Oh, they just left you some extra patch cables? That was nice of them.
The wavelength of the fiber might be printed on it. I know some fibers are color-coded based on their wavelength, but I don’t know if it’s universal.
You’ll need to match the modules to the fiber.
There definitely are optics available for single mode. The problem is that the wavelength will need to match what you are being sent from your provider. So we can’t really answer your question, you will have to ask them.
1310nm is quite common but we can’t assume your link is 1310nm.
This lock has a keypad, so the kid just needs to remember that. It has a key also, but if the kid never has the key, they can never lose it.
Maybe you can go a bit lower tech. There are “smart” door locks with a keypad that have Bluetooth, but are not otherwise cloud enabled. Then find a small device you can use as a Bluetooth proxy and position it near the front door, to keep tabs on it. Our lock is from Kwikset, and while there is an app to program it, once it is programmed it is pretty much stand-alone and won’t need the app anymore.
The lock does have Home Assistant integration but I haven’t tried it yet because I haven’t done the Bluetooth Proxy yet.
It’s because when you first buy the thing, you don’t want to get rid of the box right away, in case you need to RMA it. So it gets put in the pile along with the rest of the boxes. Then you’re in the same place for years and the pile gets bigger.
I do a decent job with culling the boxes, and even toss obsolete tech now and then, but I have been hoarding hard drives for 30 years. It seems more trouble to securely dispose of them than to just let them pile up. I even still have IDE drives and am not quite sure whether I have an adaptor that can read them. But I can’t throw them out, because I don’t know if I have sensitive info on them.
Can you rent a degausser?
Congratulations
It just means you need to figure out how to route between them, that’s all.