Last night I did more work on plcd, I worked on getting decent debugging output from the protocol stack. You can add a debug attribute, and choose in there zero or more of "protocol" and "transport". Transport logs every character into and out of the transport as it is sent/received. Protocol gathers those characters into the logical lumps it deals with before logging them. At some point I will grab the output from syslog and demonstrate the differences.

This is towards getting receiving status and commands from the PLM sorted out, it should not take long, but you know how it goes.