The system must be able to control locks, react to motion sensors, sound an alarm, flash a LED and be unlocked with a key card and a simple web interface for locking and unlocking.
## Løsningmodel
## Challenges
## Udfordringer
### TLS encryption
We tried implementing TLS encryption on the MQTT connection.
It worked great between the MQTT broker and the controller, but the ESP's had some difficulty validating the brokers certificate.
This was probably caused because of the MQTT library we used, which doesn't natively support TLS, but relies on the platforms implementation of TLS, which didn't work great together.
If more effort and a bigger willingness to rewrite big parts of the device code it could be achieved.
But we didn't prioritize it, because it isn't necessary for a working prototype.
### Network
Of course we had problems with the network. As the schools network was very unreliable, or even nonexisting at times.
This was mostly just a point of frustration, but didn't really cause any real challenges as we solved it by running our own hotspots.
