Debounce with NodeMCU with two separate functions for down/up trigger

debounce.lua

-- inspired by: http://www.esp8266-projects.com/2015/03/buttons-pushbuttons-and-debouncing-story.html
local GPIO14 = 5
local debounceDelay = <however-many-ms-your-sensor-requires>
local debounceAlarmId = <0-6>
gpio.mode(GPIO14, gpio.INT, gpio.PULLUP)
gpio.trig(GPIO14, "down", doorLocked)

function doorLocked()
    -- don't react to any interupts from now on and wait 50ms until the interrupt for the up event is enabled
    -- within that 50ms the switch may bounce to its heart's content
    gpio.trig(GPIO14, "none")
    tmr.alarm(debounceAlarmId, debounceDelay, tmr.ALARM_SINGLE, function()
        gpio.trig(GPIO14, "up", doorUnlocked)
    end)
    -- finally react to the down event
end

function doorUnlocked()
    -- don't react to any interupts from now on and wait 50ms until the interrupt for the down event is enabled
    -- within that 50ms the switch may bounce to its heart's content
    gpio.trig(GPIO14, "none")
    tmr.alarm(debounceAlarmId, debounceDelay, tmr.ALARM_SINGLE, function()
        gpio.trig(GPIO14, "down", doorLocked)
    end)
    -- finally react to the up event
end