AWS IoT Core MQTT Connection Timeout Error

I am working on a project that involves connecting an MQTT client to AWS IoT Core. I am using the AWSIoTPythonSDK and paho.mqtt.client libraries in Python. The client is intended to subscribe to two topics and publish the received data to AWS IoT Core.

However, I am encountering a "AWSIoTPythonSDK.exception.AWSIoTExceptions.connectTimeoutException" error after a few seconds of successful operation. The client connects to the MQTT broker (IP: 140.114.89.210, Port: 1883) and subscribes to the topics "wt/generator" and "wt/ws3."

The code successfully connects to the broker and receives data from both topics. However, after a few seconds, it throws the mentioned "connectTimeoutException." I've checked my network settings, security groups, and IAM role permissions, and they seem to be correctly configured. The AWS IoT Core endpoint and credentials are also accurate.

Could someone help me identify the possible reasons for this timeout exception and suggest potential solutions? Are there any additional troubleshooting steps I can take to resolve this issue?

Any guidance or insights would be greatly appreciated. Thank you!

Here's the relevant part of my code:

# [Include code snippet from data_fetcher.py where the MQTT client is initialized and on_connect, on_message functions are defined]

mqttServer = "140.114.89.210"
generator_topic = "wt/generator"
ws3_topic = "wt/ws3"

# AWS IoT Core endpoint (replace with your actual endpoint)
IOT_CORE_ENDPOINT = "xxxxxxxxxxxxxx-ats.iot.us-east-1.amazonaws.com"
# [Other relevant configurations]

client.connect(mqttServer, 1883, 120)
client.loop_forever()