Connecting to IoT Edge using the C SDK on macOS

Andrew Fitzpatrick 1

I am running macOS Catalina 10.15.7 and I am trying to use the downstream sample in the IoT SDK, but I keep getting a SSLHandshake failed error. I used this guide to setup my environment, but I'm not having any luck.

I also spun up an Ubuntu VM, and followed the same guide and I could get the sample to work correctly.

My ultimate goal is to use the SDK in an iOS application, so I first tried using this example app, but I would get the same error.

Is this a bug only related to macOS? Any idea what my next steps should be to get the sample working?

AshokPeddakotla-MSFT 34,616 Reputation points

2020-12-10T07:08:22.183+00:00

@Andrew Fitzpatrick Welcome to Microsoft Q&A Platform! Can you please share the complete error log? it has been mentioned that We've tested the device SDK for C on macOS High Sierra, with XCode version 9.2. so please share the complete error details to look into this issue further.
Andrew Fitzpatrick 1 Reputation point

2020-12-10T14:56:08.297+00:00

I am trying the SDK outside of macOS, plus High Sierra and Xcode 9.2 are super old.

Here is the error that I get:

-> 08:52:58 CONNECT | VER: 4 | KEEPALIVE: 240 | FLAGS: 192 | USERNAME: {redacted}.azure-devices.net/ios/?api-version=2019-10-01&DeviceClientType=iothubclient%2f1.3.9%20(Darwin%3b%20x86_64) | PWD: XXXX | CLEAN: 0
2020-12-10 08:52:59.038 iotedge_downstream_device_sample[49863:161144] CFNetwork SSLHandshake failed (-9807)
Error: Time:Thu Dec 10 08:52:59 2020 File:/Users/{redacted}/workspace/azure-iot-sdk-c/c-utility/pal/ios-osx/tlsio_appleios.c Func:dowork_read Line:447 Communications error while reading
The device client has been disconnected
António Sérgio Azevedo 7,671 Reputation points Microsoft Employee

2021-01-07T13:16:07.947+00:00
Hello @Andrew Fitzpatrick ,
Please share with us if you have any other questions related with your original post. Otherwise could you go ahead and mark the below as answer so community members can benefit from a richer content? :)

Thank you so much.

Remember:

Please accept an answer if correct. Original posters help the community find answers faster by identifying the correct answer. Here is how.

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António Sérgio Azevedo 7,671 Reputation points Microsoft Employee

2020-12-15T12:57:10.35+00:00

@Andrew Fitzpatrick sorry to hear that you are struggling to get your device connected to Azure IoT Edge as a downstream device. You mentioned that you tried this sample with the same error - https://github.com/Azure-Samples/azure-iot-samples-ios - though that sample is to connect directly to IoT Hub.

1) Therefore I am assuming that you have the same error when trying to connect to Azure IoT Edge acting as a transparent gateway as well as when you connect directly to Azure IoT Hub? Please confirm.

I also recommend that you try using the Azure SDK for Embedded C : https://github.com/Azure/azure-sdk-for-c

We are working on that SDK actively and have a walkthrough on how to setup your MAC to run the samples: https://github.com/Azure/azure-sdk-for-c/#mac

Thank you so much for your time so far!
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António Sérgio Azevedo 7,671 Reputation points Microsoft Employee

2020-12-23T11:33:38.197+00:00

Hello @Andrew Fitzpatrick , please share with us if you are still blocked or the suggestion above helped you proceed with your project?

Thank you!
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Connecting to IoT Edge using the C SDK on macOS

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