Vỏ Case ESP32 - Máy đo CO2 dùng SCD41 (Tương thích Home Assistant)

Description:

Build your own high-precision indoor air quality monitor! This project uses the industry-standard Sensirion SCD41 sensor paired with an ESP32 to track CO2 levels, temperature, and humidity. It is fully integrated with Home Assistant via ESPHome for real-time monitoring and automation.

Key Features:

• High Precision: Powered by the SCD41 NDIR sensor (factory calibrated).

• Home Assistant Native: Seamless integration via ESPHome (local control, no cloud required).

• Customizable: Easily add automated notifications (e.g., "Time to open a window!") or custom dashboards.

• Compact: Designed to be small, efficient, and easy to assemble.

How it works: The ESP32 communicates with the SCD41 sensor via the I2C protocol. ESPHome handles the data processing and sends the metrics directly to your Home Assistant instance over Wi-Fi.

Components Needed (Bill of Materials):

To build this project, you will need the following parts:

1. Microcontroller:

   • ESP32 DevKit V1 (or any standard ESP32 development board).

2. Sensor:

   • Sensirion SCD41 CO2 sensor module (often sold as a breakout board with I2C pins).

3. Wiring & Connection:

   • Jumper wires (Female-to-Female or Female-to-Male, depending on your board/sensor headers).

   • Breadboard (optional, for prototyping) or soldering equipment for a permanent build.

4. Power:

   • Micro-USB cable (for powering the ESP32).

5. Assembly (3D Printed Parts):

6. Insert your 3D printed case details here (e.g., "PLA filament, no supports needed, etc.")

   Wiring Guide (I2C):

   ESP32 Pin

   SCD41 Pin

   3.3V

   VCC

   GND

   GND

   GPIO 21

   SDA

   GPIO 22

   SCL

Software / Setup:

1. Install ESPHome in your Home Assistant.

2. Create a new device and choose "ESP32".

3. Use the following configuration code in your YAML file:

# Basic configuration snippet for SCD41

YAML CODE:

i2c:

sda: 21

scl: 22

sensor:

- platform: scd4x

co2:

name: "CO2 Level"

temperature:

name: "Temperature"

humidity:

name: "Humidity"

update_interval: 60s

• Install the firmware (via USB for the first time, then OTA wirelessly).

• Add the device to Home Assistant, and you are ready to go!