text: import voluptuous as vol
  
  from esphome import automation, pins
  from esphome.components import binary_sensor, spi
  from esphome.components.spi import SPIComponent
  import esphome.config_validation as cv
  from esphome.const import CONF_CS_PIN, CONF_ID, CONF_ON_TAG, CONF_SPI_ID, CONF_TRIGGER_ID, \
      CONF_UPDATE_INTERVAL
  from esphome.cpp_generator import Pvariable, get_variable
  from esphome.cpp_helpers import gpio_output_pin_expression, setup_component
  from esphome.cpp_types import App, PollingComponent, Trigger, std_string
  
  DEPENDENCIES = ['spi']
  MULTI_CONF = True
  
  PN532Component = binary_sensor.binary_sensor_ns.class_('PN532Component', PollingComponent,
                                                         spi.SPIDevice)
  PN532Trigger = binary_sensor.binary_sensor_ns.class_('PN532Trigger', Trigger.template(std_string))
  
  CONFIG_SCHEMA = cv.Schema({
      cv.GenerateID(): cv.declare_variable_id(PN532Component),
      cv.GenerateID(CONF_SPI_ID): cv.use_variable_id(SPIComponent),
      vol.Required(CONF_CS_PIN): pins.gpio_output_pin_schema,
      vol.Optional(CONF_UPDATE_INTERVAL): cv.update_interval,
      vol.Optional(CONF_ON_TAG): automation.validate_automation({
          cv.GenerateID(CONF_TRIGGER_ID): cv.declare_variable_id(PN532Trigger),
      }),
  }).extend(cv.COMPONENT_SCHEMA.schema)
  
  
  def to_code(config):
      for spi_ in get_variable(config[CONF_SPI_ID]):
          yield
      for cs in gpio_output_pin_expression(config[CONF_CS_PIN]):
          yield
      rhs = App.make_pn532_component(spi_, cs, config.get(CONF_UPDATE_INTERVAL))
      pn532 = Pvariable(config[CONF_ID], rhs)
  
      for conf_ in config.get(CONF_ON_TAG, []):
          trigger = Pvariable(conf_[CONF_TRIGGER_ID], pn532.make_trigger())
          automation.build_automations(trigger, [(std_string, 'x')], conf_)
  
      setup_component(pn532, config)
  
  
  BUILD_FLAGS = '-DUSE_PN532'
  