I’m assuming you have 2 outdoors and 1 indoor station. Have you tried to register both again to the indoor? As far as I remember the registering procedure changed with one of the latest firmware and I had to redo the whole registering process to get it working again.
1. I believe it can as I tried it myself and the main unit recognized both keypads and both would work to open the door.
2. I don’t know what the TF card is for
3. When connected to an NVR the station records clips whenever someone calls. depending on the NVR you can also trigger recording when...
I’m looking for this capability too. My use case is 2 stations, one for access to the property through the gates and the other for access to the house. both connected/paired to an indoor station. I want to be able to give the gardener an access code for the gate, but not for the house. And...