A smoke alarm is read as an early warning from your own instincts. Its beeping is traditionally taken as a part of you asking for attention before something builds up.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.