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OrangePi Zero+2 UART Pins




Im trying to get 2 Uarts working on an Orange Pi Zero+2.    Im using armbian Buster image for OPiZ+2

Linux orangepizeroplus2-h3 5.4.43-sunxi #20.05.2 SMP Mon Jun 1 18:26:22 CEST 2020 armv7l GNU/Linux


I added UART1, UART2 and UART3 to armbianEnv.txt   and was able to read / write on ttyS2 on pins 8 (PA00) and 10 (PA01).  

But couldnt find which pins ttyS1 or ttyS3 are on.  

I read at that UART 3 should be
Tx    PA13      Pin 24

Rx   PA14      Pin 23


Is anyone able to suggest which pins I can use for a 2nd UART and is there a file I can look in to find the configuration for the UART Overlays ?




Sorry, my mistake with wiring.  


ttyS3 does work on 

Tx    PA13      Pin 24

Rx   PA14      Pin 23


So armbian UART overlays working as required.  

Edited by ChrisO2
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