Get Started for INMP441, MAX98357a and FastLED

Set the device_type to 7 in the settings.ini
Configure pins on /devices/Inmp441Max98357aFastLed.hpp
Flash the esp32 using usb to uart converter
First flash, set "upload" as method under the OTA section in the settings.ini. After that you can set it to "ota" as well
Build and flash the project with PlatformIO, for example run pio run --target upload from the commandline

More info