DFRobot Gravity: Offline Edge AI Gesture & Face Detection Sensor enables touchless gesture control and multi-person presence detection, designed for privacy-sensitive and real-time IoT applications. With a built-in AI processor and camera , this sensor recognizes five hand gestures and detects up to 10 faces or upper-body presences within a 3-meter range—all without cloud connectivity.
Featuring dual communication interfaces (I2C and UART) and wide voltage support (3.3V–5V), this module is fully compatible with Arduino, Raspberry Pi, ESP32 and graphical platforms like MakeCode and Mind+. It is ideally suited for smart home interfaces, touchless control systems, public interaction devices, and privacy-focused IoT solutions.
Key Features
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Offline edge AI processing with no cloud dependency
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Recognizes five intuitive hand gestures (e.g., thumbs up, peace sign)
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Detects and counts up to 10 faces or upper-body presences in real-time
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Wide detection range: 0.5 to 3 meters with 85° field of view
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Dual communication interfaces: I2C and UART
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Compatible with 3.3V and 5V systems
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Works with Arduino, Raspberry Pi, ESP32, MakeCode, and Mind+
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Low power consumption: only 100mA typical current draw
Edge AI Processing – Real-Time and Fully Offline
All gesture and presence recognition is handled by the onboard AI processor. This ensures maximum privacy, as no data is stored or transmitted externally. Perfect for public restrooms, hospitals, children's systems, and privacy-first smart devices.
Intuitive Gesture Recognition – Touchless, Contact-Free Control
Detects 5 predefined hand gestures within a range of 0.5 to 3 meters:
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Thumbs up
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Open palm
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Peace sign (index and middle fingers)
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Shaka sign (thumb and pinky extended)
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Three-finger gesture (middle, ring, and pinky extended)
Each gesture triggers a unique RGB indicator, simplifying visual feedback and development.
Multi-Person Detection with Face and Upper-Body Recognition
The sensor can recognize up to 10 faces or upper-body patterns simultaneously. Outputs real-time position data and presence count, ideal for:
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Smart HVAC and lighting automation
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People counting in commercial or public environments
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Interactive public kiosks or displays
Wide Field of View and Flexible Mounting
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85° diagonal field of view covers a wide detection zone
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Works reliably on walls, ceilings, desks, and inside enclosures
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Ideal for classrooms, conference rooms, hallways, or interactive installations
Applications
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Wireless Smart Home Gesture Controller
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Touchless Control Systems for Healthcare or Public Spaces
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Interactive Art and Educational Displays
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Smart People Counting Devices for Offices and Retail
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Privacy-Focused IoT Automation Systems
Specifications
| Category | Specification |
|---|---|
| Electrical | |
| Operating Voltage | 3.3V – 5V |
| Logic Voltage Level | 3.3V |
| Typical Current Consumption | 100mA |
| Communication | |
| Interface | PH2.0-4P / 2.54mm header |
| Protocols | I2C / UART |
| I2C Address | 0x72 |
| UART Baud Rate | 9600bps (Modbus protocol) |
| Interrupt Output | 2.54mm pin header |
| Recognition Capabilities | |
| Gesture Types Supported | 5 |
| Face / Upper-body Count | Up to 10 |
| Recognition Distance | 0.5m – 3m |
| Field of View | 85° diagonal |
| Camera Focal Length | 1.56mm |
| Confidence Score Output | 0 – 100 |
| Position Coordinate Output | Supported |
| Indicators | |
| Gesture RGB Indicators | |
| Blue: Thumbs up | |
| Green: Three-finger gesture | |
| Red: Open palm | |
| Yellow: Peace sign | |
| Purple: Shaka sign | |
| Presence LED | Lights up when presence is detected |
| Mechanical | |
| Dimensions | 42mm × 32mm |
| Mounting Holes | 25mm × 35mm, Ø 3.1mm |
Documents
Package Includes
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1 × Gravity: Offline Edge AI Gesture & Face Detection Sensor
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1 × PH2.0 - 4P Cable