[Elecraft] KPA500 P command not working from RPI and node red, any ideas?

[Andy Durbin]

My Arduino controller sends P.  Upper case P with no leading caret and no trailing semi-colon.  It transitions my KPA500 from "powered but off" to "powered and on" as long as the baud matches.  It's part of my power manager (If power manger needs KPA500 to be in OPER mode, but it is off, it turns it on then commands OPER mode).

I doubt the KPA500 cares what sends the P.

73,
Andy, k3wyc