Sorry I forgot to tell you that I am using a simplex mode. So the answer above is not relevant. I
have removed the PTT gpio 27 from the Pi and monitored GPIO pin 27 with a scope and am see that it
goes true for the short 250 ms time when the transmit button on the phone or computer is not active
or any other signals present on echolink. The 250 ms true signal is present when OPR squelch tail
setting is set to zero otherwise the signal is there for 250ms plus the squelch tail setting. The
squelch tail setting just makes the oscillation slower. I will include the schematic that I am using
I hope you don’t get confused if you don’t know how the Baoefeng Radio works.
I hear the audio in both directions just fine but that hi true on GPIO 27 makes the system oscillate.
K5OQ-R is the echolink ID.
I don’t see how to upload a file here so I have sent you and email dloranger08@gmail.com with the
file attached.
Mike
ad5su
