# SCD41-2HA – CO₂ measurement for Home Assistant

The SCD41-2HA module measures CO₂ (carbon dioxide) is designed for direct integration into Home Assistant using the ESPHome integration.

- **Seller:** [Devices for Home Assistant](https://www.lectronz.com/stores/https-lectronz-com-stores-x2ha), Saint Germain-en-Laye, France
- **Price:** €37.00 (EUR, before shipping and taxes)
- **Availability:** Sold out
- **Categories:** Equipment, ESP32
- **Product page:** https://www.lectronz.com/products/scd41-2ha-co-measurement-for-home-assistant

## Links

- [Documentation](https://github.com/SteCheFr/SCD41-2HA/blob/main/Documentation/Installation_guide.pdf)

## Images

![SCD41-2HA – CO₂ measurement for Home Assistant](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTczMjYsInB1ciI6ImJsb2JfaWQifX0=--6413aef9c95a20044bb91002297ce4cb727f6dac/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/A.jpg)
![SCD41-2HA – CO₂ measurement for Home Assistant](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTczMzAsInB1ciI6ImJsb2JfaWQifX0=--bec8762218a1b49db8bb18baab932ef76e6203ca/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/B.jpg)
![SCD41-2HA – CO₂ measurement for Home Assistant](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTczMzQsInB1ciI6ImJsb2JfaWQifX0=--6c25e765e66b21e0371bea4ac3475ccf28d8fc64/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/C.jpg)
![SCD41-2HA – CO₂ measurement for Home Assistant](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTczMzgsInB1ciI6ImJsb2JfaWQifX0=--f179804ceaa36863662a90fc5c504bd9604c3814/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/D.jpg)

## Description

Overview

The SCD41-2HA module measures CO₂ (carbon dioxide) is designed for direct integration into Home Assistant using the ESPHome integration.

It is based on the professional-grade Sensirion SCD41 sensor, a high-precision photoacoustic NDIR CO₂ sensor well suited for indoor air quality monitoring.

The SCD41-2HA module comes fully assembled in a compact 56 × 58 × 28 mm enclosure and requires no hardware configuration.

⚙️ Technical Specifications

Sensor: Sensirion SCD41

Technology: Photoacoustic NDIR

CO₂ Measurement Range: 400 to 5000 ppm

CO₂ Accuracy: ±50 ppm – ±2.5% of measured value

Unlike most other CO₂ sensors, this module lets you choose between manual calibration and auto-calibration.
		
Connectivity: Wi-Fi

Integration: Native Home Assistant support via ESPHome integration

Power Supply: 5 V via USB Type-C connector


🏠 Home Assistant Integration

Installation steps:

Plug the module into a 5 V USB-C power supply.

Connect it to your Wi-Fi network.

It will be automatically detected, or you you will need to add it via the ESPHome integration.

The CO₂, humidity, temperature and pressure entities will appear automatically in Home Assistant.

🧰 Typical Use Cases

Indoor air quality monitoring

Automating ventilation or air purifiers based on CO₂ levels

Displaying live air quality data on Home Assistant dashboards


## Shipping policy

All orders are dispatched within 3 business days.
In the rare event of a delay, I will proactively reach out to keep you updated. Your satisfaction and project timeline are my priorities!