I am working on an Arduino Uno R3 which i had bought from http://www.w11stop.com/ard-uino .
I wanted to have the ability of controlling the Arduino wirelessly, like stopping the Arduino without having to pull the power-plug every time. Is it possible?
Yeah why not?
To control it wirelessly you will need to add extra hardware to the Arduino. There are a number of different options for how to communicate with the Arduino wirelessly: WiFi, Bluetooth, IR, other radio options such as nRF24L01+. Which is best really depends on what you're trying to accomplish and what you want to use to control the Arduino. If you're using a computer or phone then WiFi or Bluetooth would make sense. If you're using a remote control then IR would make sense.
Maddy just decided to ask the identical question in the completely inappropriate arduino-forum issues tracker:
This is the second time they've done this and I already asked them not to the last time:
http://forum.arduino.cc/index.php?topic=468968.0
This user has two accounts, the other is:
http://forum.arduino.cc/index.php?action=profile;u=719542
Maddy, we're doing our best to help you. If you have more questions then feel free to ask them here. The forum-issues repository on GitHub is only to be used for reporting bugs with the Arduino Forum. Please stop posting issues there. You're being extremely disrespectful of our community.