Azure Sphere
An Azure internet of things security solution including hardware, operating system, and cloud components.
Azure Sphere C2D issue
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 65%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3E9%3C/text%3E%3C/svg%3E)
95504669
546
Reputation points
Hi, I was working on receiving C2D messages on the Azure Sphere device. It was working great from last 7 months. Suddenly i dont receive any c2d message from last 2 days. There has been no code changes. Please let me know how i can fix this as soon as possible. Thank you.
Azure Sphere
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LeelaRajeshSayana-MSFT 17,776 Reputation points Moderator2024-01-25T21:46:03.7866667+00:00 Hi @95504669 Thank you for posting the question here. Can you please check the validity of the certificate used by IoT Hub to authenticate the Azure Sphere device? You can find the list of certificates added to the IoT Hub by navigating to the Certificates tab, found under Security Settings of the IoT Hub, from the Azure portal. Please keep us posted on your findings. If you find the certificates to be valid, please inspect the Azure IoT Hub logs to see if there is any additional information available around the disconnect events.
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95504669 546 Reputation points
2024-01-26T15:07:03.74+00:00 Hi @LeelaRajeshSayana-MSFT . Thank you for your response
The certificate expiry year is 2025. The device also connects to Iot Hub. Data is sent to Hub and device twins are also received by the device. The only issue is that device doesn't receive any C2D message from last 2 to 3 days.
The error for disconnection is as shown in the image. Thank you. -
95504669 546 Reputation points
2024-01-31T03:15:07.9333333+00:00 Hi. Is there something that I can do to fix this issue?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(208, 83%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPS%3C/text%3E%3C/svg%3E)
Padmaja Senapati 150 Reputation points Microsoft External Staff2024-07-17T21:26:52.1266667+00:00 Hello,
Just checking to see if you've been able to resolve this issue or you need further support.
Please let us know.
Thank you for your patience!
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