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From the programming manual:
PS (Transceiver Power Status; GET/SET)
SET/RSP format: PSn; where n = 1 indicates transceiver on. Note:
PS0 turns the transceiver off, but this removes
power, so PS1 cannot be used to turn it on. To turn power on,
the K3’s POWER_ON line (aux I/O jack) must be
pulled low by an external device, or it can be turned on
manually using the power switch.
Pin 8 is power on, only (<50 ms required).
So causing the Arduino to send the CAT command at
the proper time is your only graceful solution to power down.
On 3/2/2021 12:16 PM, Michael Foerster
I have a K3s that I use with an Arduino to allow me to run
remotely using RemoteHams.com.
The Arduino pulls the Pin 8 of the 15 pin connector. There is
also a timeout timer so that if case I loose comms with it when
I'm remote, I know that it will shut off the rig by turning off
the AC/Power Supply after so many hours.
Problem is, when it does shut off by dropping the 13.8 VDC, it can
corrupt the memory in the K3s, it's happened several times.
Is there any other way that the Arduino can shut off the K3s
(toggle the pin 8 again???).
I know that you can shut off the K3 through the serial port
using the "PS0" command, but in my case, that's not a viable
Any other way to SAFELY turn off the K3?