Figure out how to connect and communicate with a PS4 controller. This may need doing before #5 is submitted to OSH park so that it can be included in the first version (although not necessary).
RN42 doesn't look like it will work (cannot get it to pair). Try nrf8001 from adafruit. This will require SPI library and decoding the messages received (if it pairs). If it works, PCB prototyping will most likely be required because a custom trace antenna will be required (as in the adafruit breakout).
Figure out how to connect and communicate with a PS4 controller. This may need doing before #5 is submitted to OSH park so that it can be included in the first version (although not necessary).
RN42 doesn't look like it will work (cannot get it to pair). Try nrf8001 from adafruit. This will require SPI library and decoding the messages received (if it pairs). If it works, PCB prototyping will most likely be required because a custom trace antenna will be required (as in the adafruit breakout).