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7Semi BME680 Temperature, Humidity, Pressure & Air Quality Sensor Breakout

7Semi BME680 Temperature, Humidity, Pressure & Air Quality Sensor Breakout

₹926.00Price
🌿 7Semi BME680 Temperature, Humidity, Pressure & Air Quality Sensor Breakout (Qwiic) — Technical Information
🔍 Overview
The module is based on the Bosch BME680 environmental sensor IC, a multi-sensor MEMS device integrating four environmental sensing functions:
  • Temperature
  • Relative Humidity
  • Barometric Pressure
  • Gas (VOC-based air quality)
👉 The Qwiic interface version simplifies connection using plug-and-play I²C cabling.
⚙️ Working Principle
🌡️ Temperature Sensing
  • Uses bandgap temperature sensing
  • Converts temperature variations → digital output
💧 Humidity Sensing
  • Uses a capacitive polymer element
  • Absorbs moisture → changes capacitance → digital RH
🌬️ Pressure Sensing
  • Uses a MEMS piezoresistive pressure sensor
  • Detects atmospheric pressure via diaphragm deformation
🧪 Gas / Air Quality Sensing
MOX (Metal-Oxide) Gas Sensor
  • Includes a micro-heater
  • Measures resistance changes when exposed to gases
Detection Mechanism
  • VOC gases interact with heated sensing layer
  • Resistance varies → converted into gas signal
  • Processed into IAQ (Indoor Air Quality index)
👉 Detects broad VOC presence, not specific gases.
📊 Measurement Characteristics
🌡️ Temperature
  • Range: −40°C to +85°C
  • Accuracy: ~±0.5°C
💧 Humidity
  • Range: 0–100% RH
  • Accuracy: ±3% RH
🌬️ Pressure
  • Range: 300–1100 hPa
  • Accuracy: ~±0.6 hPa
🧪 Gas / Air Quality
  • Measures:
    • VOC levels (indirect via resistance)
  • Output:
    • IAQ index (relative air quality)
  • Response time: < 1 second (gas sensing)
⚡ Electrical Characteristics
  • Supply voltage: 1.71V to 3.6V
  • Power consumption:
    • µA level (environment sensing)
    • Higher (up to mA) when gas heater active
🔗 Communication Interface
I²C Interface (Qwiic System)
  • Standard I²C communication
  • Typical address:
    • 0x76 or 0x77
Qwiic Connector
  • 4-pin JST connector:
    • VCC, GND, SDA, SCL
  • Enables:
    • Solderless connection
    • Daisy-chaining multiple sensors
🧠 Internal Features
✔ Multi-Sensor Integration
  • Combines 4 sensors in one compact IC
✔ IAQ Algorithm Support
  • Works with software (e.g., BSEC) to compute:
    • IAQ
    • CO₂ equivalent
    • Breath VOC
✔ Independent Sensor Control
  • Temperature, humidity, pressure, and gas sensors can operate independently
✔ High Resolution
  • Temperature: 0.01°C resolution
  • Pressure: 0.18 Pa resolution
✔ Low Power Modes
  • Sleep mode with ~0.15 µA consumption
🔄 Operating Behavior
✔ Multi-Parameter Measurement
  • Simultaneous sensing of environmental conditions
✔ Gas Measurement Cycle
  • Requires:
    • Heater activation
    • Stabilization period
✔ Environmental Compensation
  • Gas readings compensated using:
    • Temperature
    • Humidity
✔ Air Quality Output
  • Provides relative IAQ index, not exact ppm values
🌡️ Environmental Characteristics
  • Operating conditions:
    • Temperature: −40°C to +85°C
    • Humidity: 0–100% RH
    • Pressure: 300–1100 hPa
⚠️ Limitations
  • Gas sensing:
    • Not gas-specific (detects VOC mixture)
  • Requires:
    • Calibration algorithms for meaningful IAQ
  • Sensitive to:
    • Environmental changes
    • Sensor self-heating (minor temperature offset)
🔌 Typical Pin / Connector
Qwiic Connector (4-pin)
  • VCC
  • GND
  • SDA
  • SCL
🧩 Functional Role
The module acts as a:
  • Environmental monitoring sensor
  • Air quality (VOC-based) sensor
  • Weather and altitude sensing component
  • Multi-parameter IoT sensing node
🏁 Summary
The 7Semi BME680 Qwiic Breakout is a compact, multi-functional environmental sensor module that:
  • Measures temperature, humidity, pressure, and VOC-based air quality
  • Uses MEMS + MOX sensing technologies
  • Provides digital output via I²C (Qwiic interface)
  • Supports IAQ processing for air quality monitoring
  • Offers low power consumption with high integration
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