Same thing happened to me- my family had it where all the alarms would go off at some random time usually like every hour ish because my brothers alarm needed battery changed.
THERE'S A SMOKE ALARM IN MY ROOM AND EVERY SO OFTEN IT WILL GO BEEP!!!!!!!1! AND SOMETIMES IT GOES OFF AT 4:00 AM SO MY MOM BOUGHT A LADDER AND BEAT IT TO DEATH WITH A BROOM!! JK MY MOM REPLACED THE BATTERIES. WHICH WAS GOOD BECAUSE IT'S BEEN HAPPENING FOR LIKE 2 WEEKS NOW AND IT WAS JUST DRIVING ME UP THE WALL. ANYWAY HOW ARE Y'ALL?