Raspberry Pi 4 - remote QRQ CW Keyboard using the AD5DZ recri keyer APPs + ZitaNJbridge
zitaNJbridge provides the near zero latency audio over ip link between the RIG/pi4 interface and the remote OP's desktop https://kokkinizita.linuxaudio.org/li...
recri keyer's CW Keyer APPs used from :
https://github.com/recri/keyer
ssh -X used to bring the PI's CW KEYBOARD onto the desktop of the remote OP...(instead of typing on a VNC screen)
the recri keyer APP filters are adjustable to provide bandpass filtering for the RIG RX AUDIO(blocks out the 5555 ptt activation tone)
for the CW TRANSMIT TONE
for the PTT ACTIVATION TONE
the O-SCOPE is the RIG's RF
the SPEC AN is the TRANSMIT CW and PTT Activation Tone(the elecraft k3s is the RIG being used and has a brick wall low pass filter that blocks out everything above 4 khz...so none of the 5555 ptt activation tone actually gets transmitted)
ADDING IAMBIC PADDLES & STRAIGHT KEY to this setup:
• adding IAMBIC PADDLES & STRAIGHT KEY ...
for more info on QRQ CW, please see our website here:
http://qrqcwnet.ning.com/
RECRI KEYER SCRIPTS used:
:~/keyer/bin $ ./keyer filt2 -filt2-length 512 -filt2-low 50 -filt2-high 3400 -grid 1
~/keyer/bin $ ./keyer filt -filt-length 512 -filt-low 550 -filt-high 800 -grid 1
~/keyer/bin $ ./keyer filt3 -filt3-length 512 -filt3-low 4855 -filt3-high 6255 -grid 1
~/keyer/bin $ ./keyer -start 'keyer-ptt@CWdelay&PTThangtime' -grid 1
~/keyer/bin $ ./keyer -start 'keyer-tone@CW keyer-tone@PTT' -grid 1
ssh - X pi@raspberrypi:~/keyer/bin $ ./keyer kbd -grid 1
ZITAnjBRIDGE SCRIPTS used:
RIG/PI audio to REMOTE OP
pi@raspberrypi:~ $ zita-j2n --chan 1 192.168.1.101 5001
Rig/PI monitor of TRANSMIT CW and PTT ACTIVATION TONE
pi@raspberrypi:~ $ zita-j2n --chan 1 192.168.1.101 7005
Receive pi/rig audio
qrq@qrq:~$ zita-n2j --chan 1 192.168.1.101 5001
Receive pi/rig's TRANSMIT AUDIO for monitoring TX tones into RIG's Line INput
qrq@qrq:~$ zita-n2j --chan 1 192.168.1.101 7005
NOTE: the PI is using the K3S's internal usb sound card as its own sound card
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