Hammerspoon script to disable bluetooth when the computer is put to sleep. Requires `blueutil` to be installed (`brew install blueutil`).

bluetooth_sleep.lua

function bluetooth(power)
    print("Setting bluetooth to " .. power)
    result = hs.execute("blueutil --power " .. power)

    if result.rc ~= 0 then
        print("Unexpected result executing `blueutil`: rc=" .. result.rc .. " type=" .. result.type .. " output=" .. result.output)
    end
end

function f(event)
    if event == hs.caffeinate.watcher.systemWillSleep then
        bluetooth("off")
    elseif event == hs.caffeinate.watcher.screensDidWake then
        bluetooth("on")
    end
end

watcher = hs.caffeinate.watcher.new(f)
watcher:start()