Network Topology Help

Hi Guys

I am in a bit of a slump. we are currently doing a senior seminar project and I am responsible for the network topology. Here is a description below:

The Environmental Management and Protection (EMAP) squadron of Hill AFB has tasked its development team with the implementation of a new sensor testing system for the experimental power hangar. This is the hangar in which experimental power supplies are tested. Humidity, Temperature, and Barometric Pressure readings are critical to the tests. We are going to use Arduino sensors to get the readings, and then the information should be accessible from a website and a mobile app.

Please assist

I currently have the setup as illustrated in the image attached... I was told however alot of the things there are not needed.