UART doesn't work on OrangePi One

[mchelik]

 Hello,

I want to read data from UART3 on OrangePi One. I want to use UART3 (pin 8 & 10), so I enabled uart3 overlay at /boot/armbianEnv.txt. Now I expect to read data via minicom -b 115200 -D /dev/ttyS3 but I read nothing unfortunately. What am I missing? Any help is appreciated.

 

I'm using Linux orangepione 4.19.38-sunxi (sorry, armbianmonitor doesn't generate link)

 

Thank you,

Regards

[martinayotte]

3 hours ago, mchelik said:

but I read nothing unfortunately.

Did you tried with a simple loopback wire or jumper between pins 8 and 10 ?

It should work as is ...

[mchelik]

Thank you so much dear Martin for your reply.

Turns out I have to connect Orange Pi's ground to Aruino's ground and now it works. Your comment made me solve it. Thanks. Hope this comment can help someone in the future.

Best regards