We have seen quite a few cool Rasberry PI mods, the latest one looks to be one of the funnest to date, it is a device called the Rickmote, which was created by Dan Petro Bishop Fox.
The Rickmote lets you take over a Google Chromecast, and it will automatically let you Rickroll a Chromecast, and play the famous Rick Astley video.
Under normal use, the Chromecast can be sent a deauth command that disconnects it from wifi. But there’s a bug: when the media player is kicked off the local network it enters a config mode and becomes a wifi hotspot – waiting for machines nearby to connect with it and send it a new configuration.
This hack is the work of Dan Petro, a whitehat at security consultancy Bishop Fox. He’s using a Pi, a couple of wifi cards and a touchscreen – along with Aircrack (open-source WEP and WPA-PSK-cracking software). It takes the device about thirty seconds to connect, take over the network and get Rickrolling; and, of course, it has to be within wifi range.
As you can see from the video, the Chromecast is disconnected from WiFi and then connected to the Rickmote, and the video plays.
You can find out more details about the Rickmote over at Raspberry PI at the link below.