[Elecraft] K3S Power On / PTT

[Marco HB9CAT]

I configured my K3s to use DTR to key CW, (CONFIG:PTT-KEY to “Off-RTS”) and configured my logging program (Dxlog.net) accordingly; the COM port I’m using is the K3s virtual serial related to the USB connection. Everything worked fine.

Later on I unplugged the K3s to use it in another location, where I’ve just connected power and antenna (no USB); right after powering it up it went to TX, USB RTS was probably in an undefined state being interpreted as high so it keyed CW.
I knew that might be the problem so I tried to access the CONFIG:PTT-KEY menu: there was no way to get there while the K3s was stuck in TX, as usual I got to the the “FW Revs” default config menu but I couldn’t move to the other menus.

The only possible solution has been to get hold of a PC, install USB drivers and set RTS low.

Question: is there any alternative power-up sequence to enter a sort of safe mode allowing me to change configuration ?

Thanks

Marco HB9CAT

P.S.: all firmware revisions are the latest