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,

moved

I solved this issue.  The manual from Orange PI does not come with clear GPIO pin definition.  

 

I should have used PIN #19 and Pin # 21, and the pin #1 is the top right pin.

 

Thanks,