I`m from Germany and yousing your R26 Doorsystem.
I just thought i share some feature ideas for this system:
Single Picture "Stream"
Would be great to grab a "single" picture directly through an URL from the system. In Germany are some DECT phones available which can poll such a picture when a specific number (from the doorbell) is calling
Fileoptions with FTP (and other) Actions
Actually the system uploads a single picture with name as some syntax like "date-time...." Would be great to configure this as a fixed mode (evertime overwriting existing file, would also be workarround for the first idea) or which syntax should be used.
HTTP-Action to open the door
Since the wired solution via the relays makes it necessary to lead the wires outdoors, which is a potential security gap, a function would be a great way to trigger an HTTP action via DTMF instead of the relay.
If you are interested i try somehting more around and bring some life and ideas to this forum?

Best regards from Germany,
Carsten