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Specifications / TCP/IP Protocol / API / Bricks and Bricklets / Bricklets / Dust Detector Bricklet

TCP/IP - Dust Detector Bricklet

This is the description of the TCP/IP protocol for the Dust Detector Bricklet. General information and technical specifications for the Dust Detector Bricklet are summarized in its hardware description.

API

A general description of the TCP/IP protocol structure can be found here.

Basic Functions

BrickletDustDetector.get_dust_density
Function ID:
  • 1
Request:
  • empty payload
Response:
  • dust_density – Type: uint16, Unit: 1 µg/m³, Range: [0 to 500]

Returns the dust density.

If you want to get the dust density periodically, it is recommended to use the CALLBACK_DUST_DENSITY callback and set the period with set_dust_density_callback_period.

Advanced Functions

BrickletDustDetector.set_moving_average
Function ID:
  • 10
Request:
  • average – Type: uint8, Range: [0 to 100], Default: 100
Response:
  • no response

Sets the length of a moving averaging 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.

BrickletDustDetector.get_moving_average
Function ID:
  • 11
Request:
  • empty payload
Response:
  • average – Type: uint8, Range: [0 to 100], Default: 100

Returns the length moving average as set by set_moving_average.

BrickletDustDetector.get_identity
Function ID:
  • 255
Request:
  • empty payload
Response:
  • uid – Type: char[8]
  • connected_uid – Type: char[8]
  • position – Type: char, Range: ['a' to 'h', 'z']
  • hardware_version – Type: uint8[3]
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • firmware_version – Type: uint8[3]
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • device_identifier – Type: uint16, Range: [0 to 216 - 1]

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). A Bricklet connected to an Isolator Bricklet is always at position 'z'.

The device identifier numbers can be found here. 

Callback Configuration Functions

BrickletDustDetector.set_dust_density_callback_period
Function ID:
  • 2
Request:
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Response:
  • no response

Sets the period with which the CALLBACK_DUST_DENSITY callback is triggered periodically. A value of 0 turns the callback off.

The CALLBACK_DUST_DENSITY callback is only triggered if the dust density has changed since the last triggering.

BrickletDustDetector.get_dust_density_callback_period
Function ID:
  • 3
Request:
  • empty payload
Response:
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0

Returns the period as set by set_dust_density_callback_period.

BrickletDustDetector.set_dust_density_callback_threshold
Function ID:
  • 4
Request:
  • option – Type: char, Range: See meanings, Default: 'x'
  • min – Type: uint16, Unit: 1 µg/m³, Range: [0 to 216 - 1], Default: 0
  • max – Type: uint16, Unit: 1 µg/m³, Range: [0 to 216 - 1], Default: 0
Response:
  • no response

Sets the thresholds for the CALLBACK_DUST_DENSITY_REACHED callback.

The following options are possible:

Option Description
'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 following meanings are defined for the elements of this function:

For option:

  • 'x' = Off
  • 'o' = Outside
  • 'i' = Inside
  • '<' = Smaller
  • '>' = Greater
BrickletDustDetector.get_dust_density_callback_threshold
Function ID:
  • 5
Request:
  • empty payload
Response:
  • option – Type: char, Range: See meanings, Default: 'x'
  • min – Type: uint16, Unit: 1 µg/m³, Range: [0 to 216 - 1], Default: 0
  • max – Type: uint16, Unit: 1 µg/m³, Range: [0 to 216 - 1], Default: 0

Returns the threshold as set by set_dust_density_callback_threshold.

The following meanings are defined for the elements of this function:

For option:

  • 'x' = Off
  • 'o' = Outside
  • 'i' = Inside
  • '<' = Smaller
  • '>' = Greater
BrickletDustDetector.set_debounce_period
Function ID:
  • 6
Request:
  • debounce – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100
Response:
  • no response

Sets the period with which the threshold callback

is triggered, if the threshold

keeps being reached.

BrickletDustDetector.get_debounce_period
Function ID:
  • 7
Request:
  • empty payload
Response:
  • debounce – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100

Returns the debounce period as set by set_debounce_period.

Callbacks

BrickletDustDetector.CALLBACK_DUST_DENSITY
Function ID:
  • 8
Response:
  • dust_density – Type: uint16, Unit: 1 µg/m³, Range: [0 to 500]

This callback is triggered periodically with the period that is set by set_dust_density_callback_period. The response value is the dust density of the sensor.

Der CALLBACK_DUST_DENSITY callback is only triggered if the dust density value has changed since the last triggering.

BrickletDustDetector.CALLBACK_DUST_DENSITY_REACHED
Function ID:
  • 9
Response:
  • dust_density – Type: uint16, Unit: 1 µg/m³, Range: [0 to 500]

This callback is triggered when the threshold as set by set_dust_density_callback_threshold is reached. The response value is the dust density of the sensor.

If the threshold keeps being reached, the callback is triggered periodically with the period as set by set_debounce_period.