Android Question how to dedect IP adresses of connected clients on mobile hotspot? [solved]

[Hans- Joachim Krahe]

Hi there, sorry not to find answer in knowledge pool, but is there a way to request the connected clients in Mobile Hotspot? .. or to send a UDP package to all connected clients on same Port?

 

[Peter Simpson]

Maybe this will help you.

Android Wifi Hotspot Manager

It wraps this Github project. It prints the connected clients to the B4A log. We can panel beat it a bit if I know what info you would like to have returned to the B4A project. I have tested it between my tablet (client) and cell phone (hotspot) and it seems to work 100%. Note the permissions...

www.b4x.com

Enjoy...

 

[Erel]

or to send a UDP package to all connected clients on same Port?

MQTT Chat with Auto Discovery
Ignore the MQTT part.

 

[Hans- Joachim Krahe]

thanks so much, great help. Nearly works, but Arduino only finds MqttClient, but not broker. Will open another thread at arduino

 

[Hans- Joachim Krahe]

...don't understand, why Android with mobile hotspot allows to start Client and server, while connected Android only allows to start server, even if server is started on mobile hotspot Android ??

... now I exchanged the mobile hotspot direction and have different result. Button 'Connect at client' is enabled now, but while connecting, there is a android.system.ErrnoException: Connection refused. So it seems to be a handy specific error. I'm gone to try further