user606257

@eyoung100 In reality the device is neither a camera nor a light bulb. In the graph I have added a camera to try to make the example clearer since it is a very common case. Device A is a fishing echo sounder, specifically a Deeper Chirp model.

@eyoung100 Device C does have the ability to connect to A and also create a hotspot. Also, if B cannot create a wifi point while connecting to A due to hardware, I can add a second wifi adapter.

@eyoung100 I am creating the hotspot on the raspberry (B), when I turn it on a sign appears indicating the Wi-Fi connection to A will be disconnected while the hotspot is on.

@eyoung100 Yes, when I create a hotspot on B, the wifi is disconnected. This happens using a raspberry pi4 on Ubuntu, I don't know if this limitation comes from the raspberry hardware or from Ubuntu

@eyoung100 Sure, if I create a hotspot on B I can connect C to B, but the goal is to receive data from A...

@eyoung100 Connect to B how? Creating a hotspot in B?

@eyoung100 Yes, B has an internet connection (via a 4G dongle) and is connected to A's Wi-Fi.

@eyoung I would like to know if I can add another device (B), with an OS that does support simultaneous connection of network interfaces (for example Ubuntu) and share the internet through the Wi-Fi created by A.

@eyoung100 A is not configurable, it is a purchased device and I cannot modify anything. A emits a Wi-Fi signal and to receive data it is necessary to connect an Android device (C) to A's Wi-Fi network in order to receive data from its application. If A could connect to a hotspot issued by C there would be no problem since A and C would be connected and C would maintain an internet connection. However, A's app does not support that functionality and the only way to receive the data captured by A is to connect C to the Wi-Fi created by A.