I don’t think GDevelop itself could send serial communications, however if your other hardware that can control those systems and you could get some sort of interaction based web-server on it (basically a private API), you can use the Network Communication Event Actions to send/receive data from that system.
I know that people have been using my MQTT extension (available in the built-in extension gallery) successfully to interact with internet-capable arduinos. It may be possible to make serial communication via WebUSB but that would be pretty hard to do.
Hi !
Could you give me more informations about your MQTT extension and how it works please ?
Ultimately, if you or those people who have been able to interact with arduino could explain me how they did it, that would be great ! Thanks a lot !