(2018-06-17, 06:01 PM)Smartell Wrote: Ok,
Now i have compared putty sessions in Raspbian+OpenPlotter with a clean new Raspbian only (noob) installation. Same hardware, same USB/R232 adapter, only swapping the SD card, leaving all other things in place.
In the openplotter setup could something else be connecting to the serial input as well as putty? You could try typing "startup stop" in a terminal to stop openplotter running then try putty again.