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arduino-ideesp32jwtgoogle-cloud-iot

I need a fix for "LWMQTT_CONNECTION_DENIED" and "LWMQTT_NOT_AUTHORIZED"

I am using this

https://github.com/GoogleCloudPlatform/google-cloud-iot-arduino/tree/master/examples/Esp32-lwmqtt [Github link]

to configure the default ESP32 built-in LED using Google Cloud IoT Core's 'Update config' feature from the Console. But when I populated all the 3 files with necessary data and ran I am getting the following error in Serial Monitor of Arduino. The irony is, when I changed the project details from a new mail-id, everything is working fine. Can someone please help me in finding, why some projects are not working with this code

Below is an image of my problem for your reference

Link to my error in image format

Solution

  • This happens whenever you have a parameter configured incorrectly in the MQTT connection properties. I recommend you print your Client ID string and verify the JWT payloads match what the MQTT bridge expects.

    The client ID should be in the following format:

    projects/<PROJECT_ID>/locations/<REGION>/registries/<REGISTRY_ID>/devices/<DEVICE_ID>

    Verify that everything configured in the client header matches what is configured in the Google Cloud Console.

    For the device JWT, you can verify it from jwt.io and should ensure the aud and alg payloads are what is expected for AuthN.

    A few other conditions that can cause disconnections:

    • Connecting to the wrong topic (e.g. wrong device ID)
    • Connecting using the wrong QoS

    These should not affect you as you're working from the Arduino client though.