thnx a lot!!!
the code is now working!!
here it is:
time_t alarmOnTime = (10 * SECS_PER_HOUR) + (41 * SECS_PER_MIN);
time_t alarmOffTime = (10 * SECS_PER_HOUR) + (42 * SECS_PER_MIN);
//time_t alarmOffTime = alarmOnTime + (30 * SECS_PER_SEC);
time_t nextAlarmOff;
time_t nextAlarmOn;
nextAlarmOn = previousMidnight(DateTime.now())+ alarmOnTime;
nextAlarmOff = previousMidnight(DateTime.now())+ alarmOffTime;
if ( DateTime.now() >= nextAlarmOn && DateTime.now() < nextAlarmOff){
digitalWrite(ledPin, HIGH);
}
else
{
digitalWrite(ledPin, LOW);
}
}
}
now I'm curious to set exact seconds to turn of, not minutes, something like
time_t alarmOffTime = alarmOnTime + (30 * SECS_PER_SEC);
but SECS_PER_SEC don't exist
and also I'll need to slowly start led...
PaulS, you saved me 