Error: Transmitter Tx1 been active too long

[Aaron, N3MBH]

Are you using the VOX mode or COS. The vox is kind of finicky. I would recommend using COS for best results. Also, it might not be a bad idea to disable the other modules for testing.

73,
Aaron – N3MBH / WRFV871

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[Anonymous / Deleted User]

I am trying to use the COS. A circuit was created but modified from original format due to the Output of the Kenwood TKR-851 being different voltage on the COS Circuit. I had 2 Amateurs who knew electronics create the circuit using zenior diode and a few resisters. When tested with the volt meter this circuit produced the same results as the one that was sent in the hardware section for the COS Circuit.

[Aaron, N3MBH]

Does your circuit pull the pin up to 3.3 volts when inactive? This should be done with a pull up resister. Then it should ground the pin when active. A simple way to test this is disconnect your circuit and use a jumper to jump your GPIO pin to 3.3v pin. This should simulate a closed squelch. Then move it from 3.3v to ground and that should simulate an open squelch. You can cat the value for your COS gpio within the /sys/class/gpio folder and see if the core system is registering your input. Let me know. Thanks.

73,
Aaron – N3MBH / WRFV871

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[Aaron, N3MBH]

I didn’t clarify, but it needs a pull up resister to keep the pin from floating and vacillating back and forth between high and low states.

73,
Aaron – N3MBH / WRFV871

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[Anonymous / Deleted User]

On the COS Circuit the VCC Pin is at 3.3V when inactive as tested by a meter. When I key up a radio the VCC will go down to 240.4 mV when active. I am just not sure where to put this PIN on the GPIO Header.

Within the /sys/class/gpio directory I have

gpio30
gpio31
gpio42
gpiochip0
gpiochup32
gpiochip63
gpiochip96

Inside of the gpio30 directory which the Web Interface has the COS Set to 30 I show
active_low
direction
edge
power
sysystem
uevent
value

if I cat the value it has 0 and when I cat it while transmitting it has the same value of 0

[Aaron, N3MBH]

I still think you should try bypassing your circuit just to rule out any issues. Remind me what board you are using? Raspberry Pi 2? Beaglebone?

73,
Aaron – N3MBH / WRFV871

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