[gcb0]

do what every lock do for the last century: do not leave screws outside.

further, I'd have one module inside the door, a little wire just connecting a dumb button to the outside.

granted installation would require a single drill hole, but it wouldn't be a huge fail like this.

[wingerlang]

But the module seems to have a camera.

[TeMPOraL]

Make it two drill holes then.

[pbhjpbhj]

Or just fit the camera in the bell push housing.