Person Sensor by Useful Sensors

The Person Sensor, a product of Useful Sensors Inc., is a compact and efficient device that brings advanced computer vision capabilities to your fingertips. Equipped with a pre-programmed camera module, this sensor can detect and recognize faces in its vicinity and relay this information via the user-friendly Qwiic I²C interface. It also features an interrupt pin, TP1, to indicate the detection of any individuals.

The Person Sensor combines an image sensor and a microcontroller within a single board, making it a compact, low-power (~150 milliwatts), and cost-effective solution for adding facial detection and recognition capabilities to your project. It can identify the number and location of faces relative to the device, making it an ideal choice for projects that require human presence detection, face tracking, or personalized user experiences.

The Person Sensor is part of the SparkFun Qwiic Connect System, a comprehensive ecosystem of I²C sensors, actuators, shields, and cables designed for hassle-free prototyping. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector, ensuring easy assembly and error-free connections.

Features:

• Qwiic connector for the I²C interface
• Operating Voltage - 3.3V
  • 150mW power consumption
  • 5mW LED power consumption
• I²C bus speeds of up to 400k baud
• Image Sensor - 110-degree Field of View (FOV)
• Image scan rate - 7Hz without facial recognition
• Image scan rate - 5Hz with facial recognition active
• Privacy-focused design - restricts access to raw image data, only provides metadata from each frame.
• Pre-programmed microcontroller - firmware flashing & model updates not available.

Note: The sensor uses an internal image sensor, requiring a clear field of view and correct mounting orientation. You can identify the sensor side of the board by spotting the small lens in the center. The correct orientation is when the silkscreen writing “Useful Sensors Person Sensor V1.0” is upright.

Documents:

• Developer Guide

Examples:

• Auto-Lock your Laptop Screen with a Person Sensor
• Person Sensor Screen Locker
• Person Sensor with Pico C
• Person Sensor with Arduino
• Person Sensor with Raspberry Pi & Python
• Person Sensor with Circuit Python