agreed, its the board used with their extension mother board in the more costly products, $50 is with a 4" display., then 7" & 10"
stop making me drool
i'd rather plug into the motherboard, seems neater and probably less prone to errors in counting pins or reading pin label through a maze of wires.
back to original board, there is a schematic of their stm32f103/f107 with nrf24 around, tf card is probably sdio, tft needs to be measured just to find supplies and look for possible matching interface displays.
spi flash? on which?
rtc battery is supplied, 32khz crystal is there, where's/what''s standard for an rtc?
my boards don't usually end up in a box ( of their own with psu etc )
the waveshare wiki is quite a good source of info, not sure if the code is SPL or HAL.
by now most likely a mixture.
the last cdrom in a package from them had a cube hal file. wrong one though.
sent an email suggesting they could include the full set, reply suggested copyright worries.
all of them probably exceeds a reasonable portion as with book excerpts.
still a best subset of f1, f4 & f7 would provide for most boards?
adding SPL to those being even better.