First I looked at using RFIDs, but was advised against using that sensor as it can be difficult to work with due to security settings. I ended up using the Hall Effect US5881 and a magnet and started research how to set it up on a breadboard. It was small and really easy to work with.
Next I set up my sensor as input in D2 and my LED as OUTPUT in D0. I used 1,000 ohm resistors for both the Hall Effect and the LED. To make sure my circuit was working, I blinked my LED.
I wrote the following pseudocode to help plan my code and then looked online for sample content. I only had to make minor adjustments to get the code to perform the way I wanted.
//Hall effect sensor detects a magnet
//Turns on LED light
//Sends a text message to roommate "Hey roomie, I'm home!"
//Manually able to switch the light off
Is this a good/useful/informative piece of content to include in the project? Have your say!