Broadcast a Wi-Fi network on Ubuntu 24.04

Using my laptop with Ubuntu 24.04 I'd like to simulate a device (a mobile camera) which normally broadcasts a Wi-Fi network and runs a REST server on port 8099 (by sending REST messages to that server it is possible to control the camera). The workflow with the actual camera looks like this: 1. Turn on the camera. 1. Connect the PC to camera's Wi-Fi network. 1. Check gateway address of the network (e.g., 192.168.1.10). 1. Manipulate the camera using its REST API (e.g., to take a photo, send HTTP GET message to http://192.168.1.10:8099/api/takePhoto ). The "simulated" Wi-Fi network broadcasted by the laptop should use IPv4 addressing and should have gateway address – as the real camera device is controlled by sending REST messages to gateway address. No connection to the Internet is needed. I've tried to setup a hotspot and than use nm-connection-editor to change its parameters: * "Wi-Fi" tab * Mode: Ad-hoc * "IPv4 Settings" tab * Method: Manual * Address #1 * Address: 192.168.1.100 * Netmask: 24 * Gateway: 192.168.1.1 * Require IPv4 addressing for this connection to complete: ON * "IPv6 Settings" tab * Method: Disabled but the results are not satisfactory – when I connect to that Wi-Fi network on my Windows 10 machine, I see only IPv6 address and no gateway address. When I try to obtain gateway IP address of this network, I get 0.0.0.0. Is it at all possible to setup the network I desire on Ubuntu 24.04? Is so, what should I do to achieve intended results? PS I have almost no experience with networking.