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.

If you want to get the dust density periodically, it is recommended to use the :cb:`Dust Density` callback and set the period with :func:`Set Dust Density Callback Period`.

set_dust_density_callback_period()

Sets the period with which the :cb:`Dust Density` callback is triggered periodically. A value of 0 turns the callback off.

The :cb:`Dust Density` callback is only triggered if the dust density has changed since the last triggering.

get_dust_density_callback_period()

Returns the period as set by :func:`Set Dust Density Callback Period`.

set_dust_density_callback_threshold()

Sets the thresholds for the :cb:`Dust Density Reached` 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)"

get_dust_density_callback_threshold()

Returns the threshold as set by :func:`Set Dust Density Callback Threshold`.

set_debounce_period()

Sets the period with which the threshold callback

* :cb:`Dust Density Reached`

is triggered, if the threshold

* :func:`Set Dust Density Callback Threshold`

keeps being reached.

get_debounce_period()

Returns the debounce period as set by :func:`Set Debounce Period`.

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.

get_moving_average()

Returns the length moving average as set by :func:`Set Moving Average`.

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', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). The Raspberry Pi HAT (Zero) Brick is always at position 'i' and the Bricklet connected to an :ref:`Isolator Bricklet <isolator_bricklet>` is always as position 'z'.

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