I'm trying to check if UART on my Orange PI is working.
I've enabled UART via armbian-config and rebooted OPi.
root@orangepipc:~# dmesg|grep tty
[ 0.000000] Kernel command line: root=UUID=e5185d19-ff08-47bb-8673-1779ef917d92 rootwait rootfstype=ext4 console=ttyS0,115200 console=tty1 hdmi.audio=EDID:0 disp.screen0_output_mode=1920x1080p60 panic=10 consoleblank=0 loglevel=1 ubootpart=530c2b83-01 ubootsource=mmc usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_fb_mem_reserve=16 cgroup_enable=memory swapaccount=1
[ 0.000189] console [tty1] enabled
[ 1.975487] console [ttyS0] disabled
[ 1.995636] 1c28000.serial: ttyS0 at MMIO 0x1c28000 (irq = 42, base_baud = 1500000) is a U6_16550A
[ 1.995692] console [ttyS0] enabled
[ 2.018619] 1c28400.serial: ttyS1 at MMIO 0x1c28400 (irq = 43, base_baud = 1500000) is a U6_16550A
[ 4.800597] systemd[1]: Created slice system-serial\x2dgetty.slice.
Device file exists, but when I try to listen it there is nothing in output.
I tried simple test using cat and echo:
cat < /dev/ttyS1
echo "test" > /dev/ttyS1
as well as minicom and connected nodeMCU which sends a message every second towards UART.
Still nothing in /dev/ttyS1 output.
Please advise probably I do something wrong while checking UART?