I am thinking about a project, but I will need let's say two Arduino Uno. I can see that we can just use different USB ports on a PC, but what about an Android device?
I want to "run commands" from it on both Uno boards. Is it possible to connect it as it is single board, just both in parallel? I do not need communication between the boards, just with the smartphone.
For example, let's say that one of the boards will control a green LED and the other a red LED. I want to send from my phone on the serial "toggle green" or "toggle red" and both the boards will change the state of the LED connected to it accordingly to the "command" received. Will both boards be able to receive the "command"?
EDIT: I see that I forgot to add that I may need to receive on the phone from any of the boards. Something like feedback.