I want to use UART1 or 2 (see picture) on the Orange Pi zero. But when I try to open the port with screen /dev/ttyS1

Screen terminates.

I found here that I needed to add "overlays=sun8i-h3-uart1" in /boot/armbianEnv.txt but someone on that forum said that that feature is not yet supported. I tried, but I still have the same problem.

Any suggestions?

Orange Pi Zero pinout

uname -a
Linux orangepizero 4.11.9-sun8i #1 SMP Thu Jul 13 16:09:43 CEST 2017 
armv7l armv7l armv7l GNU/Linux
  • Do you have the appropriate cable? – Rui F Ribeiro Feb 23 '18 at 18:23

My config on Orange Pi Zero for UART on mainline kernel:

overlays=usbhost2 usbhost3 uart1 uart2

Both UARTs work fine.

$ uname -a
Linux orangepizero 4.13.16-sunxi #20 SMP Fri Nov 24 19:50:07 CET 2017 armv7l armv7l armv7l GNU/Linux
  • So, could be this issue related to kernel version? (Dmitry is on the 4.13 kernel series while MatMis is on 4.11)... – mattia.b89 Dec 3 '17 at 14:13

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