WPS server on Linux or Raspberry - raspberry-pi

I configured hostapd to make an Access Point Wi-Fi network on my raspberry pi... everything works fine. It acts like a router.
Can i bind client devices via WPS? For example phones, ESP8266 that support WPS connections?

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Running Home Assistant (HASSIO) locally without an internet connection

I am new to Home Assistant and I currently have a disc image of the software installed on a Raspberry Pi 3b. I have managed to get this up and running successfully by connecting my PI to an internet connection via an ethernet cable and connecting my laptop to the same network wirelessly. The problem I am facing is that I wish to run this locally without an internet connection and simply connecting my laptop to the PI with the Ethernet cable does not seem to be working. I have tried looking around for support but I cannot seem to find much on the matter.
Home Assistant's default port is 8123 not 8023.
If there is a direct connection between your laptop and the Raspberry Pi then the chance is high that mDNS won't not work. Thus, homeassistant.local is not reachable.
Add a static IP address for your Home Assistant host and your laptop.

Create a web server using gsm module

I am using raspberry pi
I am using signalR to send data to my client browser.
If my raspberry is on the same network via Ethernet or WiFi then I can get it to work.
If I now disconnect Ethernet and WiFi and switch on my gsm module I get assigned a dhcp address like 10.126.88.4 etc
If I now go to a client browser and type that ip address in the browser it will eventually time-out and upon investigation I find the raspberry pi has been assigned a different IP address.
This happens every time I refresh the browser.
After googling I find that it is the network providers doing this to stop the gsm being used as a server gateway.
One of the solutions is to use a proxy server but I could potentially have a lot of data passing through and
my initial idea was to have client browser talking directly to the raspberry pi device using gsm and thus not going through my own server.
Is there a solution to my predicament?

2 router in cascade with 2 DHCP and remote access

The installation is in a holidays house (so no permanent internet access)
I have a 4g-Routerm (ROUTER-1 = huawei B525-b23) that enable the internet access. I switch it on one day a week.
I have another router (ROUTER-2 = GL-MT300N-V2).
ROUTER-2 is always plugged on electricity.
On ROUTER-2 is connected through ethernet port a Raspberry-Pi3 (with Home Assistant on it).
On ROUTER-2 is connected through WIFI a Camera IP
ROUTER-1 and ROUTER-2 are connected together through ethernet.
When ROUTER-1 is not plug to electricity, none have acces to internet, but it's not an issue.
The camera save picture on the Rapbery Pi3, the Home Assistat is recording some sensor data.
When I switch on the electricity on the ROUTER-1, everyone have access to internet.
What I want is to have remote Access to my router-2 and my Rasberry and my Camera when ROUTER-1 is online
How should I do ?
Hi I can think of two solutions for this setup but both involve buying a second hand cheap router.
I think the use of a single router would make this setup a lot easier. Any router would work that supports:a USB 4g Modem to be attached to it, and has support for setting up a openvpn server and you need to be OK with leaving the Internet on all the time just make sure you dont have any services running that use up bandwidth and you should be ok. You can can connect both raspberry pi and IP camera to that router. Setup Openvpn server open the UDP port required and download the certificates, You should be able to vpn into your network and manage it through SSH or something remotely.
The second option is tailored to you but still requires swapping the 4G Modem with another one that supports these things: Wake on LAN, openvpn server, supports ssh into it over LAN and either has 4G support through a sim card slot or a usb port with modem support.
You can then have it setup so this new Router-1 is switched off with wake on lan configured on it and the raspberry pi to send the magic packet. You can use something like this to get an idea of how WoL https://www.lifewire.com/wake-on-lan-4149800. You can use cron on your raspberry pi to send WoL signal to Router 1 once a week which would eventually give you internet access once the router is up. You have to setup a vpn server on it and forward the required port and download the certificates. When your scheduled WoL cron runs make sure you are able to connect through vpn then access network resources you wish, at the end when you are done you can ssh into the router-1 and turn it off.
I hope this helps. I had a look at the router models you are using and it doesnt leave you with many options. You can get cheap second hand routers online that support everything that is required.

IOT Raspberry Pi 3 over no internet

I've worked a tad with IOT on Raspberry pi before, but as a student I ran into a problem and was hoping someone could answer my question. So I need to run Windows IOT Core on the Raspberry Pi 3 (if it was up to me I'd use raspbian or some other flavor of linux, but it's not up to me) and I need to run it at a school who's network I don't have access to. Is there any way of running IOT on raspberry Pi without an internet connection. I had read somewhere that I could buy a router (and even though there was no internet connected to it) I could run ethernet from the router to my laptop and another from the router to the raspberry pi and ssh into the pi from my laptop. Is this true? and how would I go about ssh-ing into the pi? OR is there a better/alternative solution to running IOT with no internet?
You can directly connect Raspberry Pi to your laptop with the network cable. Then the Raspberry Pi will get an IP address. With this IP address, you can either debug app with Visual Studio or connect to the Raspberry Pi via SSH. There are some tools like IoT Dashboard or Device Portal you may need.
For more information about connecting Windows 10 IoT Core, you can reference Windows 10 IoT documentation->Connect your device.

Raspberry Pi as standalone Server for Octoprint

I am working on Octoprint for 3Dprinter. Using Raspberry Pi as server and it is working fine with Raspbian OS.
But the system works only when it is connected to internet. Can I run the same without internet and How I can change the UI.
Technically you don't have to be connected to the internet, but OctoPrint is a web server so in order to connect to it, you need to at least have a LAN connection between your client and your Raspberry Pi. If you just intend to use it from localhost (ie client and server are the same machine) you just need enough networking to allow loopback to work. Which as idstam pointed out isn't a programming question.
On changing the UI, that could be a programming question, but your query is very non-specific. OctoPrint is written in python and has a pretty rich plugin system to allow you to add UI and replace parts of the UI. It is also well documented at http://docs.octoprint.org.