MQTT on Azure IOT Hub : Error initializing MQTT connection:Not authorized to connect

Question

I am trying to use Microsoft Azure IOT Hub to demonstrate connecting my device to IOT Hub and send messages using mqtt protocol. I have an account and created device and SAS with TTL as required. I am using java client SDK given by microsoft azure to connect but my connection is not authorized. I have followed all the steps as given in the below URL: https://azure.microsoft.com/en-us/documentation/articles/iot-hub-mqtt-support/ Please help me in this regards. My logs are below:

Logs:

MqttIotHubConnection.open() connectionOptions=
============== Connection options ==============
CleanSession : false
SocketFactory : null
MqttVersion : 4
KeepAliveInterval : 20
ConTimeout : 30
UserName : PCSIOTHub.azure-devices.net/MQ...
SSLProperties : null
WillDestination : null


Exception in thread "main" java.io.IOException: Error initializing MQTT connection:Not authorized to connect
at com.microsoft.azure.iothub.transport.mqtt.MqttIotHubConnection.open(MqttIotHubConnection.java:142)
at com.microsoft.azure.iothub.transport.mqtt.MqttTransport.open(MqttTransport.java:83)
at com.microsoft.azure.iothub.DeviceClient.open(DeviceClient.java:163)
at samples.com.microsoft.azure.iothub.SendReceive.main(SendReceive.java:210)

Dominic Betts Dominic Betts · Accepted Answer · 2016-05-23T05:59:05

If you're using the Microsoft Java client for IoT Hub, you don't need to create the SAS token yourself, the SDK does it for you.

If you follow the example here, https://azure.microsoft.com/en-us/documentation/articles/iot-hub-java-java-getstarted/#create-a-simulated-device-app, all you need to do is replace:

private static IotHubClientProtocol protocol = IotHubClientProtocol.AMQPS;

with:

private static IotHubClientProtocol protocol = IotHubClientProtocol.MQTT;

and you will have a basic Java client that can communicate with IoT Hub over MQTT.

MQTT on Azure IOT Hub : Error initializing MQTT connection:Not authorized to connect

2 Answers