268 lines
9.7 KiB
ReStructuredText
268 lines
9.7 KiB
ReStructuredText
DFRobot mmWave Radar
|
|
====================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up DFRobot mmWave Radar
|
|
:image: dfrobot_sen0395.jpg
|
|
:keywords: mmWave
|
|
|
|
The `DFRobot mmWave Radar <https://wiki.dfrobot.com/mmWave_Radar_Human_Presence_Detection_SKU_SEN0395>`__
|
|
(aka ``SEN0395``) is a 24GHz radar which can be used for human presence detection. It can detect tiny movements
|
|
and compared to a PIR sensor **it can detect presence continuously**. This can be useful, for example, to turn
|
|
the lights on when you enter a room, keep them on as long as you are there (without waving your hands at the
|
|
sensor) and turn them off almost immediately after you leave the room.
|
|
|
|
It is possible to use this sensor with only a single GPIO pin; however, if you wish to change its settings,
|
|
a :doc:`/components/uart` component (and its requisite GPIO pins) is required in your device's configuration.
|
|
|
|
.. figure:: images/dfrobot_sen0395-full.jpg
|
|
:align: center
|
|
:width: 75%
|
|
|
|
DFRobot mmWave Radar / presence detection sensor
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
dfrobot_sen0395:
|
|
|
|
binary_sensor:
|
|
# Information coming from uart bus
|
|
- platform: dfrobot_sen0395
|
|
name: Mmwave Detected via UART
|
|
|
|
# Information coming from dedicated gpio (IO2)
|
|
- platform: gpio
|
|
name: Mmwave Detected via GPIO
|
|
device_class: motion
|
|
pin:
|
|
number: GPIOXX
|
|
mode: INPUT_PULLDOWN
|
|
|
|
switch:
|
|
# Switch to turn on/off detection
|
|
- platform: dfrobot_sen0395
|
|
name: Mmwave Active
|
|
|
|
.. _dfrobot_sen0395-component:
|
|
|
|
Hub Component
|
|
-------------
|
|
|
|
You only need to have the hub component (``dfrobot_sen0395:`` entry) defined if you want to change the sensor's
|
|
settings or read its state via the UART. A :doc:`/components/binary_sensor/gpio` alone is sufficient if you only want
|
|
to determine presence/occupancy. When you define ``dfrobot_sen0395:`` you'll need to have a ``uart:`` entry in
|
|
your configuration with both the TX and RX pins defined and the baud rate must be set to ``115200``.
|
|
|
|
Multiple instances of this component may be defined if multiple :doc:`/components/uart` components are available:
|
|
|
|
.. code-block:: yaml
|
|
|
|
dfrobot_sen0395:
|
|
- id: mmWave_1
|
|
uart_id: uart_1
|
|
- id: mmWave_2
|
|
uart_id: uart_2
|
|
...
|
|
|
|
Configuration variables:
|
|
************************
|
|
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation. Necessary if you want
|
|
to define multiple instances of this component.
|
|
- **uart_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :doc:`/components/uart` if you want
|
|
to use multiple UART buses.
|
|
|
|
.. _dfrobot_sen0395-binary_sensor:
|
|
|
|
Binary Sensor
|
|
-------------
|
|
|
|
.. _dfrobot_sen0395-via_gpio:
|
|
|
|
Via GPIO
|
|
********
|
|
|
|
To determine presence, you can simply use a :doc:`/components/binary_sensor/gpio` and connect a single GPIO pin
|
|
from your processor to the IO2 pin of the mmWave radar. Using a dedicated GPIO pin may offer an advantage since
|
|
it may wake the processor from sleep.
|
|
|
|
If you don't want/need to change the radar's settings and only need to determine presence/occupancy, the
|
|
``dfrobot_sen0395:`` and ``uart:`` components are not necessary.
|
|
|
|
.. code-block:: yaml
|
|
|
|
binary_sensor:
|
|
- platform: gpio
|
|
name: Presence Detected via GPIO
|
|
device_class: motion
|
|
pin:
|
|
number: GPIOXX
|
|
mode: INPUT_PULLDOWN
|
|
|
|
.. _dfrobot_sen0395-via_uart:
|
|
|
|
Via UART
|
|
********
|
|
|
|
Connecting the sensor via the serial connection (UART) allows both changing its settings as well as reading its state.
|
|
Note, however, that the UART peripheral cannot wake the processor; if you plan on sleeping the processor, you'll likely
|
|
still need to use the :ref:`GPIO pin <dfrobot_sen0395-via_gpio>` approach described above (in addition to the UART).
|
|
|
|
First, setup a :doc:`/components/uart` and :ref:`dfrobot_sen0395-component` and then use its binary sensor platform
|
|
to create individual binary sensors for each presence sensor.
|
|
|
|
.. code-block:: yaml
|
|
|
|
binary_sensor:
|
|
- platform: dfrobot_sen0395
|
|
name: Presence Detected via UART
|
|
|
|
Configuration variables:
|
|
************************
|
|
|
|
- **dfrobot_sen0395_id** (*Optional*, :ref:`config-id`): The ID of the DFRobot mmWave component defined above.
|
|
Required when multiple instances of the ``dfrobot_sen0395`` component are defined.
|
|
- All other options from :ref:`Binary Sensor <config-binary_sensor>`.
|
|
|
|
.. _dfrobot_sen0395-switch:
|
|
|
|
Switch
|
|
------
|
|
|
|
:ref:`Switch components <config-switch>` are used to enable/disable various module features/functions.
|
|
|
|
.. code-block:: yaml
|
|
|
|
switch:
|
|
- platform: dfrobot_sen0395
|
|
dfrobot_sen0395_id: mmWave
|
|
type: sensor_active
|
|
name: mmWave Active
|
|
|
|
Configuration variables:
|
|
************************
|
|
|
|
- **dfrobot_sen0395_id** (*Optional*, :ref:`config-id`): The ID of the DFRobot mmWave component defined above.
|
|
Required when multiple instances of the ``dfrobot_sen0395`` component are defined.
|
|
- **type** (**Required**): One of:
|
|
|
|
- ``presence_via_uart``: when enabled, the module sends presence information via both the serial connection and
|
|
GPIO pin; when disabled, presense is indicated only via the GPIO pin.
|
|
- ``sensor_active``: when enabled, presence detection is reported; when disabled, presense will not be reported.
|
|
- ``start_after_boot``: when enabled, the sensor will start immediately after power-on; when disabled, the sensor
|
|
must be manually started.
|
|
- ``turn_on_led``: when enabled, the mmWave sensor's LED blinks during operation; when disabled, the LED will always
|
|
remain off.
|
|
|
|
- All other options from :ref:`Switch <config-switch>`.
|
|
|
|
.. _dfrobot_sen0395-actions:
|
|
|
|
Actions
|
|
-------
|
|
|
|
.. _dfrobot_sen0395-action_settings:
|
|
|
|
``dfrobot_sen0395.settings`` Action
|
|
***********************************
|
|
|
|
.. warning::
|
|
|
|
Each change to the configuration of the mmWave radar triggers a write to its internal flash/EEPROM.
|
|
Write cycles to this memory are limited, so avoid the practice of changing settings frequently.
|
|
Determine the appropriate settings for your device and avoid changing them unless absolutely necessary.
|
|
|
|
The DFRobot mmWave Radar has several settings which can be changed. These settings are saved in non-volatile memory
|
|
and do not need to be set on each boot.
|
|
|
|
The settings action allows changing of any number of the mmWave radar's internal parameters/settings. With this
|
|
action, any unspecified parameters will remain unchanged. All settings are tempatable.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
- dfrobot_sen0395.settings:
|
|
factory_reset: true
|
|
detection_segments:
|
|
# Define between one and four segments
|
|
- [0cm, 3m]
|
|
- [5.1m, 6.6m]
|
|
output_latency:
|
|
delay_after_detect: 0s
|
|
delay_after_disappear: 0s
|
|
sensitivity: 7
|
|
|
|
|
|
Configuration variables:
|
|
````````````````````````
|
|
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID of the mmWave sensor on which settings should be
|
|
changed. If only one radar is defined, this is optional.
|
|
- **factory_reset** (*Optional*, boolean): If set to true, a factory reset of the sensor will be performed (before
|
|
changing other options if present). Ignored if not set or set to ``false``.
|
|
- **detection_segments** (*Optional*, list): A list of detection segments. A segment specifies from where to where
|
|
detection should trigger. One to four segments and ranges from 0cm to 9m may be specified. Distances should be
|
|
defined in steps of 15cm. Note that the specified ranges are rounded internally. Segments can be defined in a
|
|
one or two dimensional list. Pairs of values must be defined (from distance to distance). The default is one
|
|
range from 0cm to 3m.
|
|
|
|
**Examples**
|
|
|
|
.. code-block:: yaml
|
|
|
|
detection_segments:
|
|
- [0cm, 3m]
|
|
- [5.1m, 6.6m]
|
|
|
|
|
|
In the above example, if a person was present in the range between 0cm and 3m (distance from the sensor) or
|
|
between 5.1m and 6.6m the sensor would trigger (meaning a person was detected). If a person is present
|
|
between 3.1m and 5m or 6.7m and 9m it would not trigger.
|
|
|
|
.. code-block:: yaml
|
|
|
|
detection_segments:
|
|
- !lambda |-
|
|
return 0;
|
|
- !lambda |-
|
|
return return id(mwave_max_distance).state;
|
|
|
|
Section values can be defined using lambdas, so you can set the distances depending on other entities. Distances
|
|
are defined as a float in meters (10cm = 0.1). If you return a negative value (-1) the segment will not be set.
|
|
|
|
- **output_latency** (*Optional*, dictionary):
|
|
|
|
- **delay_after_detect** (**Required**, :ref:`config-time`): Time to wait before signaling that a person was
|
|
detected. Specify in steps of 25 ms. Factory default is 2.5s. Value is tempatable: Return seconds value
|
|
(100 ms = 0.1). Returning -1 keeps the value unchanged.
|
|
- **delay_after_disappear** (**Required**, :ref:`config-time`): Time to wait before signaling that a person
|
|
is no longer detected. Specify in steps of 25 ms. Factory default is 10 s. Value is tempatable: Return seconds
|
|
value (100 ms = 0.1). Returning -1 keeps the value unchanged.
|
|
|
|
- **sensitivity** (*Optional*, int): Set the sensitivity of the sensor. Ranges from 0 to 9. Value is tempatable:
|
|
Return 0-9. Returning -1 keeps the value unchanged.
|
|
|
|
``dfrobot_sen0395.reset`` Action
|
|
********************************
|
|
|
|
Restart the sensor.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
dfrobot_sen0395.reset:
|
|
|
|
Configuration variables:
|
|
````````````````````````
|
|
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID of the mmWave component. Useful when multiple instances of this component are defined.
|
|
|
|
See Also
|
|
--------
|
|
- :ref:`UART bus <uart>`
|
|
- :ref:`Binary Sensor <config-binary_sensor>`
|
|
- :ref:`config-id`
|
|
- `DFRobot mmWave Radar Wiki page <https://wiki.dfrobot.com/mmWave_Radar_Human_Presence_Detection_SKU_SEN0395>`__
|
|
- :ghedit:`Edit`
|