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I recall that both of my Icom xcvrs have a pull-up resistor to a positive rail on the PTT input and expects the external device control signal to perform a short to ground on that to activate PTT (usually via an open collector driver, or mechanical relay). Some external devices do the opposite, ie applying a positive voltage for PTT, and sometimes depending upon the external device it is configurable. SO, for example, your RTS line out of your control device may be toggling positive voltage AND may otherwise be floating. If you have a DMM, or oscilloscope, to check this perhaps that will give you some clues.
Not saying this is your issue, just suggesting something to look at that may possibly be related. You may wish to start with checking the schematic diagram for your Icom, and checking the PPT input with a DMM to see what voltage state it is currently in; if it’s a positive voltage that it may expect grounding and you can short it to ground to see if the radio goes into Xmt; if it’s floating, then it’s the opposite where it expects either a positive or negative voltage to activate its internal interface chip/xstr. I have run into this several times in the past interfacing laptops to various brands of radios, esp when using a virtual serial port driver with various interface cables.
Best is if someone here with your Icom model and same external control device/cables responds.
Stephen W9SK
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John,See, I was right, I did miss something! Yes, I have read the document on ARDOP but I didn't read and understand that particular section. I struggled with the audio part for a while, and finally got that working, but missed the detail about the Icom PTT strings. Also, I ran rigctld because I read somewhere else that needed to be run. I assumed that the ARDOP modem used HamLib to do the CAT control. Am I correct in assuming that like JTDX, the ARDOP modem starts the rigctld and I just need to supply the port with the -c option on the ARDOP ?I'll give the strings a try here shortly! Thanks for the input.On another subject, I see you have terminal program for PI, is there one for Ubuntu or other Debian distros?Regards and thanks for the help,Bob - N4RFCand Stephan and Arron, I am using a CAT PTT not a hardware PTT. Thanks!
You can't key a 7100 using RTS over the virtual port - you have to use cat commands. Have you looked at
https://www.cantab.net/users/john.wiseman/Documents/ARDOPC.html?
I suggest you try
./ardopc_64 8515 plughw:1,0 plughw:1,0 -c /dev/ttyUSB0 -k FEFE88E01C0001FD -u FEFE88E01C0000FD
Why are you running rigctld?
73,
John
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