Secure TLS session start does NOT connect to IoT Hub

[dsilva-vd]

Hi I'm running the Azure ADU sample on a STM32F4 board (Ethernet)

My connection to my Iot Hub fails during the Secure TLS connect.

In the call to nx_secure_tls_session_start() the function returns 56. I cannot find a definition for that error code. Is there a suggestion on what to look into.

Here is the console output for my program

Nx_SNTP_Client application started.. STM32 IpAddress: XXX.XXX.XXX.XXX SNTP client connected to NTP server : < ca.pool.ntp.org >

SNTP update : Mar 21, 2022 22:55:27.579 UTC

21-03-2022 / 22:55:27 [INFO] Azure IoT Security Module has been enabled, status=0 IoTHub Host Name: my_az_hub.azure-devices.net; Device ID: stm32F429_engg1. Disconnected from IoTHub!: error code = 0x00010005 Failed on nx_azure_iot_pnp_client_connect! [INFO] Azure IoT Security Module has been disabled, status=0

[liydu]

@dsilva-vd, 0x10005 is MQTT connect failure error: https://github.com/azure-rtos/netxduo/blob/1eee883def078a91b8cd19159d1796e3a8862814/addons/mqtt/nxd_mqtt_client.h#L282

There are a couple of things you can check:

• Network connection. Can try with a different Ethernet connection to see if the problem persists. For example, if the network has a proxy, it might cause this problem.
• Check the credentials for the IoT Hub device were correct.