[Free] UDP client extension



I have an application in which many devices sends their status to the master device (a phone with active hotspot).
I noticed that to receive the status messages with this extension, I have to send a message and only after that I receive messages.
The problem is that I should monitor the status messages to know which device is connected to the net and after knowing that, send messages to each device.
So the first question is:
Knowing the communication port, How can I retrieve the IP of all devices connected ?
In a desktop programming language, I use the UDP READ function that return me the the IP of the sender of every message without sending anything. How can i do it in Thunkable? Is it possible?
Thank you so much