First of all great that you offer us a firmware with the core implementation to easily reach such a low power consumption during sleep, combined with the option to add our own “applications” !
The RAK5205 is a very nice board with great options. One thing I would like to do still is add an option to present some info to the user using up only very little power. To fulfill this requirement I am looking into using an a e-paper display. Most affordable (small) displays use a SPI interface. When looking at the new RUI API, SPI is however not supported on the 5205(RAK811). I am not an stm32 expert - so correct me if i’m wrong-, from what i understand however, the SPI 1 AFIO5 pins PB3,4,5 seem to be present on the IO pins of the RAK811H(868) module. For output only (spi write only), only PB3 and PB5 would be needed (PB4 has led connected). Is such a SPI option planned or can it be added as future API update for the RAK811 ?