So here is what I’ve done so far.
-Independently tested all hardware. Buttons, Arduino, MP3 SD card reader, RFID reader and speaker.
-Software compiles on Uno with no issues
-Pin out appears correct, I am using this but on an Uno TonUINO_Schaltplan.pdf (649,4 KB)
-Serial Monitor will spout gibberish when the buttons are pressed, but it does change
(potential issue here. I am using clean my drive but I have a feeling there are still hidden files based on size)
Files on card are
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TonUINO Version 2.1
created by Thorsten Voß and licensed under GNU/GPL.
Information and contribution at https://tonuino.de.
Maximal Volume: 25
Minimal Volume: 5
Initial Volume: 15
Sleep Timer: 0
Inverted Volume Buttons: 1
Admin Menu locked: 0
Admin Menu Pin: 1111
Firmware Version: 0x92 = v2.0
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