class MQTT::Homie::Node

def publish
  mqtt.batch_publish do
    unless @published
      mqtt.publish("#{topic}/$name", name, retain: true, qos: 1)
      mqtt.publish("#{topic}/$type", @type.to_s, retain: true, qos: 1)
      @published = true
    end
    mqtt.publish("#{topic}/$properties", @properties.keys.join(","), retain: true, qos: 1)
    @properties.each_value(&:publish)
  end
end