Azure IoT Hub MQTT connect error 5 (unauthorized)

IoT Modules HL78
1

Hi,

I have successfully connected with an MQTT client (MQTTfx) to an Azure IoT Hub with no issues.

However when I try to do the same with my device (HL7800 from Sierra Wireless) I get a connect error 5.

What could be the problem here? I am using MQTT 3.1.1 on both occasions and the same username and clientID.

I created different devices to make sure it’s not something to do with multiple clients on the same device.

thanks

2

Hi,

On MS page, it says that devices communicate with the IoT Hub device endpoints using MQTT with port 8883 and all device communication with IoT Hub must be secured using TLS/SSL

Did you try to config TCP connection with port 8883 on your device? And also please check the supported cipher suite on your device and Azure.

Thanks,

3

Hi Michael, what gateway and mqtt client did you have success with?