CompletedClaratech AQM9
PROClaratech AQM9
License
：GPL 3.0
Description
Video link：
Check out the product in action here: https://www.youtube.com/@claratech_innovations
Project introduction
A comprehensive air quality monitor that tracks CO2, particulate matter, VOCs, NOx, temperature, humidity, and atmospheric pressure. Built on ESP32 hardware with TASMOTA firmware, featuring an OLED display, RGB LED indicators, and audible pollution alerts.
For more details information checkout the product website: https://caqm.io
Project function
- Real-time monitoring of multiple air quality parameters
- Visual LED indicators with color-coded pollution levels
- OLED display with multiple viewing modes
- Audible alerts for high pollution events
- WiFi connectivity with web interface
- Automatic temperature compensation
- CO2 sensor calibration support
- Configurable auto-restart for long-term stability
Project Parameters
Sensors
| Sensor | Measurements |
|---|---|
| MHZ19B | CO2 (ppm) |
| PMS5003 | PM1, PM2.5, PM10 (µg/m³) |
| SGP41 | VOC Index, NOx Index |
| BME280 | Temperature, Humidity, Atmospheric Pressure |
LED Indicators
Three RGB LEDs provide at-a-glance air quality status:
| LED | Sensor |
|---|---|
| LED 1 | CO2 |
| LED 2 | PM2.5 |
| LED 3 | VOC/NOx (shows worst of the two) |
LED Colors:
- Green - Good air quality
- Orange - Moderate levels
- Red - High pollution
- Violet - Very high pollution
Pollution Thresholds
| Pollutant | Normal | Moderate | High |
|---|---|---|---|
| CO2 (ppm) | ≤800 | ≤1200 | ≤2000 |
| PM2.5 (µg/m³) | ≤5 | ≤20 | ≤50 |
| VOC Index | ≤100 | ≤200 | ≤350 |
| NOx Index | ≤1 | ≤20 | ≤200 |
PCB Design Features
- The PCB design is compact with major components on the top side.
- There are two PCBs, the main board and the sensor PCB.
- The Mainboard houses all major components on the top side including the ESP32 module and power components.
- The PM and CO2 sensors are connected at the bottom side.
- The sensor PCB consists of the TVOC and temp/humidity/pressure sensors.
Development
This project uses Berry scripting language on the TASMOTA firmware platform.
Key References
THhe driver code is open sourced and avaible here: https://github.com/Devops-Claratech/CAQM9
Design Drawing
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Intellectual Property Statement & Reproduction Instructions
This is an open-source hardware project. All intellectual property rights belong to the creator. The project is shared on the platform for learning, communication, and research only; any commercial use is prohibited. If your intellectual property rights are infringed on EasyEDA, please notify us by submitting relevant materials in accordance with the Rules for Complaints and Appeals of IPR Infringement.
Users must independently verify the circuit design and suitability when replicating this project. All risks and consequences are borne by the user, and the platform assumes no liability.
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