Does RF24 always need char sent and never string ?

[adrianTNT]

I have a question, I am not very experienced with Arduino. When sending and receiving data with the RF24 library:

radio.write(&my_data, sizeof(my_data));

Does my_data here always needs to be of char type ? And if not, how would that line look if my_data is a string ?

I am asking because I find it easier to append and do other operations on string rather than char.

Thank you.

[Avamander]

Does my_data here always needs to be of char type ?

It's not char, it's a char array with a specific maximum size depending on the configuration of your radio (see documentation on payload size for that information), and yes, it needs to be of that type because a bunch of bytes are roughly speaking the only thing that are transmitted by the radio.

And if not, how would that line look if my_data is a string?

The same way. But before that line you should be filling my_data with an appropriately sized part of your String.