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Uart for Orange PI 4B


testertest

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Hi all,

 

I have an Armbian installed on Orange PI 4B.  I am trying to connect a flight controller to Orange PI 4B by using UART port.

 

This board has a 40 pin header.

 

I went to armbian-config, and enabled the UART1 and UART 4 which are available from armbian-config.  

 

I plug the UART port (to Pin 8  and pin 10) on the 40 pin header.  Is that port UART 4? I am not sure.   It does not work.  I tried the debug port, but the Orange PI does not start up if something is plugged in to the debug UART port.

 

The PIN layout

https://wiki.adopisoft.com/doku.php?id=4.0.0:gpio_numbering

 

The layout of the board is similiar to Orange PI One.  I know the 5 V location by using the case fan.

 

Thanks,

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