Number of serial GPIO

Banana Pi SBCs design BPI-M2+/BPI-M2 Zero/BPI-P2 Zero(H3)
1

Hello I am looking to know the default port number of GPIO serial port as /dev/xxxxx

Sorry for my english

Thanks for your reply !

2

please see here :

https://bananapi.gitbooks.io/bpi-m2-/content/en/bpi-m2+uart.html