I developed an android app to send data from android to arduino uno + wifi shield and vice versa. I already can send from android to arduino, but i don't know how i send from arduino to android.... i just need an message that tell me if the data sent from android to arduino were well received...
I'm using this shield
if you want i can send you my app
Please help me on this problem, because i already googled and tested a lot of things that i found on the internet, but still have no success.
tell me something please
What I have tried:
I already googled a lot, and tested a few codes, but i have no success...