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  • Home
  • Home Assistant Integration
  • Getting Started
    • ESP32 Boards & Modules
    • Sensors & Components
    • Schematics
    • Tools & Accessories
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    • Smart Home
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  • STM32 Guides
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Esp32.co.uk
  • Home Assistant Integration

ESP32 Indoor Air Quality Station: SCD41 + SGP40 + PMS5003 + SHT45

Quick Summary (TL;DR):A serious Home Assistant indoor-air-quality station should not try to turn one cheap “air quality” sensor into everything. Use SCD41 for true CO₂, SGP40 for VOC Index, PMS5003 for PM1, and SHT45 for the primary room temperature and…

  • panakos
  • 3 September 2026
  • Sensors & Components

SGP40 vs SGP41: VOC vs VOC + NOx for ESP32/Home Assistant

Quick Summary (TL;DR):The SGP40 and SGP41 are Sensirion metal-oxide gas sensors designed for indoor-air-quality monitoring with ESP32, ESPHome and Home Assistant. The biggest difference is simple: SGP40 measures VOC behaviour only, while SGP41 adds a second sensing pixel for oxidizing…

  • panakos
  • 1 September 2026
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