remote shutdown

[ElektronB]

Hi first of all I'm very happy with your ups, thanks a lot for making it. :)
But I want to ask if it is possible to turn off the ups by a uart cmd?

I'm using your ups to protect my storage from writing errors but if I turn off the power I want to shut down my pi and maybe 10sec later the ups.

At the moment the ups stay active until the battery is completely discharged.

What I need to do is:

1. AV Power aktiv -> UPS turning on -> Pi turning on

2. everything is running and the Pi uses the uart to monitor the AC input.

3. AC input fails, my script will wait 60 sec and then initiate the save shutdown on the pi.

4. during the shutdown of the pi I would like to add a small script that sends a short cmd to the UPS to completely cut power in X Sec as if the batterie were empty. something like "UPS_Stop,60\n"

4.1 an even better way would be to monitor the output current of the ups and if the output current drops below X mA we know that the pi is powered off and we can power down the UPS until AC Power comes back again.

6. the UPS should stay in a stop or sleep state until AC power is active again.

If you share your code, I should be able to add this function, so i would love to get in touch with you.

Best Regards,
Sascha

[rsep2]

I have the exact same situation, where I need to power down the UPS after a Raspberry Pi shutdown on external power failure, and to restart it when the power is back up.

I'm powering the RPi from the 5v pins directly to the GPIO.

In the meantime, if no UART commands can be sent to put the UPS in sleep mode, I will try to add a diode to the 5v line, from the UPS to the RPi to see if it detects that the Pi has shut down completely and see if the UPS enters into sleep mode. Will report in a few days.