Use a Renesas PK-S5D9 development card which you connect to upload temperature - humidity data in AWS IoT Core. The connection was successful and I can visualize the data but now I want to know how to pass this information to an external dashboard or one of Node-Red to see them graphically.
Given that this is a Node-RED forum, you could pass the data to Node-RED using MQTT (via a MQTT broker)
Could you explain how I could do that?
In Node-RED you would use the MQTT-IN node attached to the broker you are using, subscribing to the topics you are interested in.
There is a good introduction to MQTT here https://www.hivemq.com/blog/mqtt-essentials-part-1-introducing-mqtt/
How to publish AWS data to MQTT, is not a Node-RED question but google should be able to help you...