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嗨，我正在尝试使用我刚刚注册的 android 设备连接到 mqtt，但我一直收到错误消息 

Not authorized to connect (5)

这是我的一些代码

        client = new MqttAndroidClient(context, connectionURI, clientID);
        client.setCallback(callbacks);

        String username = IOT_DEVICE_USERNAME;
        char[] password = this.getAuthorizationToken().toCharArray();

        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(true);
        options.setUserName(username);
        options.setPassword(password);

        Log.d(TAG, "Connecting to server: " + connectionURI);
        try {
            // connect
            return client.connect(options, context, listener);
        } catch (MqttException e) {
            Log.e(TAG, "Exception caught while attempting to connect to server", e.getCause());
            throw e;
        }

其中IOT_DEVICE_USERNAME是字符串“use-token-auth” ，connectionUri是“tcp://<"organization">.messaging.internetofthings.ibmcloud.com:8883”

其他有趣的是，就在这个错误之前，我得到了这个日志 

Unregister alarmreceiver to MqttServiced:<"organisation">:<"DeviceType">:<"deviceId">

这是错误的stackTrace

07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err: Not authorized to connect (5)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:28)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:988)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:140)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
07-06 12:27:24.214 9009-9009/wibicom.wibeacon3 W/System.err:     at java.lang.Thread.run(Thread.java:818)
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2 回答 2

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我发现了这个错误：

令牌验证失败（在数据库中找不到设备/网关）：ClientID='d:4rxa4d:AndroidDevice:1c39476b8dd0'

您是否已在 Watson IoT Platform 中为 AndroidDevice 创建了设备类型并将 ID 1c39476b8dd0 注册到您的组织？

本教程展示了如何注册设备。

于 2017-07-06T14:07:59.953 回答
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问题已解决。我确实使用它作为客户端 ID 作为 MqttAndroidClient 对象的构造函数的输入。

String iotClientId = "d:"+ORG+":"+DEVICE_TYPE+":"+DEVICE_ID;

但是，由于我将 Android 设备注册为网关，因为它实际上连接到传感器实际所在的多个外围设备。为了解决这个问题，我将上面的行

String iotClientId = "g:"+ORG+":"+DEVICE_TYPE+":"+DEVICE_ID;
于 2017-07-06T17:16:51.047 回答