Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
795 questions
Connectivity issue after converting the IoT hub to DigiCert.
Navya Sri Bondala
10
Reputation points
Hi,
Recently, we created a new IoT hub and migrated it from Baltimore to DigiCert.
The messages are received from IoT devices to Cloud using Mqtt.
We have followed the procedure for updating certificates in the device too.
The reporting interval is 13min. i.e., the device should report every 13min.
For Ex:
>>For the first D2C messages, the date is successfully published and received after 13min of the device start.
>> The second D2C message is failing to publish from the device side(i.e., checked the logs it is showing mqtt connected but failed to publish the data.
>> This is happening for every alternate reading.
Could you please help me why this is happening? i.e., we are missing a reading every alternate time.
- Below is the picture, in which the first column is generated message time from the device and 3rd column is the inserted time into the IOT hub and 4th is the count of message. As you there is a difference of approx. 30min from one reading to another.
{count} vote
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Sander van de Velde 17,936 Reputation points MVP2023-05-10T05:56:26.33+00:00 Hello @Navya Sri Bondala ,
welcome to this moderated community forum.
It's hard to tell what is going on based on this information.
Which region are you using for the IoT Hub? Which SDK (version) are you using?
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Navya Sri Bondala 10 Reputation points
2023-05-10T10:01:55.1233333+00:00 Hi @Sander van de Velde ,
The region of IoT hub we are using is South India. We are not using Microsoft SDK. So we are only using MQtt protocol to connect to the Azure IoT hub, we are making sure that the ping is maintained for every 2.5min which is within the key alive time. Everything was proper and good but after Digicert update in the devices, we are facing the problem I have mentioned.
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Sander van de Velde 17,936 Reputation points MVP
2023-05-10T20:52:52.5066667+00:00 Hello @Navya Sri Bondala ,
the Digicert certificate is used to force TLS secured communication, even over MQTT.
You need to include the Digicert root certificate in the MQTT communication as explained here.
Which programming language are you using? Can you confirm the Digicert certificate is referenced by your code?
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Navya Sri Bondala 10 Reputation points
2023-05-11T09:52:06.53+00:00 Hello @Sander van de Velde ,
The Digicert root certificate is already included in the code.
We are using Embedded C. Yes, the Digicert certificate is referenced by our code.
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