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