A C++ Keyboard Library for the DigiSpark; provides much more options than the default such as backslash
I found this while searching for a solution to a backslash probelm - when typing a double backslash in IDE it would produce a hash '#' - other symbols were incorrect. Credits go to Obdev's AVRUSB code
Replace the DigiKeyboard.h in /ArduinoData/packages/digistump/hardware/avr//libraries/DigisparkKeyboard/ with this one.
Backslash was achieved by using "DigiKeyboard.sendKeyStroke(KEY_INTL_BACKSLASH);" in code.