The Definitive DIY Air Quality Station: AirGuardian Vision Pro

You asked for the ultimate data-gathering tool, and we delivered. Now, take the next step. Go beyond just collecting data and bring your environment's health into full view with the AirGuardian Vision Pro.

This is the definitive DIY air quality station, built upon the powerful foundation of our C3 Pro kit and enhanced with a vibrant, full-color LCD screen. No more checking your phone or computer to know your air quality; the most critical information is now displayed beautifully, right where you need it. The Vision Pro transforms your environmental data into an immediate, actionable, at-a-glance dashboard for your home or office.

Why the AirGuardian Vision Pro is the Definitive Choice:

At-a-Glance Visual Dashboard: The brilliant 1.8" color TFT display is your window into the air you breathe. Our pre-configured firmware cycles through two clear, dynamic screens, showing you everything from temperature and CO2 to particulate matter and VOC levels in real-time.
Comprehensive 7-in-1 Sensing: The core of the Vision Pro features the same suite of professional-grade sensors, measuring: Carbon Dioxide (CO2), Volatile Organic Compounds (VOCs), NOx Index, Particulate Matter (PM1.0, PM2.5, & PM10.0), Formaldehyde (CH2O), Temperature, Humidity, and Barometric Pressure.
Powerful & Proven ESP32 Core: At its heart is the legendary ESP32 D1 Mini Pro, a powerhouse microcontroller known for its stability, performance, and vast community support, ensuring your station runs flawlessly.
Seamless Smart Home Integration: Built on the powerful ESPHome platform, this monitor integrates flawlessly with Home Assistant. Not a Home Assistant user? No problem! With built-in MQTT support, you can send data to any platform, dashboard, or database you choose.
Fully Open & Customizable: You get the complete ESPHome configuration file, including all the display logic. Change the fonts, redesign the layout, add more pages—make it uniquely yours. This is DIY at its best.

Technical Specifications & Connections

The AirGuardian Vision Pro is engineered for those who want immediate feedback without sacrificing technical depth or flexibility.

Core Components

Microcontroller: ESP32 D1 Mini Pro (Wi-Fi & Bluetooth LE)
Display: 1.8" TFT LCD Display (ST7735S Controller, 128x160 Resolution)
Power: 5V DC input via standard pins.
Voltage Regulation: On-board AMS1117 regulator provides a clean 3.3V supply to the controller and sensors.

On-board Sensors

SCD40: True NDIR sensor for accurate Carbon Dioxide (CO2), Temperature, and Humidity.
SGP41: Measures Volatile Organic Compounds (VOC Index) and Nitrogen Oxides (NOx Index).
AHT20 + BMP280 Combo: A secondary sensor providing Temperature, Humidity, and precise Barometric Pressure.
PMS5003: Laser-based sensor for Particulate Matter (PM1.0, PM2.5, PM10.0).
ZE08-CH2O: Electrochemical sensor for Formaldehyde (CH2O) concentration.

Connectivity & Pinout

The board is pre-wired to connect all components to the ESP32 D1 Mini Pro.

SPI Display Bus:

SCK (Clock): Connected to ESP32 Pin 18
SDA (MOSI): Connected to ESP32 Pin 23
CS (Chip Select): Connected to ESP32 Pin 32
A0 (DC): Connected to ESP32 Pin 27
RES (Reset): Connected to ESP32 Pin 26

I2C Bus (SCD40, SGP41, AHT20/BMP280):

SCL (Clock): Connected to ESP32 Pin 22
SDA (Data): Connected to ESP32 Pin 21

UART1 (PMS5003 Particle Sensor):

ESP32 TX (Pin 13): Connects to PMS5003 RX
ESP32 RX (Pin 5): Connects to PMS5003 TX

UART2 (ZE08-CH2O Formaldehyde Sensor):

ESP32 TX (Pin 16): Connects to ZE08-CH2O RX
ESP32 RX (Pin 17): Connects to ZE08-CH2O TX

Firmware

The device is designed to be flashed with ESPHome. We provide a complete, ready-to-use yaml configuration file that includes the two-page cycling display. The firmware enables a local web server for advanced data viewing and publishes all sensor readings to MQTT for maximum compatibility.