Hello, 

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 ?

Thanks
Chris

______________________

 

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 July 27, 20206 yr by ChrisO2

Hi, what you've added to armbianEnv.txt ?