Hi all! How can I make a very simple network? I have an android application installed on several smartphones. I need to send a signal to other applications when I press one button in the application. I only need 1 function from the network. I have little experience with PUN, but it gives a delay, I need something as fast as possible. So that you can transmit a network signal via Bluetooth or Wifi. What solution is worth exploring for this? Thank you.