Running Jeedom under ARMBIAN 23.02.2 Buster with Linux 5.15.93-sunxi on Orange Pi PC+ for 2 years I suddenly met the problem just after the upgrade/update of Linux.
I've check TTYS0 input. RS232 frames from my Power Meter 5Linky, I'm living in France) are OK.
I tought my SOC or Linux Armbian is down. You gave me the answer.
We just have to wait for next Armbian release, I beg.
Cheers.