How to Connect Downstream Device using x509 Certificates

Question

I am having trouble figuring out how to connect a downstream device to my IoT Central application. There is sample code showing how to do it using symmetric keys, but I am interested in using x509 certificate (https://learn.microsoft.com/en-us/azure/iot-central/core/how-to-connect-iot-edge-transparent-gateway#provision-a-downstream-device). I've tried using the code in the EdgeX509AuthDownstreamDevice sample, but I am not sure what to put for the IOTHUB_HOSTNAME environment variable since IoT Central doesn't expose the IoT Hub. Any advice would be appreciated. Thank you.

Answer 1

@Connor Welcome to Microsoft Q&A forum!
I see you that you have raised the issue on Stack Overflow as well and same has been addressed by Ranga Vadlamudi.

The variables used are misleading. You don't see the IoTHUB connection string. Below, just replace the device shared key and it should work:

export IOTHUB_DEVICE_CONNECTION_STRING="HostName=edgegateway;DeviceId=thermostat1;SharedAccessKey={your device shared key}"  

Hope this will help. Please let us know if you have any further queries.

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