IAQ Board is a DIY device for measuring internal air quality running with esphome. It's quite small and is based on a custom PCB where part of the components are soldered and connected.
Here is what it can measure:
-**Temperature / Humidity / Pressure**
-**Air particles PM1, PM2.5, PM10**
-**Carbon Dioxide with NDIR sensor**
-**Air Quality Index by EPA, based on 24h average PM2.5 particles**
-**Ambient light**
-**Total VOC (volatile organic compound)**
-**equivalent CO2 (not very correct compared with the NDIR sensor, but it's provided by the VOC sensor)**
On top of that:
-**At least one OLED display to show the data (can have one more on the top of the MCU board)**
-**three RGB wide angle LEDs with auto brightness. LED1 indicates PM2.5, LED2 - Air quality index, LED3 - CO2.**
-**auto night dimming of the displays and LEDs (can be disabled)**
-**MIN/MAX values of Temperature, PM2.5 and CO2, and 24h average PM2.5 value.**
-**multi function button for selection of the data to show on the display**
ESPHome Configuration
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Full documentation (PCB, Schematic, esphome yaml config) is published here: `https://github.com/nkitanov/iaq_board <https://github.com/nkitanov/iaq_board>`__
YAML configuration is about 700 lines and can be downloaded from here: `iaq_board.yaml <https://github.com/nkitanov/iaq_board/blob/master/firmware/iaq_board.yaml>`__
