Hammerspoon script to change Microphone from AirPods to MacBook Microphone

init.lua

local MICROPHONE_DEVICE_NAME = "MacBook Pro Microphone"
function detectAirPods(event)
    if event ~= "dOut" and event ~= "dIn " then
        return
    end


    local device_name = hs.audiodevice.current().name
    if device_name:find("AirPods") == nil then
        return
    end

    local microphone = hs.audiodevice.findInputByName(MICROPHONE_DEVICE_NAME)
    if (microphone ~= nil) then
        microphone:setDefaultInputDevice()
--         hs.notify.show("AirPods", "","Use "..MICROPHONE_DEVICE_NAME)
    end
    hs.notify.show("Mic","Current device",hs.audiodevice.defaultInputDevice():name())
end

hs.audiodevice.watcher.setCallback(detectAirPods)
hs.audiodevice.watcher.start()