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Unit TMOS PIR

SKU: U185

Description

Unit TMOS PIR is a high-sensitivity infrared sensor unit for presence and motion detection, utilizing the STHS34PF80 chip solution. It communicates with M5 devices via I2C (default address: 0x5A). The working principle is based on the blackbody radiation principle described by Planck's law, which not only monitors ambient temperature but also detects human presence and motion. The sensor can distinguish between stationary and moving objects, with an 80-degree field of view, providing a wide detection range. Additionally, it supports adjustable sampling frequency and gain modes to meet the needs of different application scenarios. It is suitable for various applications such as alarm systems, smart lighting, and occupancy detection.

Notes
1. Setting the TMOS gain mode:
Default gain mode: High sensitivity, but prone to sensor saturation. Saturation can cause delays in updating the motion/presence detection flags;
Wide mode: Shorter detection range, but avoids sensor saturation.
2. Sensitivity to temperature differences: The output signal of the TMOS sensor is highly sensitive to the temperature difference between the sensor's ambient temperature and the room temperature being measured. This temperature difference may affect sensor measurements.
3. Power-down mode setting: When the device is in power-down mode, the register will revert to its default value each time the device is started or restarted. The calibration temperature needs to be reset. Therefore, if the application requires a wide operating temperature range and a temperature difference between the room temperature and the sensor's thermal coupling environment, the user needs to set the wide mode upon device startup.

Features

  • High-sensitivity infrared detection
  • Wide field of view
  • Presence and motion detection
  • I2C communication (0x5A)
  • Programmable output data rate

Includes

  • 1 x Unit TMOS PIR
  • 1 x HY2.0-4P Grove cable (20cm)

Applications

  • Presence and proximity sensing
  • Alarm/security systems
  • Furniture automation
  • Smart lighting
  • IoT
  • Smart lockers

Specifications

Specification Parameter
Sensor STHS34PF80
I2C address 0x5A
Measurement range Over 2 meters
Minimum detectable size 70 x 25 cm²
Field of view 80°
Programmable output data rate 0.25 Hz to 30 Hz
Infrared wavelength Infrared light in the 5 to 20µm range
Infrared sensitivity 2000 LSB/°C
Sensor accuracy ±0.3°C
Gain mode Default gain mode, wide mode
Product dimensions 32 x 24 x 8mm
Package dimensions 136 x 92 x 13mm
Product weight 4.4g
Gross weight 10g

Schematics

schematics

PinMap

Unit TMOS PIR

HY2.0-4P Black Red Yellow White
PORT.A GND 5V SDA SCL

Model Size

module size

Datasheets

Softwares

Arduino

UiFlow2

Video

Product Comparison

Product Chip Solution Measurement Range FOV Communication Features
TMOS PIR Unit (U185) STHS34PF80 2M 80° I2C (0x5A) Thermal radiation presence and motion detection
PIR Unit (U004) AS312 5M 100° IO Thermal radiation motion detection
Thermal2 Unit (U149) MLX90640 Depends on distance and material reflectivity 110° (32x24 pixels) I2C (0x52) Thermal imaging
NCIR2 Unit (U150) MLX90614 Depends on distance and material reflectivity 90° I2C (0x5A) Single-point heat temperature detection