CAN NOT USE SERIAL(UART) PORT FOR FOR BANANAPI R2 PRO

[Fatih Alparslan]

Armbianmonitor:

https://paste.armbian.com/qaloqekipa

Hello Armbian Team

 I have one banana pi r2 pro board(https://wiki.banana-pi.org/Banana_Pi_BPI-R2_Pro). I used Armbian_community_24.5.0-trunk.667_Bananapir2pro_bookworm_current_6.6.31_minimal.img(https://github.com/armbian/community/releases/download/24.5.0-trunk.667/Armbian_community_24.5.0-trunk.667_Bananapir2pro_bookworm_current_6.6.31_minimal.img.xz) . I want to use 4 serial port. But when I tried to "cat" command, it gives  Input/output error. I tried to screen too but it terminated immediately. it can see there is 7 uart interface ,but only ttyS2 works, for terminal how can I use other uart interfaces. 

:~# ls -l /dev/ttyS*
crw-rw---- 1 root dialout 4, 64 May 24 14:17 /dev/ttyS0
crw-rw---- 1 root dialout 4, 65 May 24 14:17 /dev/ttyS1
crw------- 1 root tty     4, 66 May 24 14:22 /dev/ttyS2
crw-rw---- 1 root dialout 4, 67 May 24 14:17 /dev/ttyS3
crw-rw---- 1 root dialout 4, 68 May 24 14:17 /dev/ttyS4
crw-rw---- 1 root dialout 4, 69 May 24 14:17 /dev/ttyS5
crw-rw---- 1 root dialout 4, 70 May 24 14:17 /dev/ttyS6
crw-rw---- 1 root dialout 4, 71 May 24 14:17 /dev/ttyS7
Thanks,

Best regards

[Werner]

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