Create README.md

README.md

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+# ROS_Communication_MQTT_M2M
+
+internet -- use cloud mqtt broker to pub/sub data to ros node
+   remeber change your host ip, userName, pssword (what I use is solace broker)
+
+localRosData -- use local mqtt broker to pub/sub data to ros node
+   remeber change your host ip (The machine that mqtt broker located)
+   linux: ifconfig -> wlan0 - init - 192.168.xx.x
+  
+localTest-- use local mqtt broker to pub/sub data(for test)
+   remeber change your host ip (The machine that mqtt broker located)
+   linux: ifconfig -> wlan0 - init - 192.168.xx.x