My first project has been the 4wd robot. I finally got it all working yesterday, but as soon as the motor kicks in, I lose my WIFI signal on the Yun board.
I am forced to plug in and upload sketches via USB.
In the end I really want the Yun to grab directions or commands from the Internet.
Has anyone else had a similar issue?
Separate power supply of Yun and Motor Shield.
Agree, make sure the motor shield has it's own power. Some motor shields can supply power to the Arduino, but remember that the Yun draws MUCH more power than the standard Uno or Leonardo. If your motor shield has a jumper for supplying power to Arduino, turn it off first, and make sure the Yun can function 100% on it's own power. I personally use a 2A USB adapter. Also, try not to power anything else on the Linino USB port if you can help it.
sonnyyu:
Separate power supply of Yun and Motor Shield.
Agree
Thank you all!