Cannot get access to UART or any other GPIO function

[emusman-lab]

Hello! I am using orangepi 5B plus with latest ubuntu 22.01 from here (https://github.com/Joshua-Riek/ubuntu-rockchip/releases/tag/v1.30 ). I have attached arduino to serial 0 and want to read the data. However i cannot find /dev/ttyS0 in terminal here is my output of dmesg | grep tty. [ 2.147534] Kernel command line: root=UUID=7353bfc8-aee0-4b74-a1f6-d87826c03972 rootfstype=ext4 rootwait rw console=ttyS2,1500000 console=tty1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1 systemd.unified_cgroup_hierarchy=0 quiet splash plymouth.ignore-serial-consoles [ 2.551969] printk: console [tty1] enabled [ 2.587866] Registered FIQ tty driver [ 3.579405] printk: console [ttyFIQ0] enabled [ 3.579504] Registered fiq debugger ttyFIQ0 [ 4.509589] febc0000.serial: ttyS9 at MMIO 0xfebc0000 (irq = 113, base_baud = 1500000) is a 16550A [ 7.838861] systemd[1]: Created slice Slice /system/serial-getty. [ 8.917919] [dhd] [INIT] logset:8 is preserve/chatty [ 8.919261] [dhd] [INIT] logset:10 is preserve/chatty [ 10.270645] [dhd] [INIT] logset:8 is preserve/chatty [ 10.271863] [dhd] [INIT] logset:10 is preserve/chatty [ 21.247453] ttyFIQ ttyFIQ0: tty_port_close_start: tty->count = 1 port count = 2 I have followed your instructions from these two links (https://github.com/Joshua-Riek/ubuntu-rockchip/wiki/Device-Tree-Overlays https://github.com/Joshua-Riek/ubuntu-rockchip/issues/212) to modify the ubuntuEnv.txt file but still i get the same output from the dmesg | grep tty as above. here are the contents of my ubuntuEnv.txt file bootargs=root=UUID=7353bfc8-aee0-4b74-a1f6-d87826c03972 rootfstype=ext4 rootwai> fdtfile=rk3588s-orangepi-5b.dtb overlay_prefix=orangepi-5 overlays=rk3588-uart0-m2.dtb Here is the output of ls /boot/firmware/dtbs/overlays/ | grep rk3588-uart0 rk3588-uart0-m2.dtbo

Please let me know what i am doing wrong here