Xppn - Power-Up Mode (Strato Pi Ups Only) (*); Watchdog Parameters - Sferalabs Strato Pi Base Advanced Configuration Manual

XPPn - power-up mode (Strato Pi UPS only) (*)

Set the power-up mode.
If the ShutdownEnable pin is set to high when the main power is not present, the
Raspberry Pi and the whole Strato UPS board will be powered down after the shutdown
wait time, and turned on again only when the main power is restored.
You can change this behavior so that only the Raspberry Pi is turned off, and the power is
always restored after the power-off time, even if running on battery, with no main power
present.
Command Description
XPPA If the ShutdownEnable pin is set to high when the main power is
not present, only the Raspberry Pi is turned off, and the power is
always restored after the power-off time, even if running on
battery, with no main power present
XPPM If the ShutdownEnable pin is set to high when the main power is
not present, the Raspberry Pi and the Strato UPS board is
powered down after the shutdown wait time, and turned on again
only when the main power is restored (factory default)
XPP? Return current power-up mode

Watchdog parameters

The watchdog is normally disabled. To enable it, set the WatchdogEnable pin to high (the
XWEA command can change this behavior, so that the watchdog is always enabled, and
the level of the WatchdogEnable pin is ignored).
While WatchdogEnable is high, the Strato Pi controller will watch for state changes of the
WatchdogHeartbeat pin.
You should ensure that WatchdogHeartbeat flips its state between high and low faster than
every 60 seconds (the watchdog heartbeat timeout is configurable with the XWHnnnnn
command).
If the Strato Pi UPS controller doesn't see WatchdogHeartbeat changing state for more
than 60 seconds, it will initiate a shutdown procedure, rising the WatchdogTimeout pin to
high, to signal that a watchdog timeout has occurred.
If possible, you should immediately initiate a software shutdown on Raspberry Pi, and set
the ShutdownEnable pin to high.
When ShutdownEnable is set to high or 60 seconds after the timeout (configurable with
the XWWnnnnn command), Strato Pi will wait 60 seconds more (configurable with the
XPWnnnnn command, see the shutdown wait time above), then power cycle the
Raspberry Pi.
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XPPA
XPPM
XPPn
Strato Pi Logic Controller