Package: pyaranet4
pyaranet4 - Interface with your Aranet4 CO₂ meter via PythonThis is a cross-platform interface for theAranet4CO₂ 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 withBleak, a cross-platform Python Bluetooth client. It is also heavily
inspired byAranet4-Python, an excellent library that is unfortunately only
compatible with Linux.Works on MacOS, Linux and WindowsCommand-line tool and Python libraryLightweight: instantiate class, read class properties, doneInstallationpip install pyaranet4UsageBefore 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 toolpyaranet4 comes with a command-line utility, which is mostly compatible with Aranet4-Python's:C:\> pyaranet4
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Connected: Aranet4 06CDC | v0.4.4
Updated 56 s ago. Intervals: 60 s
2167 total readings
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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.csvOr view the full list of command-line arguments and parameters:C:\> pyaranet4 --helpAs a libraryYou can also use pyaranet4 as a library:frompyaranet4importAranet4a4=Aranet4()print("Battery level:%s%%"%a4.battery_level)print("Current CO₂ level:%ippm"%a4.current_readings.co2)print("Stored CO2 values:")print(a4.history.co2)TheAranet4object has the following public properties and methods:current_readings(namespace): The current readings of the device's sensors, as a namespace with propertiesco2(
integer),temperature(float)pressure(float),humidity(integer),battery_level(integer)
,update_interval(integer), andsince_last_update(integer)current_readings_simple(namespace):  Identical tocurrent_readings, but without theupdate_intervalandsince_last_updateproperties; may be faster to requesthistory(namespace):  Historical readings stored on the device, as a namespace with propertiesco2,temperature,pressure,humidity,sensors, andtimestamps. The sensor values are dictionaries with the interval index as
keys and the sensor reading as values.sensorsis a tuple of sensors included in the result.timestampsis a
dictionary with indexes as keys and corresponding UNIX timestamps as values. The latter can be used to determine what
the timestamp of a given value is.mac_address(string): The MAC address of the Bluetooth devicebattery_level(integer): Battery level, 0-100.manufacturer_name(string): The manufacturer of the device, e.g.SAF Tehnikamodel_name(string): The name of the device model, e.g.Aranet4device_name(string):  The name of the device, e.g.Aranet4 06CDChardware_revision(integer): Hardware revision number, e.g.9software_revision(string): Software (firmware) version, e.g.v0.4.4update_interval(integer): Amount of seconds between sensor updatessince_last_update(integer): Amount of seconds since last sensor updatestored_readings_amount(integer): Amount of sensor readings stored on the deviceget_history(sensors: tuple, start: int, end: int)(namespace): Same return type ashistory, but allows one to
limit results to a given tuple of sensors and a given range of indexes, which can be faster to receive than the full
history. Sensors should be a tuple of a combination ofAranet4.SENSOR_CO2,Aranet4.SENSOR_HUMIDITY, and so on.