如何使用MQTT.fx连接到IOT中心?

时间:2018-12-19 17:04:26

标签: azure-iot-hub azure-iot-central microsoft-iot-central

我正在尝试直接使用MQTT连接到IOT中心。

我只是遵循以下文档,
https://docs.microsoft.com/en-us/azure/iot-central/concepts-connectivity#connect-a-single-device
https://www.instructables.com/id/Azure-IoT-Hub-Set-Up-MQTTfx-Sigfox-Callback-and-Dr/
https://github.com/MediaTek-Labs/aws_mbedtls_mqtt/pull/9/files?short_path=04c6e90
https://docs.azure.cn/zh-cn/articles/azure-operations-guide/iot-hub/aog-iot-hub-howto-connect-with-tool-mqtt-fx(翻译成英文)

在上述文档中,我使用了来自github的dps_cstr工具,通过此链接使用SAS令牌生成了连接字符串。
https://docs.microsoft.com/en-us/azure/iot-central/tutorial-add-device#prepare-the-client-code

经纪人地址= saas-iothub-947867dc-cd5d-446c-90ff-e0f964f020fe.azure-devices.net
代理端口= 8883
客户端ID = 92ff3e25-00e5-4249-9074
用户名= saas-iothub-947867dc-cd5d-446c-90ff.azure-devices.net/92ff3e25-00e5-4249-9074
MQTT版本= 3.1.1
密码= OfAlY0BGstmuinZzOcdDDf

我已经通过使用上面的连接字符串和详细信息配置了带有iot Central的连接配置文件的MQTT.fx。 附上那个 Snap 当我尝试连接到此计算机时,出现错误“未授权连接”。
日志:
2018-12-20 00:42:49,738信息--- BrokerConnectorController:onConnect 2018-12-20 00:42:49,740信息--ScriptsController:清除控制台。 2018-12-20 00:42:49,804信息--- MqttFX ClientModel:已分配ID 92ff3e25-00e5-4249-9074-854b43b5a949的MqttClient。 2018-12-20 00:42:53,571错误--- MqttFX ClientModel:连接时出错 org.eclipse.paho.client.mqttv3.MqttSecurityException:未经授权连接     在org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:28)〜[org.eclipse.paho.client.mqttv3-1.2.0.jar :?]     在org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:988)〜[org.eclipse.paho.client.mqttv3-1.2.0.jar :?]     在org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:145)〜[org.eclipse.paho.client.mqttv3-1.2.0.jar :?]     在java.util.concurrent.Executors $ RunnableAdapter.call(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.FutureTask.run(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.access $ 201(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.run(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.ThreadPoolExecutor.runWorker(未知来源)[?: 1.8.0_181]     在java.util.concurrent.ThreadPoolExecutor $ Worker.run(未知来源)[?: 1.8.0_181]     在java.lang.Thread.run(未知来源)[?: 1.8.0_181] 2018-12-20 00:42:53,572错误--- MqttFX ClientModel:请验证您的设置(例如经纪人地址,经纪人端口和客户ID)和用户凭证! org.eclipse.paho.client.mqttv3.MqttSecurityException:未经授权连接     在org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:28)〜[org.eclipse.paho.client.mqttv3-1.2.0.jar :?]     在org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:988)〜[org.eclipse.paho.client.mqttv3-1.2.0.jar :?]     在org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:145)〜[org.eclipse.paho.client.mqttv3-1.2.0.jar :?]     在java.util.concurrent.Executors $ RunnableAdapter.call(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.FutureTask.run(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.access $ 201(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.run(未知来源)〜[?:1.8.0_181]     在java.util.concurrent.ThreadPoolExecutor.runWorker(未知来源)[?: 1.8.0_181]     在java.util.concurrent.ThreadPoolExecutor $ Worker.run(未知来源)[?: 1.8.0_181]     在java.lang.Thread.run(未知来源)[?: 1.8.0_181] 2018-12-20 00:42:53,574信息--- ScriptsController:清除控制台。 2018-12-20 00:42:53,574错误--- BrokerConnectService:未经授权连接

编辑:
我从https://github.com/Azure/azure-iot-sdk-c/blob/master/certs/certs.c创建了一个CA证书,名为CACert.cer

我在SSL / TLS选项中选择了CS证书文件选项,然后重试。 但是我有同样的错误

1 个答案:

答案 0 :(得分:2)

我刚刚使用连接到Azure IoT中心的MQTT.fx客户端完成了测试。 根据文档Using the MQTT protocol directly,密码必须采用以下格式,请参见示例:

SharedAccessSignature sr={your hub name}.azure-devices.net%2Fdevices%2FMyDevice01%2Fapi-version%3D2016-11-14&sig=vSgHBMUG.....Ntg%3d&se=1456481802

您必须生成上述密码(sas令牌)字符串。您可以使用以下帮助器功能:

string sasToken = SharedAccessSignatureBuilder.GetSASTokenFromConnectionString(connectionString);


public sealed class SharedAccessSignatureBuilder
{ 
    public static string GetHostNameNamespaceFromConnectionString(string connectionString)
    {
        return GetPartsFromConnectionString(connectionString)["HostName"].Split('.').FirstOrDefault();
    }
    public static string GetSASTokenFromConnectionString(string connectionString, uint hours = 24)
    {
        var parts = GetPartsFromConnectionString(connectionString);
        return GetSASToken(parts["HostName"], parts["SharedAccessKey"], parts.Keys.Contains("SharedAccessKeyName") ? parts["SharedAccessKeyName"] : null, hours);
    }
    public static string GetSASToken(string resourceUri, string key, string keyName = null, uint hours = 24)
    {
        var expiry = GetExpiry(hours);
        string stringToSign = System.Web.HttpUtility.UrlEncode(resourceUri) + "\n" + expiry;
        HMACSHA256 hmac = new HMACSHA256(Convert.FromBase64String(key));

        var signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));
        var sasToken = String.Format(CultureInfo.InvariantCulture, "SharedAccessSignature sr={0}&sig={1}&se={2}", HttpUtility.UrlEncode(resourceUri), HttpUtility.UrlEncode(signature), expiry);
        if(!string.IsNullOrEmpty(keyName))
            sasToken += String.Format(CultureInfo.InvariantCulture, "&skn={0}", keyName); 

        return sasToken;
    }

    #region Helpers
    private static Dictionary<string, string> GetPartsFromConnectionString(string connectionString)
    {
        return connectionString.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries).Select(s => s.Split(new[] { '=' }, 2)).ToDictionary(x => x[0].Trim(), x => x[1].Trim());
    }

    // default expiring = 24 hours
    private static string GetExpiry(uint hours = 24)
    {
        TimeSpan sinceEpoch = DateTime.UtcNow - new DateTime(1970, 1, 1);
        return Convert.ToString((int)sinceEpoch.TotalSeconds + 3600 * hours);
    }
    #endregion
}

以下屏幕片段显示了连接到Azure IoT中心和设备仪表板的MQTT.fx设备(myfirstdevice)。

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