Code and build files for Rabbitcreek's VO2Max Spirometer. Incorporating CO2 enhancements from Ulrich Rissel. Build instructions on Instructable

Source code for Arduino under "VO2Max" - Arduino board settings to use for TTGO T-Display:

Board: ESP32 Dev Module
Upload Speed: 921600
CPU Frequency: 240Mhz (WiFi/BT)
Flash Frequency: 80Mhz
Flash Mode: QIO
Flash Size: 4MB (32Mb)
Partition Scheme: Default 4MB with spiffs (1.2MB APP/1.5 SPIFFS)
Core Debug Level: None`

3D printing files are within the design folder, Ulrich Rissel's design files to use a larger venturi diameter with CO2 sensor holder in design/CO2_upgrade

Additional changes in this version:

• Menu system enhanced with adjustable calibration and setup options.
• Additional GoldenCheetah integration (with VO2 master output)
• CO2 sensor support (Ulrich's mods)