pyaranet4 1.0.0b0

A cross-platform Python interface for the Aranet4 CO₂ meter

pyaranet4 - Interface with your Aranet4 COâ‚‚ meter via Python

This is a cross-platform interface for the Aranet4 COâ‚‚ meter. You can use it to read values from the meter to then store in a database, display on a website, or generally do with whatever you want. Since the official mobile app for the device does not have automatic export features and the manual export is prone to failure, you can use this library instead for such purposes.

It is built with Bleak, a cross-platform Python Bluetooth client. It is also heavily inspired by Aranet4-Python, an excellent library that is unfortunately only compatible with Linux.

• Works on MacOS, Linux and Windows
• Command-line tool and Python library
• Lightweight: instantiate class, read class properties, done

Installation

pip install pyaranet4

Usage

Before you do anything, make sure the device is properly paired. Once it is paired, pyaranet4 will usually be able to figure out the rest (e.g. the MAC address) by itself. Note that Bluetooth LE is a slow protocol, and most commands and calls will take a couple of seconds to complete. This is not an issue with the library, but a limitation of the technology.

As a command-line tool

pyaranet4 comes with a command-line utility, which is mostly compatible with Aranet4-Python's:

C:\> pyaranet4
--------------------------------------
Connected: Aranet4 06CDC | v0.4.4
Updated 56 s ago. Intervals: 60 s
2167 total readings
--------------------------------------
CO2:         511 ppm
Temperature: 25.05 C
Humidity:    58 %
Pressure:    1014.50 hPa
Battery:     98 %
--------------------------------------

Get stored historical values from the device:

C:\> pyaranet4 --history
index,timestamp,temperature,humidity,pressure,co2
1,2021-09-09 22:12:20,25.1,56,1014.5,584
2,2021-09-09 22:13:20,25.1,56,1014.5,590
3,2021-09-09 22:14:20,25.1,56,1014.5,579
...

Or save them to a file:

C:\> pyaranet4 --history --output-file=readings.csv

Or view the full list of command-line arguments and parameters:

C:\> pyaranet4 --help

As a library

You can also use pyaranet4 as a library:

from pyaranet4 import Aranet4

a4 = Aranet4()
print("Battery level: %s%%" % a4.battery_level)
print("Current COâ‚‚ level: %i ppm" % a4.current_readings.co2)
print("Stored CO2 values:")
print(a4.history.co2)

You can find the full API documentation here.