text: import voluptuous as vol
  
  import esphomeyaml.config_validation as cv
  from esphomeyaml.components import sensor
  from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_UPDATE_INTERVAL
  from esphomeyaml.helpers import App, Application, variable, setup_component
  
  MakeWiFiSignalSensor = Application.struct('MakeWiFiSignalSensor')
  WiFiSignalSensor = sensor.sensor_ns.class_('WiFiSignalSensor', sensor.PollingSensorComponent)
  
  PLATFORM_SCHEMA = cv.nameable(sensor.SENSOR_PLATFORM_SCHEMA.extend({
      cv.GenerateID(): cv.declare_variable_id(WiFiSignalSensor),
      cv.GenerateID(CONF_MAKE_ID): cv.declare_variable_id(MakeWiFiSignalSensor),
      vol.Optional(CONF_UPDATE_INTERVAL): cv.update_interval,
  }).extend(cv.COMPONENT_SCHEMA.schema))
  
  
  def to_code(config):
      rhs = App.make_wifi_signal_sensor(config[CONF_NAME], config.get(CONF_UPDATE_INTERVAL))
      make = variable(config[CONF_MAKE_ID], rhs)
      wifi = make.Pwifi
  
      sensor.setup_sensor(wifi, make.Pmqtt, config)
      setup_component(wifi, config)
  
  
  BUILD_FLAGS = '-DUSE_WIFI_SIGNAL_SENSOR'
  
  
  def to_hass_config(data, config):
      return sensor.core_to_hass_config(data, config)
  