Null Pointer Exception with Arduino Communication

[glv]

Hello @PapiAli,

Some resources here:

• Arduino Serial Part 1 | Martyn Currey
• Arduino Serial Part 2: Serial Data | Martyn Currey
• Arduino Serial Part 3: Getting started with serial communication | Martyn Currey
• Arduino Serial Part 4: ASCII data and using markers to separate data | Martyn Currey

:)