Like earlier users, I have not been able to get the phone app to work. My experience follows closely that described by @Clemens. I am using the BME688 shuttle board with the Adafruit HUZZAH ESP32 board purchased separately. I am able to collect data and train the algorithm but gas detection does not work. I am including pictures showing what the app does when configuration files are copied to it. This apparently a long-standing problem and should be fixed asap. Very disappointing.
... View more