Greenhouse

The Greenhouse class provides direct access to the sensors (temperature, humidity, soil moisture and light), and the ability to log sensor values to a database and export the database to CSV.

The Greenhouse class should be imported from the module:

from rpi_greenhouse import Greenhouse

Then an instance of a Greenhouse object should be created, e.g:

greenhouse = Greenhouse()

The initialisation takes optional argument db_path which defaults to /home/pi/.greenhouse/greenhouse.db - the location the SQLite database file is stored. Users with another username or otherwise wishing to save the database elsewhere should specify the full path here.

e.g:

indicator = Greenhouse('/root/greenhouse/greenhouse.db')

Properties

greenhouse.temperature

Calculated property - get the temperature value from the temperature sensor in degrees Celsius.

greenhouse.humidity

Calculated property - get the humidity value from the humidity sensor in percentage (higher value means more humid).

greenhouse.soil

Calculated property - get the soil moisture value from the soil moisture sensor in percentage (0% is totally dry, 100% is totally wet).

greenhouse.light

Calculated property - get the light level value from the light sensor in percentage (0% is total darkness, 100% is bright light).

Note: Use greenhouse.darkness_level to calibrate your light sensor.

greenhouse.darkness_level

Default: 0.01

Set the darkness level to improve the accuracy of your light sensor.

Methods

The following methods are available:

greenhouse.record_sensor_values()

Take all sensor readings and record to the database.

Arguments: None

greenhouse.export_to_csv()

Export sensor data from database and save as CSV file.

Arguments:

• file_path (default: '/home/pi/greenhouse.csv')