我正在尝试将MQTT消息发布到iot.eclipse.org:1883 . 我将加热器套件安装到Kura 3.0.0 . 在我的覆盆子pi B（带有raspbian）中，将MqttDataTransport中的'broker-url'设置为Eclipse沙箱代理，并将'connect.auto-on-startup'设置为true .

我看到我的状态在此之后没有改变 . 然后，我显示了Kura.log，我意识到DataPublisherService没有连接 . CloudServices disconnected

o.e.k.d.h.Heater - Getting CloudClient for heater... 2017-07-21 12:15:20,836 [Component Resolve Thread (Bundle 7)] INFO o.e.k.d.h.Heater - Activating Heater... Done. 2017-07-21 12:15:21,034 [Component Resolve Thread (Bundle 7)] INFO o.e.k.c.c.ConfigurationServiceImpl - Registering ConfigurableComponent - org.eclipse.kura.demo.heater.Heater.... 2017-07-21 12:15:21,040 [Component Resolve Thread (Bundle 7)] INFO o.e.k.c.c.ConfigurationServiceImpl - Registering ConfigurableComponent - org.eclipse.kura.demo.heater.Heater....Done 2017-07-21 12:15:22,974 [] INFO o.e.k.d.h.Heater - Published to data message: org.eclipse.kura.message.KuraPayload@248966 2017-07-21 12:15:22,986 [DataServiceImpl:Submit] INFO o.e.k.c.d.DataServiceImpl - DataPublisherService not connected

Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:70)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:650)
... 1 more
MqttDataTransport - xxxxx  Connect failed. Forcing disconnect. xxxxx {}
o.e.k.c.d.t.m.MqttDataTransport - Closing client...
o.e.k.c.d.t.m.MqttDataTransport - Closed

“我该怎么办？提前致谢 .

mqtt kura