National Association of Realtors’ CRT Labs in Chicago has developed a Raspberry Pi HAT to make information about the air people are breathing more accessible:

The PiAQ

Open Source Indoor Air Quality Sensor for the Raspberry Pi

Measurement Points:

• Temperature (SHT31)
• Relative Humidity (SHT31)
• VOC (Volatile Organic Compounds) (IAQ Core)
• Derived CO2 (IAQ Core)
• Barometric Pressure (MPL3115A2)
• Light Intensity (TSL2561)
• CO Concentration (MiCS-4154)
• NO2 Concentration (MiCS-4154)
• Sound Intensity (ADMP401)

Connectivity:

• FSK (RFM69HW 433/915MHz)
• WiFi (Particle Photon)
• Cellular (Particle Electron) (Coming soon)
• LoRa (Coming Soon)

Authors and Contributors

• Akram Ali (@AKstudios)
• David Conroy (@dconroy)
• Christopher Coté (@entone)

Schematics and Eagle CAD Files are on GitHub:

NationalAssociationOfRealtors/PiAQ

CRTLabs has shared the board on OSH Park:

PiAQ HAT