this function is not implemented yet, but we have decided to add it to the code in a few days.
Right now the remote module sends MQTT message when the button is pressed, so it is possible to wire the reed switch paralel to the button. But it also sends pairing message when the button is pressed longer. So it can have some side effects. We will create software library which will monitor some unused pins and the module sends MQTT message when the state changes - so you get message when the switch makes the contact and another message when switch breaks a contact.
Let me know if this will work for you.