NAME

Tinkerforge::BrickletDustDetector - Measures dust density

CONSTANTS

DEVICE_IDENTIFIER

This constant is used to identify a Dust Detector Bricklet.

The get_identity() subroutine and the CALLBACK_ENUMERATE callback of the IP Connection have a device_identifier parameter to specify the Brick's or Bricklet's type.

DEVICE_DISPLAY_NAME

This constant represents the display name of a Dust Detector Bricklet.

CALLBACK_DUST_DENSITY

This constant is used with the register_callback() subroutine to specify the CALLBACK_DUST_DENSITY callback.

CALLBACK_DUST_DENSITY_REACHED

This constant is used with the register_callback() subroutine to specify the CALLBACK_DUST_DENSITY_REACHED callback.

FUNCTION_GET_DUST_DENSITY

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_DUST_DENSITY_CALLBACK_PERIOD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_DUST_DENSITY_CALLBACK_PERIOD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_DUST_DENSITY_CALLBACK_THRESHOLD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_DUST_DENSITY_CALLBACK_THRESHOLD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_DEBOUNCE_PERIOD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_DEBOUNCE_PERIOD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_MOVING_AVERAGE

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_MOVING_AVERAGE

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_IDENTITY

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTIONS

new()

Creates an object with the unique device ID *uid* and adds it to the IP Connection *ipcon*.

get_dust_density()

Returns the dust density in µg/m³.

If you want to get the dust density periodically, it is recommended to use the callback :func:`DustDensity` and set the period with :func:`SetDustDensityCallbackPeriod`.

set_dust_density_callback_period()

Sets the period in ms with which the :func:`DustDensity` callback is triggered periodically. A value of 0 turns the callback off.

:func:`DustDensity` is only triggered if the dust density has changed since the last triggering.

The default value is 0.

get_dust_density_callback_period()

Returns the period as set by :func:`SetDustDensityCallbackPeriod`.

set_dust_density_callback_threshold()

Sets the thresholds for the :func:`DustDensityReached` callback.

The following options are possible:

.. csv-table:: :header: "Option", "Description" :widths: 10, 100

 "'x'",    "Callback is turned off"
 "'o'",    "Callback is triggered when the dust density value is *outside* the min and max values"
 "'i'",    "Callback is triggered when the dust density value is *inside* the min and max values"
 "'<'",    "Callback is triggered when the dust density value is smaller than the min value (max is ignored)"
 "'>'",    "Callback is triggered when the dust density value is greater than the min value (max is ignored)"

The default value is ('x', 0, 0).

get_dust_density_callback_threshold()

Returns the threshold as set by :func:`SetDustDensityCallbackThreshold`.

set_debounce_period()

Sets the period in ms with which the threshold callback

* :func:`DustDensityReached`

is triggered, if the threshold

* :func:`SetDustDensityCallbackThreshold`

keeps being reached.

The default value is 100.

get_debounce_period()

Returns the debounce period as set by :func:`SetDebouncePeriod`.

set_moving_average()

Sets the length of a `moving averaging <https://en.wikipedia.org/wiki/Moving_average>`__ for the dust_density.

Setting the length to 0 will turn the averaging completely off. With less averaging, there is more noise on the data.

The range for the averaging is 0-100.

The default value is 100.

get_moving_average()

Returns the length moving average as set by :func:`SetMovingAverage`.

get_identity()

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c' or 'd'.

The device identifier numbers can be found :ref:`here <device_identifier>`. |device_identifier_constant|