pimatic-mqtt not connecting to broker

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Hello,

i try to setup MQTT for my Pimatic.
But pimatic-mqtt is throwing messagings every seconds:

[pimatic-mqtt] info: Reconnecting to MQTT Broker mqtt

But it never connects

Two other nodes (ESPEasy on ESP8266 and mqttspy) can connect successful to my MQTT broker (mosquitto running on pimaticPi).

pi@raspberrypi:/var/log/mosquitto $ tail -f mosquitto.log
1485243098: New client connected from 192.168.0.230 as ESPClient0 (c1, k15).
1485243104: New connection from 192.168.0.230 on port 1883.
1485243104: Client ESPClient0 already connected, closing old connection.
1485243104: New client connected from 192.168.0.230 as ESPClient0 (c1, k15).
1485244237: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1485245576: New connection from 192.168.0.10 on port 1883.
1485245576: New client connected from 192.168.0.10 as Marcel_091242395 (c1, k60).
1485246038: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1485246177: mosquitto version 1.3.4 terminating
1485246177: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.

Any Ideas?

please show you config

I used the default config.

    {
      "plugin": "mqtt",
      "active": true,
      "brokers": [
        {
          "brokerId": "default"
        }
      ]
    }

Now i changed to

    {
      "plugin": "mqtt",
      "active": true,
      "brokers": [
        {
          "brokerId": "default",
          "host": "192.168.0.11",
          "port": 1883,
          "reconnect": 500000,
          "username": "user",
          "password": "password"
        }
      ]
    }

and i works now, even with no user/pass configured on mosquitto

For the default config it is necessary to have MQTT broker on localhost and have anonymous access enabled.