I want to create a system that has an internet connection via a mobile sim and allows owners of enabled telephone numbers to switch a relay by ringing the device sim.
The system must be able to register its IP address on dyndns in order to be accessible via url.
The system will be used to allow the opening of a gate only to owners of authorized telephone numbers, who through a call to the system will activate the relay which will pilot the arm for opening.
More precisely, the device must allow me remotely, via internet connection:
1) upload a list of telephone numbers to an archive;
2) enable / disable telephone numbers indicating whether they are always enabled or a date and time of enabling and disabling
3) have a log, downloadable remotely, of the various accesses with date and time
4) The relay must remain closed for a predefined time and then open automatically
What hardware is needed?