Hardware Revision 6.1
This is a bugfix release of the v6 board. It uses a new chip for power generation, the TPS65185, which should improve reliability and makes a few things easier from the user's perspective. For example, the VCOM voltage can now be set via software.
Through the use of a GPIO expander chip, 8 expanded GPIOs are available on v6, which can be accessed though the epd_board_specific.h
header.