Originally Posted By: JBjorgen
Originally Posted By: K447
Is there power (AC or doorbell voltage) to the gate lock area?

If not, you are thinking of a battery powered solution?


I can run the power myself. Don't need electrician or permits here (or if you do, they never enforce it). It would be less than 10 feet of metal conduit with wires in it.
I am thinking of something like these.

Send a coded SMS to the SIM mobile number of the module, it closes a relay to release the electric door latch. Security would primarily be the secrecy of the SMS number and what code the module was set to respond to.

Choose a module that allows you to reprogram the open code, or even better, issue different open codes to different staffers. If a staffer is to be no longer authorized you can change just the code assigned to the- at person.

There are similar products sold for remote driveway gate opening, garage door openings, and more general ‘relay closure’ tasks.

I presume you would be enclosing everything inside a secured electrical box, plastic to allow radio communications.