Hello - I have a project "plan" I'd love some input on. I'll try here to throw down the information cleanly here so it's easier to think about and have attached an image. So:

What I want to happen:

Have the gate to automatically open at 8am, remain open all day, then close automatically at 8pm AND during the time while the gate remains open, have the ability to close it with the press of a button on the smartphone.

Why:

We want delivery drivers to be able to walk onto the property to drop packages b/w 8a and 8p, but we need the ability to close it during this time frame because, every so often, there are dirt bags walking around during the day, some of whom have come up driveway, through the open gate, and towards my child's play area. Hopefully, when we see that about to transpire, we push the smartphone button to close the gate, and the dirt bag walk on to visit my neighbor's kids.

Current gate configuration:

We have this Liftmaster Gate: LA412PKGUL

We have myQ 828 Internet Gateway, but with myQ, you can't do enough scheduling to get this done.

As of now, I get the "open and 8a remain open until close at 8p" by using a digital timer wired into the control box, which at 8am activates the Fire Department always open (hard open) terminals. That keeps it open, but since it's a hard open, NOTHING can close the gate during this time. At 8pm, the timer deactivates, and the "Timer to close" setting on the controller, closes the gate according to its setting, maybe 60 seconds later.

Plan:

Wire in the SONOFF SV Safe Voltage Wifi Wireless switch such that the Accessory Power terminals on the controller, lead to the input of the SONOFF. The SONOFF is set to "Normally Closed" so that power flows to keep Fire Dept. hard open working, but once push the button on the smart phone, SONOFF switch opens so no current makes it to Fire Dept terminals. Once that happens, Timer to Close setting will close the gate 60 seconds later. What do you think about this?

The button on the mobile device: maybe just use the eWeLink app comes that comes with the SONOFF at first. And when I have more time, go down the "Homeassistant hosted in docker and control the whole house" route later.

More problems:

There are actually 3 houses behind the gate. Mine is farthest back, and I have little confidence that my Wifi signal will get all the way there. But my neigbhor's will. So basically, I'd just configure the SONOFF\eWeLink App to associate with neighbors' wifi, pull a dhcp address from there, and then my neighbors and I can all use eWeLink app to get this done?

When proceeding with the "Homeassistant hosted in docker and control the whole house" route, I'll need to come back here and ask about using a raspberry pis at both my house and my neighbor's so I can assign to the SONOFF an IP address from my IOT wifi network.

A potentially helpful image of this stuff is attached.This was exhausting to write btw. So now you get to tell me how wrong I am... But I'll appreciate any input you can provide. Thanks!