- MicroSD Card Adapter
- MISO: 50
- MOSI: 51
- SCK: 52
- CS: 4
- Keypad
- Pins 22-29
- Libraries
- SD (library for SD-card reader)
- Adafruit SSD1306 (library for OLED display)
- Keypad (library for 4x4 membrane keypad)
- Inspiration
- Funduino (SD-card reader pin configuration)
- Fix file io
- File is bigger than 4 * 256 Bytes
- File open flags might be incorrect
- Implement encryption