I run our main application from init.d/rcS. I changed the debug channel to use the serial ttySAC2 console instead of the default ttySAC1 in the liniux_cmd_line. Sometimes the program does not start when the RS232 converter is not connected evidently because of noise on the RX line. Has anyone had the same problem or knows a software method to switch the console on only when needed? When posting my previous message I received an error and unintentionally sent it twice. If anyone has any ideas I would be grateful. In the end, I would like to view the debug information also by telnet. Thanks