@MrRodz If you install MMM-Remote-Control and correctly configure the ipWhiteList, it will install a generic receiver to receive commands to your MM via a local HTTP GET request.
You can then use an HTTP GET request like http://192.168.178.240:8080/remote?action=SHOW&module=module_0_MMM-GoogleMapsTraffic to trigger a module/action, switch profiles, or create your own custom actions.
I’m terms of GPIO for your doorbell, see MMM-Buttons or MMM-PIR-Sensor. It seems to me you want to receive a GPIO event, switch profiles, and start a timer to later revert your profile to the original – that’s basically MMM-PIR-Sensor (movement, turn on screen, set timer to turn off).