I connected the serial to MQTT GW:
If I have connected Wiznet, I've got "0;0;3;0;9;check wires",
if i disconnected Wiznet then got "Started!"

I have a next problem:
OpenHAB (192.168.1.3) <-> Arduino GW mqtt (192.168.1.234:1883)<-> Arduino TEMP (DHT)

org.eclipse.paho.client.mqttv3.MqttException: ═х єфрхЄё  яюфъы■ўшЄ№ё  ъ ёхЁтхЁє
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNet
workModule.java:75)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(Cli
entComms.java:538)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNet
workModule.java:66)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(Cli
entComms.java:538)
at java.lang.Thread.run(Unknown Source)

with ping everything is ok.
test