REPLACE DFPlayer - A Mini MP3 Player For Arduino 1.0.5
https://github.com/DFRobot/DFRobotDFPlayerMini
Processor (old bootloader in settings)
adafruit neopixel 1.10.7
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Install https://github.com/hideakitai/MPU9250
For the library above, need to change values in MPU9250.h: Windows Location: C:\Users\USER NAME\Documents\Arduino\libraries\MPU9250\MPU9250.h
static constexpr uint8_t AK8963_WHOAMI_DEFAULT_VALUE{0x00}; // Originally 0x48 static constexpr uint8_t MPU9250_WHOAMI_DEFAULT_VALUE{0x75}; // Originally 0x71