7Semi SHT41 Temperature & Humidity Sensor Tiny Breakout with I2C Qwiic

7Semi SHT41 Temperature & Humidity Sensor Tiny Breakout (I2C Qwiic) Technical Information

Overview

The module is based on the Sensirion SHT41 temperature and humidity sensor IC, a high-precision digital environmental sensor integrated into a compact (tiny) breakout with Qwiic interface.

• Measures:

  • Temperature

  • Relative Humidity (RH)

   

• Output:

  • Fully calibrated digital data via I2C

   

• Special features:

  • Tiny form factor

  • Qwiic plug-and-play connectivity

   

Designed for compact, low-power, and high-accuracy sensing applications.

Working Principle

> ature sensing

Converts temperature variations digital signal

Humidity Measurement

• Uses a capacitive polymer sensing element

• Absorbs moisture capacitance change digital RH value

Digital Signal Processing

• Internal system:

  • Signal amplification

  • Analog-to-digital conversion

  • Factory calibration

   

Outputs linear, ready-to-use digital values.

Measurement Characteristics

Temperature

• Range: 40C to +125C

• Accuracy: 0.2C (typical)

Humidity

• Range: 0100% RH

• Accuracy: 1.8% RH (typical)

Electrical Characteristics

• Supply voltage: 1.08V to 3.6V

• Very low power consumption

• Suitable for:

  • Battery-powered devices

Communication Interface

I2C Interface

• Standard I2C communication

• Default address: 0x44

Qwiic Connector

• 4-pin JST connector:

  • VCC, GND, SDA, SCL

• Enables:

  • Solderless connections

  • Daisy-chaining multiple sensors

Internal Features

Factory Calibration

• Fully calibrated at manufacturing

• No external calibration required

Integrated Heater

• Built-in heater:

  • Removes condensatiin humid conditions

Multiple Measurement Modes

• High precision mode

• Low power mode

• Adjustable measurement timing

Low Drift & High Stability

• Maintains accuracy over long periods

Operating Behavior

Measurement Cycle

• Microcontroller sends I2C command

• Sensor performs measurement

• Returns temperature and humidity data

Fast Response

• Suitable for real-time environmental monitoring

Environmental Compensation

• Maintains accuracy across changing conditions

Mechanical Characteristics

• Tiny breakout PCB

• Qwiic-compatible connector

• Designed for:

  • Space-constrained designs

    racteristics

    • Operating temperature: 40C to +125C

    • Humidity range: 0100% RH

    Limitations

    • Sensitive to:

      • Condensation (heater mitigates this)

    • Requires:

      • Proper airflow for accurate readings

    • Slight delay depending on measurement mode

    Typical Pin Configuration (Qwiic)

    • VCC Power

    • GND Ground

    • SDA Data

    • SCL Clock

    Functional Role

    The module acts as a:

    • Temperature sensor

    • Humidity sensor

    • Compact environmental sensing unit

    trong>compact and high-performance environmental sensor that:

    • Measures temperature and humidity with high precision

    • Uses capacitive humidity + bandgap temperature sensing

    • Provides digital I2C output via Qwiic interface

    • Includes heater and multiple measurement modes

    • Is ideal for compact IoT and embedded systems

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