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[stcc4] Add documentation for Sensirion STCC4 CO2 sensor#6108

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will-tm wants to merge 1 commit intoesphome:nextfrom
will-tm:feature/stcc4-sensor
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[stcc4] Add documentation for Sensirion STCC4 CO2 sensor#6108
will-tm wants to merge 1 commit intoesphome:nextfrom
will-tm:feature/stcc4-sensor

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@will-tm
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@will-tm will-tm commented Feb 17, 2026

Description:

Add support for the Sensirion STCC4 miniature CO₂ sensor based on thermal conductivity measurement.

The STCC4 features a dedicated I²C controller interface for an onboard SHT4x sensor, providing
automatic temperature/humidity compensation and readings alongside CO₂ concentration. For boards
without an onboard SHT4x, external RHT compensation is supported via temperature_source and
humidity_source configuration options.

Implementation details aligned with the official Sensirion embedded driver.

Pull request in esphome with YAML changes (if applicable):

Checklist:

  • I am merging into next because this is new documentation that has a matching pull-request in esphome as linked above.
    or

  • I am merging into current because this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.

  • Link added in /components/_index.md when creating new documents for new components or cookbook.

New Component Images

If you are adding a new component to ESPHome, you can automatically generate a standardized black and white component name image for the documentation.

To generate a component image:

  1. Comment on this pull request with the following command, replacing component_name with your component name in lower_case format with underscores (e.g., bme280, sht3x, dallas_temp):

    @esphomebot generate image component_name
    
  2. The ESPHome bot will respond with a downloadable ZIP file containing the SVG image.

  3. Extract the SVG file and place it in the /static/images/ folder of this repository.

  4. Use the image in your component's index table entry in /components/_index.md.

Example: For a component called "DHT22 Temperature Sensor", use:

@esphomebot generate image dht22

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