When switching OFF the K3 remotely, you need to send the PS0 command before you switch OFF the PSU. To switch ON again you need first switch ON your PSU and then and then briefly ground pin 8 of the ACC. However with some devices with relay control via GSM/SMS (which is what I am using) you can close and open relays, but there may not be available an automatic brief relay closure. What I do is simply to always open the "Pin 8 relay" after sending PS0 and before switching OFF the PSU. The only way I can be sure that the "Pin 8 relay" has opened is by listening for a very weak "hump" in the audio, indicating that the K3 has switched OFF. If I am in doubt (which may easily happen in noisy environments) I have to send a relay-status request by SMS. Therefore it would be a help if the K3 could produce an audible "dit" as the very last thing before it switches OFF.
For clarity the sequence I use is as follows:
Switch ON
1) SW ON PSU
2) Close "Pin 8 relay"
Switch OFF
1) Send PS0
2) Open "Pin 8 relay"
3) Listen carefully for K3 switching OFF
4) SW OFF PSU
I just got used to do it this way - maybe there are smarter ways.
But doing it this way, it would be a great help if the K3 could make an audio "dit" just before it switches OFF.
Would this be annoying for most users? If so it might be made selectable.
Poul-Erik, OZ4UN
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