[General] Unable to establish MQTT Connection in greengrass discovery demo

[pegasus-automation]

greengrass_discovery demo unable to make MQTT connection.

I am trying to run greengrass connectivity demo. With the components as shown in the attached image below. But while running the demo it is unable to make MQTT Connection.

System information

• Hardware board: ESP32 Wrover
• IDE used: IDF v4.2
• Operating System: [ Windows ]
• Project/Demo: greengrass connectivity

References

The image has all the components active in my core device.

Below is the error printed while running the demo code

14 1733 [iot_thread] [aws_greengrass_discovery_demo.c:543] [INFO] [Greengrass_Discovery_Demo] Greengrass device discovered.

15 1733 [iot_thread] [aws_greengrass_discovery_demo.c:435] [INFO] [Greengrass_Discovery_Demo] Creating a TLS connection to 192.168.0.109:8883.

E (18206) PKCS11: failed nvs get file size 4354 0
16 2266 [iot_thread] [core_mqtt.c:1568] [ERROR] [MQTT] CONNACK recv failed with status = MQTTNoDataAvailable.

17 2266 [iot_thread] [core_mqtt.c:1839] [ERROR] [MQTT] MQTT connection failed with status = MQTTNoDataAvailable.

18 2266 [iot_thread] [aws_greengrass_discovery_demo.c:457] [ERROR] [Greengrass_Discovery_Demo] Failed to establish MQTT connection: Server=192.168.0.109

19 2269 [iot_thread] [aws_greengrass_discovery_demo.c:435] [INFO] [Greengrass_Discovery_Demo] Creating a TLS connection to 192.168.0.109:8883.

E (23506) PKCS11: failed nvs get file size 4354 0
20 2795 [iot_thread] [core_mqtt.c:1568] [ERROR] [MQTT] CONNACK recv failed with status = MQTTNoDataAvailable.

21 2795 [iot_thread] [core_mqtt.c:1839] [ERROR] [MQTT] MQTT connection failed with status = MQTTNoDataAvailable.

22 2795 [iot_thread] [aws_greengrass_discovery_demo.c:457] [ERROR] [Greengrass_Discovery_Demo] Failed to establish MQTT connection: Server=192.168.0.109

23 2817 [iot_thread] [aws_greengrass_discovery_demo.c:435] [INFO] [Greengrass_Discovery_Demo] Creating a TLS connection to 192.168.0.109:8883.

E (28926) PKCS11: failed nvs get file size 4354 0
24 3330 [iot_thread] [core_mqtt.c:1568] [ERROR] [MQTT] CONNACK recv failed with status = MQTTNoDataAvailable.

25 3330 [iot_thread] [core_mqtt.c:1839] [ERROR] [MQTT] MQTT connection failed with status = MQTTNoDataAvailable.

26 3330 [iot_thread] [aws_greengrass_discovery_demo.c:457] [ERROR] [Greengrass_Discovery_Demo] Failed to establish MQTT connection: Server=192.168.0.109

27 3335 [iot_thread] [aws_greengrass_discovery_demo.c:435] [INFO] [Greengrass_Discovery_Demo] Creating a TLS connection to 192.168.0.109:8883.

E (34156) PKCS11: failed nvs get file size 4354 0
28 3852 [iot_thread] [core_mqtt.c:1568] [ERROR] [MQTT] CONNACK recv failed with status = MQTTNoDataAvailable.

29 3852 [iot_thread] [core_mqtt.c:1839] [ERROR] [MQTT] MQTT connection failed with status = MQTTNoDataAvailable.

30 3852 [iot_thread] [aws_greengrass_discovery_demo.c:457] [ERROR] [Greengrass_Discovery_Demo] Failed to establish MQTT connection: Server=192.168.0.109

31 4113 [iot_thread] [aws_greengrass_discovery_demo.c:435] [INFO] [Greengrass_Discovery_Demo] Creating a TLS connection to 192.168.0.109:8883.

E (41936) PKCS11: failed nvs get file size 4354 0
32 4632 [iot_thread] [core_mqtt.c:1568] [ERROR] [MQTT] CONNACK recv failed with status = MQTTNoDataAvailable.

33 4632 [iot_thread] [core_mqtt.c:1839] [ERROR] [MQTT] MQTT connection failed with status = MQTTNoDataAvailable.

[muneebahmed10]

Hi @pegasus-automation,

It looks like the core is discovered but the MQTT connection is unable to be established. Have you configured your device with sufficient permissions, as described here? You might be missing a statement like

{
      "Effect": "Allow",
      "Action": [
        "greengrass:*"
      ],
      "Resource": "*"
}

for Greengrass or a similar one for IoT in your device's policy

[pegasus-automation]

Yes this permission is given in the policy @muneebahmed10

[n9wxu]

Can you review this document and make sure the "Client device auth" component is configured? https://docs.aws.amazon.com/greengrass/v2/developerguide/client-devices-tutorial.html#enable-client-device-support

[pegasus-automation]

@n9wxu as you can see in the image attached the "client device auth" is running.

[jbutler]

@pegasus-automation you still need to configure the component. Simply deploying it is not enough. I'd suggest going through the tutorial. It's very likely you're missing something that will be outlined there.

[aggarg]

Are you still facing this issue?

[pvyawaha]

Hello @pegasus-automation , I am closing this issue now, please reopen on the same topic or create a new one for other.