This might be a very basic question but i'll still ask cause i'm a noob.
Explaining the complete project here is irrelevant so i'll just talk about what i want to achieve.
I want the Arduino ( NANO) to send some data from MAX30100 ( Pulse and Oximeter sensor ) to android bluetooth terminal app . I've done all i could but i dont know why the app is not receiving is not displaying what i want it show.
I'm not sure where i'm mistaken.
To keep it simple ill just add the relevant part of the code: