esphome-docs/components/binary_sensor/pn532.rst

PN532 NFC/RFID Tag
==================

.. seo::
    :description: Instructions for setting up NFC tags for the PN532 integration.
    :image: pn532.jpg

The ``pn532`` binary sensor platform lets you track if an NFC/RFID tag with a given
unique id (``uid``) is currently being detected by the PN532 or not.

.. figure:: images/pn532-full.jpg
    :align: center
    :width: 60.0%

See :doc:`/components/pn532` for instructions for setting up the connection to the PN532.

.. code-block:: yaml

    # Example configuration entry
    spi:
      clk_pin: D0
      miso_pin: D1
      mosi_pin: D2

    pn532:
      cs_pin: D3
      update_interval: 1s

    binary_sensor:
      - platform: pn532
        uid: 74-10-37-94
        name: "PN532 NFC Tag"

Configuration variables:
------------------------

- **uid** (**Required**, string): The unique ID of the NFC/RFID tag. This is a hyphen-separated list
  of hexadecimal values. For example ``74-10-37-94``.
- **name** (**Required**, string): The name of the binary sensor.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
- All other options from :ref:`Binary Sensor <config-binary_sensor>` and :ref:`MQTT Component <config-mqtt-component>`.

.. _pn532-setting_up_tags:

Setting Up Tags
---------------

To set up binary sensors for specific NFC tags you first have to know their unique IDs. To obtain this
id, first set up a simple pn532 configuration without any binary sensors like above.

When your code is running and you approach the PN532 with an NFC Tag, you should see a message like this:

.. code::

    Found new tag '74-10-37-94'

Then copy this id and create a ``binary_sensor`` entry as in the configuration example. Repeat this process for
each tag.

See Also
--------

- :doc:`/components/pn532`
- :doc:`index`
- :apiref:`binary_sensor/pn532_component.h`
- :ghedit:`Edit`

.. disqus::