Adafruit STHS34PF80 IR Presence / Motion Sensor Breakout

Name: Adafruit STHS34PF80 IR Presence / Motion Sensor Breakout
Brand: Adafruit
SKU: TH2322
Price: 1424.0 INR
Availability: OutOfStock

SKU: TH2322

₹1,680.32

₹1,424.00 (Ex. of GST)

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Digital IR presence and motion sensor breakout with I2C output, up to 4m lens-free detection, onboard 3.3V regulator, level shifting, and STEMMA QT / Qwiic compatibility.

₹1,680.32

₹1,424.00 (Ex. of GST)

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Overview

Adafruit STHS34PF80 IR Presence / Motion Sensor is a digital infrared sensing breakout designed for presence and motion detection without the bulky Fresnel lens used on many traditional PIR modules. Based on the STMicroelectronics STHS34PF80, it can detect IR activity from objects such as people at distances of up to 4 meters, making it a practical choice for compact enclosures, smart lighting, automation, and interactive projects.

Unlike simple PIR sensors that usually give only a binary trigger, this board communicates over I2C and provides richer sensor data. You can read how much IR is being detected, check for presence and motion events, monitor temperature-related changes, and access ambient and object temperature values through supported software libraries.

The breakout is built for quick integration with maker and embedded platforms. It includes an onboard 3.3V regulator and level shifting, so it works with both 3V and 5V logic systems. Dual STEMMA QT connectors make solderless hookup and daisy-chaining easy, and they are also compatible with SparkFun Qwiic I2C cables. QT cable is not included.

Specifications

Technical details for the Adafruit STHS34PF80 IR Presence / Motion Sensor.

Brand	Adafruit
Model	STHS34PF80
Sensor Type	Infrared presence / motion sensor breakout
Detection Range	Up to 4 meters without lens
Interface	I2C
Default I2C Address	0x5A
Logic Compatibility	3V and 5V systems via onboard level shifting
Board Power Input	VIN: 3V or 5V
Field of View	80°
Connector System	STEMMA QT / Qwiic compatible

Highlights

No lens required, helping reduce size and simplify enclosure design
Reports presence, motion, and temperature-related events over I2C
Supports solderless integration with microcontrollers and SBCs
Works with Arduino, CircuitPython, and Python environments

Pinout

Main pins exposed on the breakout for power and I2C communication.

Pin	Name	Function
1	VIN	Power input, accepts 3V or 5V
2	3Vo	Regulated 3.3V output from onboard regulator, up to 100mA available
3	GND	Common ground for power and logic
4	SCL	I2C clock line
5	SDA	I2C data line
6	INT	Interrupt output, configurable in software over I2C

Wiring Notes

For a 5V board such as an Arduino Uno or Adafruit Metro, connect 5V to VIN. For a 3V board such as a Feather or Raspberry Pi class device, connect 3V to VIN. Then connect GND, SCL, and SDA as usual for I2C.

The built-in STEMMA QT connectors allow quick plug-and-play wiring to compatible boards and accessories, but a QT cable is not included.

Frequently Asked Questions

What does the Adafruit STHS34PF80 IR Presence / Motion Sensor Breakout detect?

It detects infrared activity for presence and motion sensing, and it can also report temperature-related changes over I2C. Compared with basic PIR modules, it provides richer digital data instead of only a simple trigger output.

What is the detection range of this sensor?

The breakout is specified for detection up to 4 meters without requiring a lens. The sensor has an 80° field of view.

Can this breakout be used with 3V and 5V microcontrollers?

Yes. The board includes an onboard 3.3V regulator and level shifting, so it can be powered from 3V or 5V VIN and used with both 3V and 5V logic systems.

How does this sensor connect to Arduino, Raspberry Pi, or other boards?

It uses I2C for communication, with SDA and SCL pins or the onboard STEMMA QT connectors. The STEMMA QT ports are also compatible with SparkFun Qwiic I2C cables for solderless hookup and daisy-chaining.

What is the default I2C address of the Adafruit STHS34PF80 breakout?

The default I2C address is 0x5A.

Does the board include a STEMMA QT cable?

No. The breakout has dual STEMMA QT connectors, but the QT cable is not included.

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