Comments (6)
ewertons
commented on June 15, 2024
Hi Nicolo,
Which sample from the repo after you running?
…________________________________
From: Nicolò Danzi<mailto:[email protected]>
Sent: 4/19/2017 6:52 AM
To: Azure/azure-umqtt-c<mailto:[email protected]>
Cc: Subscribed<mailto:[email protected]>
Subject: [Azure/azure-umqtt-c] Connect to IoTHub (#8)
Hi all,
I am not able to publish a message to IoTHub, I get a MQTT_CLIENT_ON_CONNACK and then a 'MQTT_CLIENT_CONNECTION_ERROR'. Maybe this is due to some parameter put in a wrong way. With the same parameters I am able to publish a message with another mqtt c client (Paho).
Could you please provide and example of how to connect and publish a message to IoTHub?
Thanks
Nicolo`
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ndanzi
commented on June 15, 2024
I am running this sample:
https://github.com/Azure/azure-umqtt-c/blob/master/samples/mqtt_client_sample/mqtt_client_sample.c
Another question: Is there any way to manage the trustStore certificate in order to validate SSL connection to the server?
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tameraw
commented on June 15, 2024
@ndanzi - Have you considered using our IoT Hub client SDK (which uses this very library)? Any reasons not to use that?
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ndanzi
commented on June 15, 2024
@tameraw - thank you for reply, but that SDK doesn't accomplish the requirements of my project, in fact I must support connections to several MQTT brokers, not only IoT Hub.
With this library I am able to connect to all those brokers (apollo, mosquitto, ecc) and the only broker I cannot send messages to is IoT Hub.
The umqtt client connects to the IoT Hub but when I try to send a message to the broker, I get the OnErrorComplete callback called. My credentials are right, because with them I can connect with Paho Mqtt c library. As password I use a SAS token generated by token service.
I am also able to send messages to IoT Hub using your uamqp library.
I suppose I should change the disposition of my authentication parameters, but I cannot find any example of connection to IoT Hub using umqtt.
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tameraw
commented on June 15, 2024
@ndanzi - Here is the detailed doc on MQTT support for IoTHub:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-mqtt-support
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juanmartin
commented on June 15, 2024
Hi, I'm in a similar path. I need to get messages from mosquitto broker and send them to IoT Hub through a downstream device, so I'm trying to merge the iotedge_downstream_device_sample with the mqtt_client_sample.
I'm trying to understand the functions involved for this process, but cannot find any information. @ndanzi Were you able to accomplish this task?
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Related Issues (15)
- Fails to publish message to IoTHub HOT 3
- Get connection error while publishing HOT 1
- ESP32-Mqtt was not connected using Azure SSL Certificate HOT 1
- Random connection failure to IoTHub HOT 4
- ping response timeout quesiton HOT 3
- Error on xio_close HOT 4
- error: unknown type name ‘QOS_VALUE’ HOT 6
- mqtt client does not handle ping response in the right way HOT 3
- Publisher and Subscriber in the same client HOT 1
- Compile error
- compiliation problems when mqtt_client .h included by a cpp file HOT 2
- UMQTT or Azure IoT SDK C? HOT 3
- mqtt_client_sample.c program client program exits after receiving one or two messages, HOT 2
- Relationship between this library and Azure Iot SDK MQTT code? HOT 1
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