Recently we received an email from RTL-SDR.com reader @Ivoidwarranties about his latest project which involved using a HackRF to reverse engineer the RF protocol used by a public parking electronic display. Once reverse engineered @Ivoidwarranties used a XR-2206 monolithic function generator, hybrid RF amplifier and an Arduino to create a device that overrides the public parking display and plays a game of Tetris on it.
We don’t have any details on the HackRF reverse engineering side of things, but he has uploaded a video to YouTube showing the hack in action.
Reverse engineering a public parking electronic display to play Tetris
Source: RTL SDR