RS232 activation

[ReneHegewald]

Hello,

 

i like to activate / use more RS232 UARTS.

What is the best way to do this ? 

 

Thanks a lot,
René

[Werner]

Check armbian-config for DTB overlays.

[ReneHegewald]

i had .. but i don't understand what todo to activate ...

[Werner]

Once chosen and restarted check dmesg for activated serial consoles. They probably pop up as devices like /dev/ttyS1 and so on.

[ReneHegewald]

i can only edit the DTB File .. there is no point for DTB overlays

[Werner]

armbian-config, go to system, go to hardware

then you see a menu like this:

 

 

Check for uart options.

[ReneHegewald]

Hi Werner,

 

i tried, but it does not work. i see the Overlay Settings in the armbianEnv.txt

After Linux was bootet, i don't see the new Serial UARTS in "dmesg" o neither in /dev/ttyS*

 

[Werner]

I dont have this hw. Need somebody with the board to confirm if either it works or not.

[ReneHegewald]

@linhz0hz can you please test and verify ? 🙂

[ReneHegewald]

@tkaiser have you a change to verify this ? 🙂

[Igor]

If its not in the menu, it means overlays weren't developed. Our capacity for development is limited as with this its not possible to hire many people that will serve you. We will probably do this once, but we have many many other issues to fight. If you are asking Armbian volunteer maintainers to sponsor development (for your business or fun), you ask once, then perhaps go and hire professional to do the coding for you and then you share with others. This is how you can make someone else happy.

 

No offence, but project owes you nothing, contrary. 

If this is something critical for you, then it won't be a problem supporting people that helps you? If you want to get a quote for developing this, you need to be at least gold partner. This is how we try to cover the loss of providing software for free. For you and open source pirates that are not contributing to open source while providing Armbian under different name(s).

 

Please do not @call people if they aren't your friends.

[ReneHegewald]

Hi Igor,

 

it is for fun 🙂 and learn ... the Overlay is in the Menu, but does not work .... and i don't know how to debug this.

 

Best regards,
René

[Marco Schirrmeister]

Rene,

 

with an installation of the official image like Bullseye with the 5.10 kernel, it should work. Maybe you did some modifications? If so, try it with a fresh installation.

Without any changes I can see "ttyS6".  After enabling all uart in armbian-config, I can see more after a reboot.

root@rock-5b ~# ls -la /dev/ttyS*
crw--w---- 1 root tty     4, 66 May 24 08:55 /dev/ttyS2
crw-rw---- 1 root dialout 4, 67 May 24 08:55 /dev/ttyS3
crw-rw---- 1 root dialout 4, 68 May 24 08:55 /dev/ttyS4
crw-rw---- 1 root dialout 4, 70 May 24 08:55 /dev/ttyS6
crw-rw---- 1 root dialout 4, 71 May 24 08:55 /dev/ttyS7

 

In the images from balbes150, with some 6.x kernel, I think you can see more ttyS by default.

 

Edited May 24, 2023 by Marco Schirrmeister