With ALARM command you can read / set an alarm the Carberry RTCC. When the alarm time is reached by RTCC then an EVNT RTCC is triggered

RTCC ALARM <hh:mm>|OFF

ALARM accepts three parameters as:

ALARM command returns current alarm set if no parameters are provided.

Reading current alarm status

RTCC ALARM
OFF
OK

RTCC ALARM
14:48
OK

Adjusting RTCC alarm

RTCC ALARM 17:46
OK

RTCC ALARM OFF
OK

When alarm is triggered an event EVNT RTCC is transmitted to Raspberry. If system is in sleep then RTCC alarm will wake-up it and no event can be read because of power-up delay. When the system it awakened by RTCC alarm then it will begin a shutdown procedure unless from Raspberry will not arrive IGNITION KEEPALIVE commands to keep system awake