SparkFun Mini Human Presence and Motion Sensor - STHS34PF80 (Qwiic)

The SparkFun Qwiic Mini Human Presence and Motion Sensor, featuring the STHS34PF80 Low-power, high-sensitivity infrared (IR) sensor from STMicroelectronics, is designed for precise presence and motion detection. This compact breakout board measures just 1.27cm by 2.54cm and includes two I²C Qwiic connectors, simplifying integration without the need for soldering. However, 2.54mm-spaced pins are also available for breadboard use.

Ideal for applications such as alarm systems, anti-intruder setups, smart lighting, and room occupancy monitoring, the STHS34PF80 sensor measures black-body radiation and ambient temperature within its 80° field of view. It employs a matrix of floating vacuum thermal transistors to differentiate between stationary and moving objects, effectively eliminating self-heating effects. These features make it a versatile tool for various detection needs.

Operating efficiently in diverse lighting conditions, the sensor is unaffected by visible light, thanks to its 5 to 20µm optical band-pass filter. With output data rates ranging from 0.25 to 30Hz and a single-shot mode accessible via I²C or SPI interface, it provides reliable performance across different environments.

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The SparkFun Qwiic Connect System is a streamlined ecosystem of I²C sensors, actuators, shields, and cables designed to expedite prototyping and reduce errors. All Qwiic-enabled boards feature a 1mm pitch, 4-pin JST connector to minimize PCB space requirements and ensure correct, polarized connections.

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Features:

Breakout Board

• Dimensions: 2.54cm x 1.27cm
• Two Qwiic Connectors
  • I²C Address (7-bit): 0x5A (Default)
• Two Mounting Holes:
  • 4-40 screw compatible
• Six PTH Pins
  • 3V3, GND, SCL, SDA, CS, INT
• Power LED (Red)

STHS34PF80 Features

• Voltage Range: 1.7 to 3.6V
  • Current Draw: 10µA
• Interfaces: I²C or SPI
• Optical wavelength: 5 to 20µm
• Range: 4m (objects 70 x 25cm² in size)
• Built-in Detection Algorithms:
  • Identify stationary objects
  • Distinguish between stationary and moving objects
• Field of View: 80°
• Output Data Rate: 0.25 to 30Hz
• IR sensitivity: 2000 LSB/°C
• RMS noise: 25 LSB_rms
• Operating Temperature: -40 to 85°C (default gain mode)
• Sensor accuracy: ±0.3°C (local)
• One-shot mode
• Factory calibrated

Documents:

• Schematic
• Eagle Files
• Board Dimensions
• Hookup Guide
  • Arduino Library
• Component Datasheets:
  • STHS34PF805 Product Page
    • STHS34PF805 Datasheet
• Qwiic Info Page
• GitHub Hardware Repo