What does HackerNews think of Aranet4-Python?

We use these at office in conference rooms or 1:1 rooms, and encourage people to keep CO2 levels below 700-800 (an empty room 450-550). Very high quality, a half dozen all agree perfectly on all sensors. They support API.

# SAF Aranet4 Home

Wireless Indoor Air Quality Monitor for Home, Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History

- The perfect companion for indoor environments, allowing you to monitor CO2 levels, temperature, relative humidity, and atmospheric pressure in real-time

- Easy for anyone to use – the color coding and the optional buzzer warns you when the CO2 concentration gets too high

- Power-efficient e-ink display ensures super long battery life for this wireless device (up to 4 years)

- Smartphone app for viewing and analyzing historical data up to 14 days history (supports iPhone and iPad with iOS 12 or later, Android devices with Oreo 8.0 or later, compatible with Bluetooth 4.1 or later)

- Uses nondispersive infrared sensor (NDIR) technology for most precise and reliable CO2 measurements

https://smile.amazon.com/gp/product/B07YY7BH2W/

https://github.com/Anrijs/Aranet4-Python *

* Note: Smart Home Integrations must be enabled in Aranet4 mobile app for full support

Several of us have built visualization tools which produce output a bit similar to the one in this article for the aranet4 unit. These can be found linked from: https://observablehq.com/@thadk/aranet4-explorer. Works best with the iPad app on an M1/M2 macOS computer.

There are also several other ways to get the output such as a bleak project on GitHub (https://github.com/Anrijs/Aranet4-Python).