mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-11-18 11:15:36 +01:00
380 lines
12 KiB
ReStructuredText
380 lines
12 KiB
ReStructuredText
PN7150 NFC
|
|
==========
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up PN7150 NFC tag readers and tags in ESPHome
|
|
:image: pn7150.jpg
|
|
:keywords: PN7150, NFC, RFID
|
|
|
|
.. _pn7150-component:
|
|
|
|
Component/Hub
|
|
-------------
|
|
|
|
The ``pn7150`` component allows you to use PN7150 NFC controllers with ESPHome. This component is a global hub that
|
|
establishes a connection to the PN7150 via :ref:`I²C <i2c>`.
|
|
|
|
.. figure:: images/pn7150-full.jpg
|
|
:align: center
|
|
:width: 70.0%
|
|
|
|
An :ref:`I²C <i2c>` bus must be defined within your device's ESPHome configuration to use the PN7150.
|
|
|
|
ESPHome supports both card/tag reading/writing as well as card/tag emulation with this component. By default,
|
|
only read/write mode is enabled; card/tag emulation is enabled only if the ``emulation_message`` configuration
|
|
variable is defined (see below). Regardless, reader/writer (polling) mode and card/tag emulation mode may be
|
|
independently enabled and disabled by using the corresponding :ref:`pn7150-actions` (see below).
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
dwl_req_pin: 17
|
|
irq_pin: 35
|
|
ven_pin: 16
|
|
wkup_req_pin: 21
|
|
emulation_message: https://www.home-assistant.io/tag/pulse_ce
|
|
tag_ttl: 1000ms
|
|
|
|
Configuration variables:
|
|
************************
|
|
|
|
- **dwl_req_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The pin connected to the PN7150's
|
|
``DWL_REQ`` line. Used to invoke the PN7150's firmware update mode; may be used in a future release.
|
|
- **irq_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The pin connected to the PN7150's ``IRQ`` line.
|
|
- **ven_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The pin connected to the PN7150's ``VEN`` line.
|
|
- **wkup_req_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The pin connected to the PN7150's
|
|
``WKUP_REQ`` line. May be used to improve power management in a future release.
|
|
- **emulation_message** (*Optional*, string): When scanned by another NFC card/tag reader (such as a smartphone), this
|
|
string is used as the content for an NDEF-formatted response. This allows the PN7150 to act as a tag in addition to a
|
|
tag reader/writer.
|
|
- **tag_ttl** (*Optional*, :ref:`config-time`): The duration that must elapse after the PN7150 is no longer able to
|
|
"see" a tag before it is considered to have been removed from the reader.
|
|
- **on_tag** (*Optional*, :ref:`Automation <automation>`): An automation to perform when a tag is first read. See
|
|
:ref:`pn7150-on_tag`.
|
|
- **on_tag_removed** (*Optional*, :ref:`Automation <automation>`): An automation to perform after a tag is removed. See
|
|
:ref:`pn7150-on_tag_removed`.
|
|
- **on_emulated_tag_scan** (*Optional*, :ref:`Automation <automation>`): An automation to perform when the PN7150 is
|
|
scanned by another tag reader (such as a smartphone). See :ref:`pn7150-on_emulated_tag_scan`.
|
|
- **i2c_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`I²C Component <i2c>` if you need
|
|
to use multiple I²C buses.
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID for this component.
|
|
|
|
|
|
.. _pn7150-actions:
|
|
|
|
Actions
|
|
-------
|
|
|
|
.. _pn7150-set_clean_mode:
|
|
|
|
``tag.set_clean_mode`` Action
|
|
*****************************
|
|
|
|
Use this action to invoke "clean mode" -- the next tag presented to the PN7150 will be "cleaned", removing all data
|
|
from the tag.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.set_clean_mode: my_pn7150_id
|
|
|
|
.. _pn7150-set_format_mode:
|
|
|
|
``tag.set_format_mode`` Action
|
|
******************************
|
|
|
|
Use this action to invoke "format mode" -- the next tag presented to the PN7150 will be "formatted", leaving only an
|
|
empty NDEF message structure on the tag.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.set_format_mode: my_pn7150_id
|
|
|
|
.. _pn7150-set_read_mode:
|
|
|
|
``tag.set_read_mode`` Action
|
|
****************************
|
|
|
|
Use this action to invoke "read mode" -- the next tag presented to the PN7150 will be read. This is the default mode
|
|
that the component operates in.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.set_read_mode: my_pn7150_id
|
|
|
|
.. _pn7150-set_write_message:
|
|
|
|
``tag.set_write_message`` Action
|
|
********************************
|
|
|
|
Use this action to set the NDEF message used for "write mode" (see below).
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.set_write_message:
|
|
message: https://www.home-assistant.io/tag/pulse
|
|
include_android_app_record: false
|
|
|
|
- **message** (**Required**, string, templatable): The string to include in the tag's first NDEF record; typically
|
|
a URL as shown.
|
|
- **include_android_app_record** (*Optional*, boolean): Include a second NDEF record required for some Android
|
|
operating systems. Defaults to ``true``.
|
|
|
|
.. _pn7150-set_write_mode:
|
|
|
|
``tag.set_write_mode`` Action
|
|
*****************************
|
|
|
|
Use this action to invoke "write mode" -- the next tag presented to the PN7150 will have its NDEF message set to the
|
|
message defined by the ``tag.set_write_message`` action (see above). **Note that a message must be set before this mode
|
|
may be invoked.**
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.set_write_mode: my_pn7150_id
|
|
|
|
.. _pn7150-set_emulation_message:
|
|
|
|
``tag.set_emulation_message`` Action
|
|
************************************
|
|
|
|
Use this action to set the NDEF message used for card (tag) emulation mode, when enabled (see below).
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.set_emulation_message:
|
|
message: https://www.home-assistant.io/tag/pulse
|
|
include_android_app_record: false
|
|
|
|
- **message** (**Required**, string, templatable): The string to include in the (emulated) tag's first NDEF record;
|
|
typically a URL as shown.
|
|
- **include_android_app_record** (*Optional*, boolean): Include a second NDEF record required for some Android
|
|
operating systems. Defaults to ``true``.
|
|
|
|
.. _pn7150-emulation_off:
|
|
|
|
``tag.emulation_off`` Action
|
|
****************************
|
|
|
|
Use this action to disable card (tag) emulation mode. The PN7150 will no longer respond to requests from other readers,
|
|
such as smartphones.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.emulation_off: my_pn7150_id
|
|
|
|
.. _pn7150-emulation_on:
|
|
|
|
``tag.emulation_on`` Action
|
|
***************************
|
|
|
|
Use this action to enable card (tag) emulation mode. The PN7150 will respond to requests from other readers, such as
|
|
smartphones.
|
|
|
|
**Note:** when card/tag emulation is enabled, polling (detecting a nearby card/tag) frequency is decreased; this
|
|
typically results in slightly slower detection of cards/tags presented to the PN7150. This behavior is normal and should
|
|
be expected; it is the result of the PN7150 toggling between polling and listening modes to support both functions.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.emulation_on: my_pn7150_id
|
|
|
|
.. _pn7150-polling_off:
|
|
|
|
``tag.polling_off`` Action
|
|
****************************
|
|
|
|
Use this action to disable card (tag) reading/writing. The PN7150 will no longer read or write cards/tags.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.polling_off: my_pn7150_id
|
|
|
|
.. _pn7150-polling_on:
|
|
|
|
``tag.polling_on`` Action
|
|
***************************
|
|
|
|
Use this action to enable card (tag) reading/writing. The PN7150 will read or write cards/tags.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...:
|
|
then:
|
|
- tag.polling_on: my_pn7150_id
|
|
|
|
Triggers
|
|
--------
|
|
|
|
.. _pn7150-on_tag:
|
|
|
|
``on_tag`` Trigger
|
|
******************
|
|
|
|
This automation will be triggered immediately after the PN7150 module identifies a tag and reads its NDEF
|
|
message (if one is present).
|
|
|
|
The parameter ``x`` this trigger provides is of type ``std::string`` and is the tag UID in the format
|
|
``74-10-37-94``. The example configuration below will publish the tag ID on the MQTT topic ``pn7150/tag``.
|
|
|
|
See :ref:`pn7150-ndef_reading` below for how to use the second ``tag`` parameter that is provided to this trigger.
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
# ...
|
|
on_tag:
|
|
then:
|
|
- mqtt.publish:
|
|
topic: pn7150/tag
|
|
payload: !lambda 'return x;'
|
|
|
|
A tag scanned event can also be sent to the Home Assistant tag component
|
|
using :ref:`api-homeassistant_tag_scanned_action`.
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
# ...
|
|
on_tag:
|
|
then:
|
|
- homeassistant.tag_scanned: !lambda 'return x;'
|
|
|
|
You could also send the value to Home Assistant via a :doc:`template sensor </components/sensor/template>`:
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
# ...
|
|
on_tag:
|
|
then:
|
|
- text_sensor.template.publish:
|
|
id: nfc_tag
|
|
state: !lambda 'return x;'
|
|
|
|
text_sensor:
|
|
- platform: template
|
|
name: "NFC Tag"
|
|
id: nfc_tag
|
|
|
|
.. _pn7150-on_tag_removed:
|
|
|
|
``on_tag_removed`` Trigger
|
|
**************************
|
|
|
|
This automation will be triggered after the ``tag_ttl`` interval (see above) when the PN7150 no longer "sees" a
|
|
previously scanned tag.
|
|
|
|
The parameter ``x`` this trigger provides is of type ``std::string`` and is the removed tag UID in the format
|
|
``74-10-37-94``. The example configuration below will publish the removed tag ID on the MQTT topic ``pn7150/tag_removed``.
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
# ...
|
|
on_tag_removed:
|
|
then:
|
|
- mqtt.publish:
|
|
topic: pn7150/tag_removed
|
|
payload: !lambda 'return x;'
|
|
|
|
.. _pn7150-on_emulated_tag_scan:
|
|
|
|
``on_emulated_tag_scan`` Trigger
|
|
********************************
|
|
|
|
If card/tag emulation is enabled, this automation will be triggered when another reader (such as a smartphone) scans
|
|
the PN7150 and reads the NDEF message it responds with. No parameters are available to this action because data is only
|
|
sent *from* the PN7150 *to* the scanning device.
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
# ...
|
|
on_emulated_tag_scan:
|
|
then:
|
|
- rtttl.play: "alert:d=32,o=5,b=160:e6,p,e6,p,e6"
|
|
|
|
.. _pn7150-ndef:
|
|
|
|
NDEF
|
|
====
|
|
|
|
The PN7150 supports reading NDEF messages from and writing NDEF messages to cards/tags.
|
|
|
|
.. _pn7150-ndef_reading:
|
|
|
|
NDEF Reading
|
|
------------
|
|
|
|
Given an NFC tag formatted and written using the Home Assistant Companion App, the following example will send the tag
|
|
ID contained within its NDEF message to Home Assistant using the :ref:`api-homeassistant_tag_scanned_action`.
|
|
If no NDEF record is found with a tag ID, the tag's UID will be sent to Home Assistant, instead.
|
|
|
|
The ``tag`` variable is available to any actions that run within the ``on_tag`` and ``on_tag_removed`` triggers.
|
|
|
|
.. code-block:: yaml
|
|
|
|
pn7150_i2c:
|
|
# ...
|
|
on_tag:
|
|
then:
|
|
- homeassistant.tag_scanned: !lambda "return tag.has_ha_tag_id() ? tag.get_ha_tag_id() : x;"
|
|
|
|
.. _pn7150-ndef_writing:
|
|
|
|
NDEF Writing
|
|
------------
|
|
|
|
The examples below illustrate how NDEF messages may be written to cards/tags via the PN7150. Note that a
|
|
:doc:`button </components/button/index>` is a great mechanism to use to trigger these actions.
|
|
|
|
The first example will write a simple, fixed NDEF message to a tag.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...
|
|
then:
|
|
- tag.set_write_message:
|
|
message: https://www.home-assistant.io/tag/pulse
|
|
include_android_app_record: false # optional
|
|
- tag.set_write_mode: my_pn7150_id
|
|
|
|
The next example can be used to write a (pseudo) random UUID to a tag in the same manner as the Home Assistant
|
|
Companion App.
|
|
|
|
.. code-block:: yaml
|
|
|
|
on_...
|
|
then:
|
|
- tag.set_write_message:
|
|
message: !lambda "return nfc::get_random_ha_tag_ndef();"
|
|
- tag.set_write_mode: my_pn7150_id
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :doc:`index`
|
|
- :doc:`pn532`
|
|
- :doc:`rc522`
|
|
- :doc:`rdm6300`
|
|
- :apiref:`pn7150/pn7150.h`
|
|
- :ghedit:`Edit`
|