It was the dawn of the third age of mankind
The way I use them is to reflash the firmware with ESPHome, at which point they have nothing to do with Sonoff. I got really into these things when they came out and made a video about the process: https://youtu.be/Kdf6W_Ied4o?si=4nh7kP28IglwVHBx. There are a bunch of different ways to use them including retaining the original software, but I kind of stopped paying attention when I got mine working.
It's worth noting that they have two different products. The "NSPanel Pro" is completely different, I think it runs Android. I haven't played with that at all.
I have one Kindle Fire using the Fully Kiosk Browser and a wall mount with a hidden power cord (https://a.co/d/05GVxVP). It uses the camera to turn on when you walk up to it. It’s ok, but I installed it 3 years ago and never really finished making a dashboard for it. In practice, we control the vast majority of stuff by voice with the Google/Nest Home integration, or switches. The big control panel thing doesn’t hold enough interest to even bother putting controls on it, and I mainly leave it showing air quality graphs.
Of more practical use are smaller panels for area-specific uses. I mainly standardized on NSPanel, because I was experimenting with them and ended up with a bunch. Example: https://youtu.be/DBzg7v1Q5Zo. I have a short attention span and tend to stop when it’s 90% good enough. I also have in other places a DIY HA SwitchPlate, and HASPone on a Lanbon L8.
I guess I didn’t understand what you were describing. When we moved in to our house, the previous owners had a deadbolt that locked with a key on the inside instead of a thumb turn, and it was the only way to lock the door. This is a pretty bad idea since it creates a potential situation where you’re stuck inside your house, or have to find another exit. In some emergencies, seconds count. Even if you know how to open the door, you might have someone over who doesn’t, which is why fire codes are the way they are. Someone unfamiliar with the setup, panicking, in the dark, in a room full of smoke, needs to be able to escape without solving a puzzle.
Because I already had experience with having to replace that lock with an appropriate one for an exit door, I jumped straight to the assumption that when you said “lock on both sides”, you were talking about a key, and not just a childproof latch of some kind. I have the privilege of not living with anyone who is a flight risk, so it’s easy for me to just dismiss it as unsafe. I looked at some of the solutions out there and they seem to be designed to stop toddlers with no dexterity, not an autistic person determined to turn all the things. Sorry if my answer was unhelpful; people are injured or killed every day because they created a situation they didn’t realize was hazardous until it was too late. My intention was only to prevent the downsides of locking the door this way from being overlooked.
Hot damn do I love gloves. I bought a 5000-count case five years ago and I’m just about out of them. Turns out making it easier to touch icky things like the sink strainer was well worth the $50.