copy Your Mood
Learning your expressions and repeating what you say, StackChan lets you communicate in a playful way. You can even use it remotely to interact with family, friends, or coworkers, especially on days when you’d rather not be on camera yourself.
Find your chan-mate
StackChan loves making new friends. Using the mobile app, you can find other StackChans looking for companions, helping your little buddy meet new pals and explore playful interactions along the way.
Make it Yours
Change how StackChan looks and behaves. Dress it up with outfits and stickers, tweak its reactions, or download creations shared by the community. Every StackChan can look and act a little differently, just like its owner.
Build it Deeper
StackChan is fully open-source, inside and out. From software and firmware to hardware design, everything is open to exploration. Build new functions, connect modules, and create your own ideas with MicroPython, Arduino, and open I/O.