SparkFun

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

Name: SparkFun Mini Human Presence and Motion Sensor - STHS34PF80 (Qwiic)
Brand: SparkFun
SKU: SF-SEN-23253
Price: 42.05 AUD
Availability: OutOfStock

· MPN: SEN-23253

All Products Breakouts Infrared & Thermal Sensors New Arrivals Sensors SparkFun Brands and Manufacturers Motion (PIR, ultrasonic) Sensors & Modules Sensors & Input Prototyping & Wiring SparkFun Qwiic Ecosystem

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The SparkFun Qwiic Mini Human Presence and Motion Sensor is built around the STHS34PF80 Low-power, high-sensitivity infrared (IR) sensor for presence and mot...

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The SparkFun Qwiic Mini Human Presence and Motion Sensor is built around the STHS34PF80 Low-power, high-sensitivity infrared (IR) sensor for presence and motion detection from STMicroelectronics. This sensor features an infrared motion and presence detection sensor with an operating wavelength between 5µm and 20µm. This Mini-sized breakout board is only 0.5in. by 1in. big and has been equipped with two I²C Qwiic connectors to make interfacing with the STHS34PF80 a bit easier. It’s part of SparkFun’s Qwiic connect system, so you won’t have to do any soldering to figure out how things are oriented. However, we still have broken out 0.1in.-spaced pins if you prefer to use a breadboard.

The STHS34PF80 sensor is designed to measure an object's precise black-body radiation (as described by Plank's law) and monitor ambient temperature conditions within its 80° field of view. The sensor comprises a matrix of floating vacuum thermal transistors MOS split into two parts, one exposed to IR radiation and the other shielded. The differential reading between the segments allows the sensor to remove self-heating effects. The STHS34PF80 also incorporates algorithms to detect and discriminate between stationary and moving objects. These features enable the sensor to work as a human presence and motion sensor in different applications such as alarm systems, anti-intruder systems, smart lighting, and room occupancy.

The sensor can operate in multiple lighting conditions and is unaffected by visible light or other bands thanks to the 5 to 20µm optical band-pass filter. The STHS34PF80 has output data rates between 0.25 to 30Hz and an available single-shot, accessed through its I²C/SPI interface.

The SparkFun Qwiic Connect System is an ecosystem of I²C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

Get Started with the SparkFun Qwiic Mini Human Presence and Motion Sensor

Features:

Breakout Board

Dimensions: 1.0in. x 0.5in.
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

Jargon buster

Plain-language definitions for the technical terms used above.

breakout: A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
LED: A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
LSB: Least significant bit (LSB) is the lowest-order bit in a binary number, the bit that some serial protocols send first or last. In analogue-to-digital and digital-to-analogue converters, one LSB also means the smallest step the device can resolve, equal to its full-scale range divided by the number of steps.
Motion detection: The ability to sense that something has moved, either by comparing successive camera frames or by using a dedicated sensor such as a PIR (infrared) or radar module. When a product lists motion detection, movement can be used as a trigger so a system only acts or records when there is activity rather than running continuously.
PCB: A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
PTH: Plated through-hole means the pin holes are metal-lined so solder connects the pad on both sides of the board. It is useful for connectors and headers that need a strong mechanical and electrical connection.
Qwiic: Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
RMS: RMS is a way of describing the effective level of an AC signal, such as an audio output voltage. It helps compare audio output levels more meaningfully than a peak voltage number.
SPI: A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.