Try Preventing the Bluetooth Wake Ability if Your Mac is Randomly Waking from Sleep
Many Mac users choose to put their computers to sleep when they’re not in use, and unless Macs are scheduled to wake at a specific time, the computer should stay asleep until it has been manually awoken by user input, like a key press or mouse click. Should of course is the operative word here, because some users have discovered that their Macs are waking from sleep seemingly at random, with no obvious reason for this to happen.