I have been thinking about this for a while. We know some games can be played through hotspots. While playing the games we can even send message. An example is the Doodle army mini militia. I was thinking of building an app where only my friends can send messages at a short distance if they are connected to the hotspot.
I did an experiment today. I set up a hotspot. I connected two phones to the same hotspot with the internet. (three phones. one phone only to open the hotspot. The other two just to connect to the hotspot) So, now I tried to send a message to the other phone through what's app. I sent the message through the second phone to the third phone. The message was successfully sent to the third phone. We knew this would work. It is a very simple process. Now my question is below.
When I disconnected the data connection on the first phone. Remember the hotspot is still on. The only thing is that there is no internet. Now I sent a message again from the second phone to the third phone. This time the message did not go through. I knew the message would not go through. The question is why does there have to be a proper data connection with the internet for the message to go through? Well, there is already a connection where phones have the path to send the message. We also know some games can send messages while connected to hotspots without the internet.
