sequenceDiagram participant User participant Arduino participant LCD participant Keypad participant DFPlayer participant Buzzer participant LED alt system rect rgb(191, 223, 255) User->>Keypad: Press ...

Using a DFPlayer mini purchased on Amazon - Lacking functionality, could not get it to read file counts in the folder and it would just return -1. In folders numbered 01 – 99. File names with 3 digit ...