{ "brokerAddr": "server.addr", "brokerPort": 8883, "defaultQos": 2, "defaultRetain": false, "devicePrefix": "MyClient", "tlsMode": 1, "tlsCaCrtFile": "/path/to/ca.crt", "tlsClCrtFile": "/path/to/client.crt", "tlsClKeyFile": "/path/to/client.key", "tlsPsk": "1234567890abcdef", "lastWillTopic": "LAST_WILL_CONNECT", "lastWillMessage": "X", "lastWillQos": 2, "lastWillRetain": true, "lastWillOnExit": true, "lastWillOnExitMsg": "E", "connectTopic": "LAST_WILL_CONNECT", "connectMessage": "C", "connectQos": 2, "connectRetain": true, "maxKeepAlive": 10, "topicPrefix": "client1" }