Adafruit STHS34PF80 IR Presence / Motion Sensor – STEMMA QT / Qwiic

The Adafruit STHS34PF80 IR Presence / Motion Sensor detects motion, presence, and temperature changes up to 4 m away without needing a lens, using an I2C interface for detailed IR data. Mounted on a STEMMA QT/Qwiic-compatible breakout with a 3.3 V regulator and level shifting, it works with 3 V or 5 V logic, making it ideal for compact motion and presence detection projects.

We stock many low cost ‘Passive IR’ Presence / Motion sensors, and they’re very popular for detecting motion from humanoids and pets 5 to 20 feet away. (They possibly work on zombies, not guaranteed, depends on how warm they are).

The vast majority of PIR sensors use a chunky infrared receiver, a processing chip (sometimes integrated into the receiver) and a lens. However, this makes them kinda chunky. Also, most have a digital, or maybe analogue signal output – which makes them very simple.

The Adafruit STHS34PF80 IR Presence / Motion Sensor is like a deluxe version of the classic PIR sensor in that it has an IR sensing element that works up to 4 meters away and doesn’t require a lens, which makes it easier to integrate into small enclosures. It also comes with a full I2C interface so you can get detailed information about how much IR was detected, and whether there’s presence, movement, or temperature changes.

Nice sensor right? So we made it easy for you to get right into your next project. The surface-mount sensor is soldered onto a PCB and comes with a 3.3V regulator and level shifting so you can use it with a 3V or 5V logic microcontroller or single board computer without worry.

The custom-made PCB is in the STEMMA QT form factor, making them easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the STHS34PF80, or to chain it with a wide range of other sensors and accessories using a compatible cable.

The QT Cable is not included, but we offer a range of options here.

Features

• High-sensitivity infrared presence and motion detection sensor
• Reach up to 4 meters without lens for objects measuring 70 x 25 cm²
• Integrated silicon IR filter, SMD friendly
• Capable of detecting stationary objects
• Capable of distinguishing between stationary and moving objects
• 80° field of view
• Factory calibrated
• Low power
• Embedded smart algorithm for presence / motion detection
• Programmable ODRs from 0.25 Hz to 30 Hz
• One-shot mode
• IR sensitivity: 2000 LSB/°C
• RMS noise: 25 LSB RMS
• Operating wavelength: 5 µm to 20 µm
• Local temperature sensor accuracy: ±0.3 °C

Specifications

• Dimensions: 25.5mm x 17.6mm x 4.7mm
• Weight: 1.8g

Resources

• Datasheet
• Guide

Package Contents

• 1x Adafruit STHS34PF80 IR Presence / Motion Sensor – STEMMA QT / Qwiic
• 1x 6-pin header
  • The QT Cable is not included.