Help required on school project.

[Jenkin Wong]

Sorry for bad English though, but the biggest problem of my problem is I don't even know how to google with the terms of my problem, I really hope I can get some help in here. Any kind of reply is truly appreciated.

So I'm a student in a college now enrolled with the final project struggling to get my software engineering degree, somehow I have the problem that the department which manages whole school's network kind of "unable" to answer. Which lead me to this forum since I am a big fan of LMG. My project includes implementing an "offline messenger" kind of smartphone app for the campus, and I decided to use the android's NSD to register user's phone with a service and let others with the same app to detect it and establish the connection.
So here's the problem, as far as I know, my school network had only one ISP, which is also a least line, and the campus network is setup using multiple AP throughout the campus perimeter, and with my own device, I can get the IP something like 192.168.50.xx, with different areas, the IP can also be 192.168.48.xx, but the SSID and the gateway are same wherever I go, so I went to the department and ask them if devices with this kind of IP address can "see" each other, or for more specific, can my NSD find the service using this kind of network setup. But the people inside told me they hired others to do the networking, so they really don't know much to answer all my questions.
Which comes to a summary of my question:
1) IPs like 192.168.50.xx and 192.168.48.xx, can they detect each other in the network? (With a single ISP but multiple AP with same SSID and gateway)
2) If not, can NSD scan through the whole network to search for services in such condition? (Like even they cannot "see" each other but they are still in the same line)
3) Or the worst case, if not, is there a way to better implement such kind of smartphone app?(Please....)

Since I'm just a student, I will provide any further details the best I can. An apologize first before i couldn't answer any network expert details....
 

Awaiting precious replies, patiently....

[keelsey9]

If the Subnetmask is 255.255.0.0 its possible to see each other is its 255.255.255.0 then its not possible

[PeachyUwUSenpai]

buy your own router and demo it on your own network not on the schools it will make it easier since they probably have firewalls in place and a bunch of other shit

[Jenkin Wong]

2 minutes ago, keelsey9 said:

If the Subnetmask is 255.255.0.0 its possible to see each other is its 255.255.255.0 then its not possible

Appreciate the answer, but they kind of don't want to let me know how the subnetmask is set or they just don't know what it is.......they are kind of trying hard to ignore me.....

 

5 minutes ago, Alaradia said:

buy your own router and demo it on your own network not on the schools it will make it easier since they probably have firewalls in place and a bunch of other shit

Appreciate the answer, sorry but I already thought of doing that but I also found out routers are quite expensive in my country, and I don't have any income to do this kind of experiment.....

[PeachyUwUSenpai]

Just now, Jenkin Wong said:

Appreciate the answer, but they kind of don't want to let me know how the subnetmask is set or they just don't know what it is.......they are kind of trying hard to ignore me.....

 

Appreciate the answer, sorry but I already thought of doing that but I also found out routers are quite expensive in my country, and I don't have any income to do this kind of experiment.....

you can check the submask your self with ifconfig or ipconfig if on windows 

[PeachyUwUSenpai]

you could try mesh networking a bunch of esp8266 or a orange pis they tend to be cheap but it will take alot of time you could also use your phone to host a hotspot and use that 

[Jenkin Wong]

3 minutes ago, Alaradia said:

you can check the submask your self with ifconfig or ipconfig if on windows 

That is really helpful! Actually I've used ipconfig that much but never noticed the subnetmask on there.....really feel dumb about this.

 

5 minutes ago, Alaradia said:

you could try mesh networking a bunch of esp8266 or a orange pis they tend to be cheap but it will take alot of time you could also use your phone to host a hotspot and use that 

I.....couldn't understand the first part but the phone hotspot thingy I will try! Thanks for the help!