Corrupted display name when passing c_str() to begin()

[kafana]

Corrupted display name when passing c_str() to begin()

[HomeSpan]

This is because the homeSpan.begin() function does not copy the full character array for any names passed to it (though I probably should do that in a future update). It only copies the pointers.

This means that if String is declared within setup(), it will go out of scope once the setup() function is completed by the time homeSpan.poll() is called within the main loop(), and the pointer to displayName will likely no longer be valid. Depending on the sketch, the memory occupied by displayName may or may not still contain a valid character array. If this worked in 1.8.0, it was only by luck.

The workaround is to define your String as a global variable instead of within setup so the name is retained and can be used once homeSpan.poll() is called. I'll see about reserving space to copy the full string in a future update.

[kafana]

This means that if String is declared within setup(), it will go out of scope once the setup() function is completed by the time homeSpan.poll() is called within the main loop(), and the pointer to displayName will likely no longer be valid. Depending on the sketch, the memory occupied by displayName may or may not still contain a valid character array. If this worked in 1.8.0, it was only by luck.

Thank you for the clarification. I've been using the same pattern for both serial numbers and pairing codes. I will transfer all related data to a global scope until a permanent fix is implemented.