Am 11.12.2023 um 16:39:47 Uhr schrieb Rachid Oubelk: > We received this message from our software based on the errno utility > (Linux Errors). The Debian used is installed on a controller that has > two serial ports (RTU) and two LAN ports (TCP). When we test these > two serial ports, we notice this error.
Can you connect the serial port to a computer and rund minicom to see the tty? Does that work?
