
oh and for maple mini (clones) my common hack is to buy those cheap 32768 crystals and just solder them at the rtc osc pins
https://www.aliexpress.com/af/32768.htm ... 68&catId=0
but these days it seem most (stm32) boards come with the rtc crystal on board, these crystals tend to drift quite a bit i'd guess dependent on luck
