OLED Modification for Divetech Nitrox Analyzer

I really like the simple, compact design of the Nitrox Analyzer by Tony Land. However, it wouldn't work with any OLED displays currently sold on Amazon. The OLED display glass is larger than the cutout. It required too many modifications to the case, and after cracking the first display during assembly, I decided to just modify the opening.  

In addition, I modified Eunjae Im's original code to provide a better UI experience, support building with Visual Studio Code, and the latest Adafruit libraries. It should be much easier to compile out of the box and offer better usability because of the updated UI. The code repository can be found on GitHub: https://github.com/kedube/o2-analyzer

List of materials:

• Arduino Nano

• .96 inch 128x64 OLED screen

• ADS1115 Analog-to-Digital converter

• Rocker switch (13 x 19mm mount)

• Push button (12mm diameter)

• 9MM Electronic Buzzers

• 6 M3x10mm hex head screws

• 4 M2x10mm hex head screws

• Molex terminals

• 9v battery clip connector

• 9v battery

• o2 sensor

• Wire, solder

There are several manufacturers that sell the same display I used for the remix, so you should have plenty of options for sourcing it. 

Added the other STL files here for convenience. The original model can still be found on Thingiverse: https://www.thingiverse.com/thing:4689747  
Here's an archive of the DiveTech blog post: https://web.archive.org/web/20240414033725/https://www.divetech.com/post/the-20-nitrox-analyzer
and Eunjae Im's blog post: https://ejlabs.net/arduino-oled-nitrox-analyzer/