env('MQTT_HOST', 'test.mosquitto.org'), 'port' => env('MQTT_PORT', 1883), 'client_id' => env('MQTT_CLIENT_ID', 'LaravelClient'), 'username' => env('MQTT_USERNAME', null), 'password' => env('MQTT_PASSWORD', null), 'clean_session' => env('MQTT_CLEAN_SESSION', true), 'qos' => env('MQTT_QOS', 0), 'retain' => env('MQTT_RETAIN', false), ];