Doorbell sensor - option to invert signal

[tvgriffith]

Hi,

When using the ESP-RFID Relay Blue Board and a FusyTuly NFC RFID Access Control Keypad the doorbell function is reporting sound detected when the bell isn't in use - is it possible to provide a switch option to invert the GPIO signal detection to allow this combination to operate together. I can of course solve this with logic within Home Assistant, but it would be nice to have this as a feature of esprfid.