5) Creating a Retrival Lambda to connect to MongoDb on EC2and use API Gateway to make graph

In this video a lambda code is written in nodejs to retrive data from mongodb and expose it as a API in API Gateway which can be visualized as a graph using d3.js

SourceCode : https://github.com/GodsonRockstar/Building-Realtime-Data-Processing-IoT-Applications-Using-AWS