I just created a very simple fully automatized check-in system.
It basically detects a new reservation, generates a smart door code (which works only for the duration of the reservation), and sends a welcoming message with the code to the guest on the airbnb app.
Now I can sleep well and take all during-the-night reservations =D.
I'm a software engineer with 17+ years of experience and did this in my spare time =D.
I felt like sharing this. Because it might help a lot of hosts!
Is there anyone interested to join?