Dear Mike, thanks for the reply,
after retyping more time all the parameters, the CI-V is working now, I can not say what was the wrong data. Just a remark, the USB socket matallic shield (control side) was not welded to the board. It allow the socket to move making difficult to insert the plug. Of course after welding, all is ok now.
Regarding the PTT, I use an interface connected to the USB port. The interface has the CAT and CW output as well as a PTT contact to switch the transceiver to TX when I transmit CW. If I connect the interface PTT contact to the transceiver, it switch normally but the transceiver is getting silent during transmission. In other words, I can not hear what I am transmitting. It does not happen if I use the Breack-in, without driving the PTT.
It seems that if I short the pins 2 and 3 on the DATA PACKET (on the back of the transceiver) I can transmit and hear the tone while transmitting (I made just a quick test).
My intention is to use the RTS fron CAT the serial port (pin 7) to drive the above pins 2 - 3. I hope it is possible through COM 2.
Any simpler idea?
Thanks for the support,
best 73, Alfeo I1HJT